Bolthole Index

San Patricio County, Texas

Building permits, zoning and septic rules in San Patricio County, Texas

42Index Score / 100
#191 of 254 in Texas

Unincorporated San Patricio County, Texas requires a floodplain development permit before residential construction, additions, manufactured-home placement, and other development1. Separate fire-code construction permits cover commercial buildings, public buildings, and multifamily dwellings with 4 or more units2. Unincorporated land has no county zoning, while cities including Portland administer zoning; county septic rules apply outside municipalities, with county personnel also enforcing septic rules in the San Patricio portion of Aransas Pass under a city agreement3456.

At a glance

Building permit
A floodplain development permit is required before residential development; fire-code permits apply to commercial, public, and multifamily buildings with four or more units712
Zoning
No county zoning in unincorporated areas; municipal zoning applies inside cities including Portland34
Fire code / commercial permit
Required only for commercial establishments, public buildings, and multifamily dwellings of four or more units in unincorporated areas8
Septic permits
County OSSF permitting outside municipalities; county enforcement also serves the San Patricio portion of Aransas Pass56
RV / tiny home living
No county zoning-based restriction in unincorporated areas; development and septic rules still apply9110
Minimum home size
None set by the county9
Water wells
All wells require district registration; wells expected to exceed 25,000 gallons per day require a district permit11
Septic soil difficulty
Only 12.6% of county soils are free of severe limits for a conventional drain field12

Who to call

Floodplain permits

San Patricio County Floodplain/Permits Manager

Floodplain development permits for all unincorporated construction, and, per the county's residential permitting page, the online application point for residential and septic-only permits

361-587-3567

sboutwell@sanpatriciocountytx.gov

Building permits

San Patricio County Fire Marshal

Fire-code construction permits, inspections, and certificates of compliance for commercial establishments, public buildings, and multifamily dwellings of four or more units in unincorporated San Patricio County

(361) 587-3558

emc@sanpatriciocountytx.gov

219 W. 5th Street, Building 7, Sinton, TX 78387

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in San Patricio County means bringing your own water and power. The kit we’d start with:

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

Do you need a building permit in San Patricio County, Texas?

Unincorporated San Patricio County requires a floodplain development permit before a new home, manufactured home, shed, other structure, major addition, renovation, or septic installation; the requirement applies outside mapped flood zones as well as inside them1. For a new single-family home, development-permit fees are $275 plus $0.05 per square foot of enclosed area in a flood zone, or $175 plus $0.05 per square foot outside one, and all fees double if work starts before the permit is issued13. The separate county fire-code permit does not cover an ordinary single-family home: it applies to commercial establishments, public buildings, and multifamily dwellings with 4 or more units in the unincorporated county2. A qualifying agricultural-use-only structure can avoid the fire-code permit, but only when it meets the registration, farm-use, separation, and no-human-shelter conditions2.

Who issues building permits in San Patricio County?

The San Patricio County Floodplain/Permits Manager receives online development-permit applications for unincorporated projects14. The residential application requires a deed, house plans, site plan, project-value affidavit, and applicable flood documents; submit plans at least 2 weeks before review14. The Fire Marshal handles fire-code construction permits for covered commercial, public, and multifamily projects2. In Portland, the city issues building permits; Odem issues building permits for RV and manufactured-home parks and subdivision areas1516. Corpus Christi and Aransas Pass, cities that reach into San Patricio County, issue their own building permits1718. Building-permit jurisdiction does not settle septic authority: the county administers septic rules outside municipalities and acts for Aransas Pass in its San Patricio County portion; ask each other city who issues its septic approval56. Water-well registration stays with the countywide San Patricio County Groundwater Conservation District11.

Does San Patricio County have zoning?

Unincorporated San Patricio County has no county zoning ordinance, so the county sets no zoning-based minimum home size, minimum lot size, setbacks, lot-coverage limit, or building-height limit there39. Subdivision and floodplain rules still regulate unincorporated land1920. Portland, Taft, and Odem administer their own zoning42122. Corpus Christi, which reaches into San Patricio County, also administers city zoning23. Sinton maintains a municipal zoning map, and Ingleside has a Planning and Zoning Commission and Board of Adjustment2425. County septic rules apply outside municipalities, with a separate agreement extending county enforcement to the San Patricio portion of Aransas Pass56. In municipal extraterritorial jurisdictions, overlapping county and municipal subdivision rules use the more stringent conflicting provision26.

How do septic permits work in San Patricio County?

Outside municipalities, San Patricio County is the OSSF (on-site sewage facility) permitting authority and applies its own septic rules5. A septic permit and approved plan are generally required to construct, alter, repair, extend, or operate a system, and the county fee schedule lists $50 plus an environmental-process fee for a septic-only new or replacement system2713. The county reviews proposals and inspects systems as needed for compliance28. A single-family system on at least 10 acres can avoid planning materials, the septic permit, and inspection only when every condition is met, including a licensed site evaluation, a 100-foot property-line setback, one dwelling, on-site effluent disposal, and no nuisance or groundwater pollution2927. Pit privies and portable toilets are prohibited as waste-disposal systems on lots platted under county subdivision rules10. Only 12.6% of county soils lack severe limits for a conventional drain field, so test the site before choosing a system12. County rules restrict septic tanks in floodplain hazard areas, so acreage alone does not settle sanitation approval5.

Can you live in an RV or tiny home on your land in San Patricio County?

San Patricio County sets no zoning-based restriction on RV or tiny-home occupancy in unincorporated areas9. A floodplain development permit still applies to structures, manufactured-home placement, and other development there1. On lots platted under county subdivision rules, pit privies and portable toilets cannot serve as waste-disposal systems; that restriction does not establish a countywide ban on every off-grid sanitation method10. Residential subdivisions creating 2 or more lots of 5 acres or less must meet county water and sewer standards30. For a temporary stay, San Patricio County Park lists RV sites with hookups at $25 daily or $250 monthly, and without hookups at $10 daily or $100 monthly; those park rates do not establish permission to live in an RV on private land31. Inside a municipality, ask the city about occupancy and septic authority rather than applying the unincorporated answer325.

How do you build a home in San Patricio County, step by step?

  1. Confirm city limits, extraterritorial jurisdiction, subdivision status, and flood zone before designing the project1933.
  1. For an unincorporated homesite, submit the development-permit application, deed, plans, site plan, affidavit, and required flood documents to the Floodplain/Permits Manager at least 2 weeks before review3414.
  1. Apply for the county septic permit unless every condition of the 10-acre exception is met2729.
  1. Register the water well with the groundwater district and obtain a district permit if expected production exceeds 25,000 gallons per day11.
  1. Obtain the development permit before work; covered commercial, public, and multifamily projects also need the Fire Marshal's construction permit12.
  1. Obtain a TxDOT driveway permit for state-highway access35.
  1. Complete final inspection and the required final elevation certificate before the county issues its Certificate of Occupancy Letter36. For fire-code-covered buildings, request inspection in writing by construction completion; the county generally must begin within 5 business days37. Covered buildings also need a final, conditional, or partial Certificate of Compliance before occupancy38.

What should you check before buying land in San Patricio County?

Check flood status first, because it drives elevation documents, the permit fee tier, and manufactured-home placement rules3339. Only 12.6% of county soils lack severe limits for a conventional drain field, so test soils early12. County subdivision rules regulate land divisions outside municipalities; residential divisions into 2 or more lots of 5 acres or less require an approved recorded plat and compliant water and sewer service192630. An agricultural, farm, ranch, wildlife-management, or timber-production division may avoid platting only if the owner does not lay out a part of the tract described by Texas Local Government Code §232.001(a)(3); platting applies when the qualifying primary use ends40. Review plat access notes because some larger-lot subdivisions require driveway culverts and reverse-frontage lots can be denied access to the major street4142. All wells require groundwater-district registration, and higher-capacity wells need a district permit11. Certain wholly private driveways serving outbuildings or delivery entrances fall outside the subdivision rules’ street provisions; this exclusion does not waive other access requirements or the TxDOT driveway permit for state-highway access4335.

Watch-outs

  • Texas allows limited owner-performed trade-license exemptions, but we could not confirm a separate San Patricio County owner-builder exemption from development permits or inspections; ask the Floodplain/Permits Manager about a home project4434.
  • For fire-code-covered buildings, a temporary Certificate of Compliance costs $200 and lasts 90 days, with inspected, operational fire-protection systems required and a final certificate due within that period38.
  • The groundwater-district rules do not resolve a well rated at exactly 25,000 gallons per day, so ask the district before drilling at that capacity11.

Sources

  1. Residential Development Permitting Information, quoted and re-checked
  2. San Patricio County Fire Code with Orders, quoted and re-checked
  3. San Patricio County Subdivision Rules (2026 county census)
  4. Portland: Planning & Zoning (San Patricio County), quoted and re-checked
  5. San Patricio Co. Subdivision Rules, quoted and re-checked
  6. Aransas Pass: Interlocal Cooperation Agreement for OSSF Enforcement Services (San Patricio County), quoted and re-checked
  7. San Patricio County Fire Code with Orders (2026 county census)
  8. San Patricio County Fire Code, quoted and re-checked
  9. Texas law on county zoning and building authority
  10. San Patricio Co. Subdivision Rules, quoted and re-checked
  11. San Patricio County Groundwater Conservation District Rules, quoted and re-checked
  12. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  13. San Patricio County Floodplain Development & Permitting Fee Schedule, quoted and re-checked
  14. Residential Development Permitting Information, quoted and re-checked
  15. Portland: Permits (San Patricio County), quoted and re-checked
  16. Odem: Odem Code § 28-23, Building permit required (San Patricio County), quoted and re-checked
  17. Corpus Christi: Understanding the Development Process | City of Corpus Christi (San Patricio County), quoted and re-checked
  18. Aransas Pass: Building Standards Board (San Patricio County), quoted and re-checked
  19. San Patricio County Subdivision Rules, quoted and re-checked
  20. Floodplain Development, quoted and re-checked
  21. Taft: Taft Code of Ordinances, Sec. 58-9, Manufactured Home district (MH) (San Patricio County), quoted and re-checked
  22. Odem: Odem Code § 50-184, Schedule of uses (San Patricio County), quoted and re-checked
  23. Corpus Christi: Zoning | City of Corpus Christi (San Patricio County), quoted and re-checked
  24. Planning and Zoning Commission, quoted and re-checked
  25. City of Ingleside Sample Ballot, quoted and re-checked
  26. San Patricio Co. Subdivision Rules, quoted and re-checked
  27. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  28. San Patricio Co. Subdivision Rules, quoted and re-checked
  29. Chapter 285 - On-Site Sewage Facilities, quoted and re-checked
  30. San Patricio Co. Subdivision Rules, quoted and re-checked
  31. County Park, quoted and re-checked
  32. Floodplain Development, quoted and re-checked
  33. County Floodplain Development, quoted and re-checked
  34. San Patricio County Floodplain/Permits Manager (sanpatriciocountytx.gov)
  35. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  36. County Flood Plain Development, quoted and re-checked
  37. San Patricio County Fire Code, quoted and re-checked
  38. San Patricio County Fire Code, quoted and re-checked
  39. San Patricio County Flood Damage Prevention Order, quoted and re-checked
  40. San Patricio County Subdivision Rules, quoted and re-checked
  41. San Patricio County Subdivision Rules, quoted and re-checked
  42. San Patricio County Subdivision Rules, quoted and re-checked
  43. San Patricio County Subdivision Rules, quoted and re-checked
  44. Exemptions to Electrician Licensing (Texas statewide rule), quoted and re-checked

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Found land here? Start a Property Hunt →

Compared with neighboring counties

Like all 6 of its neighbors, San Patricio County has no countywide zoning.

RuleSan Patricio CountyNueces CountyRefugio CountyAransas CountyBee CountyJim Wells CountyGoliad County
Building permitLimitedNot requiredLimitedLimitedLimitedNot requiredNot required
County zoningNoNoNoNoNoNoNo
Septic permitsSan Patricio CountyCorpus Christi-Nueces County Public Health DistrictRefugio CountyCounty Dept. of Env. HealthCounty Community AffairsCounty Safety & Inspection Dept.County Env. Services Dept.

County locator

San Patricio County in Texas

42
County map
San Patricio County highlighted among the Texas counties · colored by Index score

How San Patricio County scores

Seclusion34100% ev.
Self-Sufficiency1896% ev.
Admin Boringness8290% ev.
Durability46100% ev.
Property Autonomy71100% ev.
Carry Cost80100% ev.

Evidence strength: 97%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$211kTypical home
1.5%Property tax
$3,388Land / acre
31.8"Annual rain
23.3% of yrsSevere drought
16.7 / yr (+14.6)Mid-century 100°F days
27.2 daysMid-century dry spell
2.89" (+5.7%)Mid-century 1-day rain
1.38×Wildfire change factor
100%Forward climate coverage
$1,945Home insurance / yr
-1.9% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
184,772People within 30 min
788,069People within 2 hr
54,263Radius comparison (15 mi)
101.9People / sq mi
0.8%Federal land
100%Land at 15% slope or less
12.6%Soils rated "not limited" for septic (strict USDA rating)
45,107 acWorkable land screen
8.5%Wooded land
5.7 tonsBiomass / forest ac
72.3°FAvg temp

Scout San Patricio County

Camp here before you commitBook a few nights nearby on Hipcamp →Already own land here?Earn money hosting campers — get $100 when you become a Hipcamp host →

Some links are affiliate or referral links — we may earn a commission, at no cost to you.

Property hunt

Find land. Bring the promising ones back.

Search live inventory elsewhere, then cost and vet each candidate here. No copied listings, account, or paid data feed.

View your full hunt →
ZillowLand & lotsRealtor.comLand listingsLandSearchRural & vacant land

Each button opens a current land search for San Patricio County. Listing sites control their own results and filters.

Analyze a property
Add setup-cost allowances

Use rough quotes or placeholders. Blank fields count as $0.

Working estimate

—land + entered setup costs
Asking $ / acre
—
Setup allowance
—
All-in $ / acre
—

A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.

Before an offer

Parcel due diligence

0/8 checked

Saved properties and checklist progress stay on this device. Bolthole Index does not receive them.

Cities and towns in San Patricio County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Gregory · Ingleside · Ingleside on the Bay · Town of Lake City · Town of Lakeside · Mathis · San Patricio · Sinton

Answers from the rulebook for San Patricio County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

San Patricio County rules

  • Building permitLimited

    Construction of buildings or substantial improvements in unincorporated San Patricio County subject to the San Patricio County Fire Code.

    • The Fire Code applies in unincorporated areas only to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units; county-owned or county-operated buildings anywhere in the county are also governed by the Code.
    • The Fire Code does not apply to an industrial facility that the San Patricio County Fire Marshal determines qualifies for the exception in Section 233.062(b) of the Texas Local Government Code.
    • An agricultural-use-only structure is excepted if all stated criteria are met: constructed by a holder of Texas Agricultural or Timber Registration; used only for single-farm-or-ranch storage of farm equipment, animal shelter, or handling farm products; located at least 300 feet from any residence or other structure not owned by the same owner; and never used for human residence or shelter.
    • The permit application must include a Fire Code Design and Compliance Review Sheet signed and sealed by a Texas-authorized licensed architect or engineer, two complete sets of construction and site plans drawn to scale, and a permit fee under Exhibit B; the Fire Marshal may require additional information, drawings, specifications, or documents.
    • A permit is issued after the appropriate fee is collected if the proposed building or substantial improvement meets the Code; if applicable, it is issued as an addendum to the county floodplain development permit.
    • Construction must start within 180 days after permit issuance or the permit is void; two six-month extensions may be obtained upon written request.
    • Fees are established by a separate San Patricio County Commissioners Court order.

    multifamily dwelling threshold: >= 4 units (The Fire Code applies to multifamily residential dwellings consisting of four or more units.) · agricultural structure separation: >= 300 feet (The agricultural-use-only exception requires the structure to be at least 300 feet from any residence or other structure not owned by the same owner.) · construction commencement deadline: 180 days (Two six-month extensions may be obtained upon written request.)

    “No [...] shall start or authorize construction of a building or Substantial Improvement within an unincorporated area of San Patricio County without first securing a permit”
    2 more reviewed findings on this topic
    • Limited — Any development in the unincorporated areas of San Patricio County, including buildings, structures, additions, remodeling, manufactured or mobile-home placement, grading, paving, excavation, drilling, and storage of equipment, vehicles, or materials.
      “Any party undertaking development within the unincorporated areas of San Patricio County must obtain a floodplain development permit prior to the work commencing.”
    • Limited — Residential development and construction in unincorporated San Patricio County, including a new home, manufactured home, shed, other structure, major addition or renovation, or septic-system installation.
      “A Floodplain Development Permit shall be required to ensure compliance with the Flood Damage Prevention Order.”
  • Building code adoptedPartial

    San Patricio County Fire Code requirements for buildings in unincorporated San Patricio County and county-owned buildings.

    • The code applies in all unincorporated areas and on land and facilities owned or operated by San Patricio County.
    • For unincorporated areas, the code applies to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units.
    • The code does not apply to an industrial facility that the Fire Marshal determines qualifies for the exception in Texas Local Government Code §233.062(b).
    • No person may start or authorize construction of a building or substantial improvement in an unincorporated area without first securing a permit under the code.
    • Agricultural-use-only structures are excepted only if all listed criteria are met: Texas Agricultural or Timber Registration; single farm or ranch use for storage, animal shelter, or handling farm products; at least 300 feet from any residence or other structure not owned by the same person; and never used for human residence or shelter.

    referenced building/fire code edition: International Fire Code, 2018 Edition (Subject to the San Patricio County Fire Code additions, insertions, deletions, and changes.) · construction permit start deadline: 180 days (Two six-month extensions may be obtained upon written request.)

    “this Fire Code shall only apply to buildings constructed in or on any portion of an unincorporated area of San Patricio County”
  • InspectionsLimited

    Buildings subject to the San Patricio County fire-code subchapter: commercial establishments, public buildings, and multifamily residential dwellings of four or more units in unincorporated areas.

    • The county must inspect a covered building for fire-code compliance.
    • The owner must request the inspection in writing on or before completion of construction or substantial improvement.
    • The county generally must begin inspection within five business days after receiving the written request; if it does not, the building is considered approved for purposes of the subchapter.
    • A county with a population over 3.3 million has a ten-business-day rule, but that exception does not appear applicable to San Patricio County.
    • The county may inspect at any reasonable stage of construction or after completion.
    • The county fee schedule states that a general inspection includes the initial inspection and one re-inspection; additional re-inspections are separately charged.

    inspection-start deadline: 5 business days (Ten business days applies only to a county with a population of more than 3.3 million; indoor retail fireworks sites remain subject to five business days.) · general inspection fee: 150 USD (Includes initial inspection and one re-inspection; later re-inspections are $100 each.)

    “The county shall inspect a building subject to this subchapter to determine whether the building complies with the fire code. [...] Except as provided by Subsection (e-1), the county shall begin the inspection of the building within five business days after the date of the receipt of the written inspection request.”
  • Certificate of occupancyLimited

    Final, conditional, or partial Certificate of Compliance for commercial establishments, public buildings, and multifamily residential dwellings of four or more units subject to the county fire code in unincorporated San Patricio County.

    • A final certificate is issued after inspection determines that the completed building complies with the fire code.
    • For phased completion or build-out, the county may issue a partial certificate for a portion in substantial compliance.
    • If the building does not comply, the county may deny the certificate or issue a conditional or partial certificate and allow occupancy.
    • A conditional certificate must identify violations and provide a reasonable time to remedy them; it may be revoked if violations are not remedied within the specified time.
    • A building may not be occupied until a final, conditional, or partial certificate of compliance is issued.
    • The county fee schedule provides a $200 temporary certificate of compliance, requires a written request with a floor plan, requires the area and all required fire-protection systems to be inspected and operational, limits the temporary certificate to 90 days, and requires a final certificate within that period; an additional temporary certificate may be obtained for $200.

    temporary certificate fee: 200 USD (An additional temporary certificate may be obtained for $200 if a final certificate cannot be obtained within the first 90 days.) · temporary certificate duration: 90 days (A final Certificate of Compliance must be obtained within this period.)

    “A building may not be occupied until a county issues a final, conditional, or partial certificate of compliance for the building.”
    One more reviewed finding on this topic
    • Required — Development in unincorporated San Patricio County subject to the County floodplain-development process, including residential construction.
      “Development shall not be used or occupied until the project has received final inspection, a final elevation certificate and approval by the County in the form of a Certificate of Occupancy Letter.”
  • Local zoningVaries (with conditions)

    Aggregate local-zoning status across San Patricio County: incorporated municipalities may administer municipal zoning, while unincorporated areas are subject to county-administered development controls and may have different rules.

    • In unincorporated San Patricio County, any party undertaking development must obtain a floodplain development permit before work commences.
    • Municipal rules apply within incorporated municipal jurisdictions and may differ by municipality.
    “Portland's new interactive Zoning Map allows you to view zones in detail as of January 2024”
  • Zoning districts · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum dwelling size · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum lot size · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Setbacks · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Lot coverage · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Building height · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Living in an RV · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Camping on your landAllowed

    Temporary camping and RV stays at the San Patricio County Park.

    • The published RV site rates are $25 daily or $250 monthly with hookups, and $10 daily or $100 monthly without hookups.
    • Overnight camping is listed at $20 per night on Friday and Saturday.

    RV site with hookups: 25 USD per day · RV site with hookups: 250 USD per month · RV site without hookups: 10 USD per day · RV site without hookups: 100 USD per month · overnight camping: 20 USD per night (Friday/Saturday)

    “RV Site w/Hookups $250.00 Monthly / $25.00 Daily RV Site w/o Hookups $100.00 Monthly / $10.00 Daily Trailer Storage $100.00 Monthly / $10.00 Daily _________________________________________________________________ Camping Overnight $20.00 per Night (Friday/Saturday)”
  • Tiny homes · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Manufactured homesLimited

    Placement or substantial improvement of manufactured homes in specified flood hazard zones in unincorporated San Patricio County.

    • In Zones A1-30, AH, and AE, manufactured homes outside a manufactured-home park or subdivision, in a new park or subdivision, in an expansion of an existing park or subdivision, or in a park or subdivision where a manufactured home has incurred substantial flood damage must be elevated so the floor is two feet above base flood elevation and securely anchored.
    • Manufactured homes in an existing manufactured-home park or subdivision in the specified zones must have the lowest floor two feet above base flood elevation, or the chassis must be supported by reinforced or equivalent foundation elements at least 36 inches above grade and anchored to resist collapse and lateral movement.
    • A floodplain development permit is required before moving or placing a manufactured home in unincorporated areas.

    elevation above base flood elevation: 2 feet · alternative chassis foundation height: >= 36 inches above grade (Applies to qualifying existing manufactured-home parks or subdivisions.)

    “the lowest floor ofthe manufactured home is two (2) feet above the base flood elevation, or (n) the manufuctured home chassis is supported by reinforced or other foundation elements ofat least equivalent strength that are no less than 36 inches in height above grade”
  • Accessory dwellings · by state lawNo county rule

    Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Who permits septicCounty

    OSSF rules and procedures in unincorporated San Patricio County

    • The county rule applies except within the boundaries of municipalities in San Patricio County.
    • Applicable state laws, regulations, and TCEQ orders must not be violated.
    • Septic tanks are restricted in all county floodplain hazard areas and may be prohibited in other areas upon Commissioners Court determination based on a County Health Department recommendation.
    “The rules, requirements, and procedures adopted by the San Patricio County Commissioners Court, or in the most recently adopted OSSF Order, shall apply to all of the area of San Patricio County except for the areas within boundaries of any municipality in San Patricio County. In no event shall applicable state laws, regulations as may be established by separate regulation, or the orders of the Texas Natural Resource Conservation Commission be violated. Septic tanks are restricted in all Floodplain Hazard Areas within the County and may be prohibited in certain other areas as may be determined by the Commissioners Court upon the recommendation of the County Health Department.”
  • Septic inspectionLimited

    On-site sewage disposal systems addressed by San Patricio County subdivision rules outside municipal boundaries.

    • Inspections are made as necessary to assure compliance; the source does not state that every system receives a mandatory inspection.
    • The rule applies to systems under the County OSSF Order and 30 TAC Chapter 285.
    • Pit privies and portable toilets are not acceptable for lots platted under these rules.

    residential OSSF flow threshold: <= 5000 gallons per day (Systems at or above this threshold must comply with 30 TAC Chapter 317 and the County OSSF Order.)

    “The Commission or its authorized agent shall review proposals for on-site sewage disposal systems and make inspections of such systems as necessary to assure that the system is in compliance with the Texas Health and Safety Code, Chapter 366 and rules in 30 TAC Chapter 285, and in particular §§285.4, 285.5 and 285.30 285.39 and the County OSSF Order. In addition to the unsatisfactory on-site disposal systems listed in 30 TAC §285.3(i), pit privies and portable toilets are not acceptable waste disposal systems for lots platted under these rules.”
  • Off-grid sanitationLimited

    Off-grid sanitation methods for lots platted under San Patricio County subdivision rules outside municipal boundaries.

    • Private OSSF systems must comply with 30 TAC Chapter 285 and the County OSSF Order.
    • Pit privies and portable toilets are not acceptable waste disposal systems for lots platted under these rules.
    • The cited prohibition is limited to lots platted under the subdivision rules and does not establish a countywide prohibition on every off-grid sanitation method.
    “In addition to the unsatisfactory on-site disposal systems listed in 30 TAC §285.3(i), pit privies and portable toilets are not acceptable waste disposal systems for lots platted under these rules.”
    One more reviewed finding on this topic
    • Prohibited — Pit privies and portable toilets as waste-disposal systems for lots platted under San Patricio County subdivision rules
      “pit privies and portable toilets are not acceptable”
  • Well permitLimited

    Drilling or operating a well, or increasing the size or capacity of a well, within the San Patricio County Groundwater Conservation District, whose capacity could reasonably be expected to exceed 25,000 gallons of water per day. The District boundaries are stated by its management plan to be the same as San Patricio County's political boundaries.

    • A permit is required before drilling or operating a qualifying well or increasing its size or capacity.
    • A permit is not required for drilling exempt wells.
    • Registration is required for all exploratory holes, exempt wells, and wells in the District; nonexempt wells satisfy registration by filing an application to drill or operate.
    • Permit applications must be filed at the District office in Sinton, Texas, on District forms and with the required deposit.
    • Each drilling-permit application requires a $250 deposit. The deposit is returned if the application is denied, the application is granted upon receipt of a correctly completed registration and well log, or the permitted location is abandoned without drilling and the permit is surrendered. If the registration and log or abandoned permit is not returned within 180 days after approval, or an extension granted by the District, the deposit becomes District property; upon compliance, it is applied to the initial registration and annual fee.
    • The District publishes a notice stating the applicant, well location, and requested production amount. If no protest is filed within 10 days after publication, the General Manager or Board representative may issue the permit without Board action; a protest triggers Board hearing procedures.
    • If approved, the permittee's production right is limited to the extent and purposes stated in the permit. Operating permits may be valid for no more than five years and may then be renewed.
    • The rules define an exempt well as producing less than 25,000 gallons per day and define a well as producing more than 25,000 gallons per day; therefore, the cited rules do not establish treatment of exactly 25,000 gallons per day.
    • The rules list initial fees for existing exempt wells, new exempt wells, and nonexempt wells, state that those fees are due for 2012 and subsequent February 1 dates, and state that the initial fees will be reviewed each November after 2012; those provisions do not establish that the listed fees remain current in 2026.

    production-capacity threshold: > 25000 gallons/day (The rule text separately defines exempt wells as producing less than 25,000 gallons/day, leaving exactly 25,000 gallons/day unresolved.) · drilling-permit deposit: 250 USD (Subject to the rule's refund and forfeiture conditions.) · operating-permit term: <= 5 years (The rule states operating permits shall be valid for a period not to exceed five years.)

    “A permit is required prior to drilling or operating a well, or increasing the size or capacity of a well such that the well could reasonably be expected to produce in excess of 25,000 gallons of water per day. A permit is not required for drilling exempt wells.”
  • Mandatory utility hookupConditional

    Residential subdivisions of two or more lots of five acres or less in unincorporated San Patricio County

    • The county rules prohibit establishing such a residential development unless water supply and sewer services meet the chapter's minimum standards.
    • Water may be provided through an existing public water system or individual wells/non-public systems, subject to the stated agreements, studies, quality, and availability requirements.
    • Wastewater may be handled through an organized sewerage facility or an OSSF; the rules do not establish a universal requirement that every parcel connect to public sewer.
    • Municipal boundaries are excluded from the county subdivision-rule scope.

    subdivision lot threshold: <= 5 acres (The rule addresses residential developments with two or more lots.)

    “water supply and sewer services do not meet the minimum standards”
  • Agricultural exemptionConditional

    A tract outside municipal limits divided into two or more parts, where the owner does not lay out a part described by Texas Local Government Code §232.001(a)(3) and the land is used primarily for agricultural, farm, ranch, wildlife-management, or timber-production purposes.

    • The exception applies only if the owner does not lay out a part of the tract described by Texas Local Government Code §232.001(a)(3).
    • If the tract ceases to be used primarily for agricultural, farm, ranch, wildlife-management, or timber-production use, the platting requirements apply.
    • The county rules also reproduce exceptions for divisions into four or fewer related-party lots, divisions where all lots exceed 10 acres, and divisions where all lots are sold to veterans through the Veterans' Land Board program, subject to their stated conditions.

    division size: >= 2 or more parts (Owner must not lay out a part described by Texas Local Government Code §232.001(a)(3).) · all-lot acreage alternative: > 10 acres (All lots must be more than 10 acres and the owner must not lay out a part described by §232.001(a)(3).)

    “the land is to be used primarily for agricultural use”
    One more reviewed finding on this topic
    • Conditional — Divisions of land outside the limits of a municipality where the land is primarily used for agriculture, farm, ranch, wildlife management, or timber production.
      “A county may not require the owner [...] to have a plat of the subdivision prepared if: [...] the land is to be used primarily for agricultural use”
  • Subdividing landRegulated (with conditions)

    Divisions of land and subdivision platting outside the corporate limits of a municipality in San Patricio County.

    • The rules apply when land outside a municipality is divided into parts; owners and agents must comply with the county rules and applicable state and federal laws.
    • For divisions subject to the title, the owner must prepare and record a plat in accordance with the county rules, Texas Local Government Code Chapter 232, Texas Property Code Chapter 12, and applicable municipal ETJ rules.
    • A subdivision in a municipality's extraterritorial jurisdiction may be subject to both municipal and county regulations; if they conflict, the more stringent provision prevails.
    • The 2007 document cover states an effective date of January 16, 2007; Section A.5 separately states that the rules are effective the first day of February 2006 and repeals the 2000 rules, creating an apparent date discrepancy.
    • The 2026 county process document states that the plat is reviewed by the Floodplain Manager and other departments, then placed on the Commissioners Court agenda after approval by all parties.
    • A plan-review fee is determined by the Floodplain Development Office after receiving the application and draft plat; all permit fees double if a project began before obtaining a development permit.
    “These rules apply when land in San Patricio County outside of a municipality is being divided into parts.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Divisions outside municipal corporate limits that create two or more lots of five acres or less intended for residential purposes.
      “two or more lots of five acres or less intended for residential purposes”
  • Driveway accessLimited

    Subdivisions outside municipal corporate limits where all lots contain more than one acre, net of easements and rights-of-way.

    • The subdivision must comply with one of two alternatives before final plat approval: install 18-inch rollover curb and gutter on all streets installed or improved, or require the purchaser of each lot to install a driveway culvert.
    • Each driveway culvert must be reinforced concrete, at least 15 inches in diameter and 24 feet in length, and conform to county specifications promulgated from time to time.
    • The subdivider must include in the drainage plan and on the plat a note that the lot purchaser must provide and install the culvert.
    • For subdivisions with any lot containing one acre or less, net of easements and rights-of-way, the subdivider must install 18-inch rollover curb and gutter on all streets installed or improved before final plat approval instead of using the driveway-culvert alternative.
    • The rules are subject to municipal requirements in a municipality's extraterritorial jurisdiction; where municipal and county subdivision regulations conflict, the more stringent provision prevails.

    lot area threshold for driveway-culvert alternative: > >1 acre, net of easements and rights-of-way (All lots must exceed one acre.) · driveway culvert diameter: >= 15 inches minimum (Reinforced concrete and county specifications also required.) · driveway culvert length: >= 24 feet minimum (Reinforced concrete and county specifications also required.) · curb and gutter width: 18 inches (Required alternative for qualifying subdivisions and required for subdivisions with any lot of one acre or less.)

    “driveway culverts are required in the following instances”
    2 more reviewed findings on this topic
    • Not required — Certain driveways and accessways associated with land divisions outside municipal corporate limits, including driveways wholly on private property serving outbuildings or delivery entrances, qualifying commercial or industrial entranceways, qualifying apartment-building driveways, and qualifying private streets.
      “not be considered to be within the purview”
    • Limited — Reverse-frontage lots in subdivisions outside municipal corporate limits that abut or contain an existing or proposed major street.
      “access shall be denied to the major street”
  • Building in a floodplainRequired

    Development in the unincorporated areas of San Patricio County, including construction, additions, grading, paving, excavation, drilling, storage, manufactured-home placement, and septic work.

    • No work may start until a permit has been issued.
    • The permit may be revoked for false statements, a revised effective FIRM, noncompliance with the Flood Damage Prevention Order or state/federal requirements, or work differing from the application.
    • Development may not be used or occupied until final inspection, a final elevation certificate, and County approval in the form of a Certificate of Occupancy Letter.
    • The permit expires if no work has commenced within six months of issuance or by the expiration date on the permit.
    • Other local, state, and federal permits may also be required.
    • A final elevation certificate is required for locations in flood zones A and V; the county page states there are no exceptions.

    permit commencement deadline: 6 months (permit expires if work has not commenced within six months or by the permit's stated expiration date) · floodway encroachment: prohibited unless hydrologic and hydraulic analysis demonstrates no increase in flood levels during the base flood

    “Any party undertaking development within the unincorporated areas of San Patricio County must obtain a floodplain development permit prior to the work commencing.”
  • Permit feesPublished (with conditions)

    San Patricio County floodplain development and permitting fees for development in unincorporated areas.

    • The fee schedule states that all permit fees double for construction started before obtaining a permit, including minimum and maximum fees.
    • The fee schedule states that violating the Flood Damage Prevention Order is a misdemeanor and may result in a fine up to $500.00 for each violation plus associated costs.
    • Residential fees vary by flood zone and project type; for example, the schedule lists a $275.00 base permit fee plus $0.05 per square foot of enclosed area for a new single-family home in a flood zone, and $175.00 plus $0.05 per square foot in a non-flood zone.
    • The residential permitting information states that fees are non-refundable and that the schedule may change when ordered by the Commissioners Court or when codes are updated.

    new single-family home base permit fee in flood zone: 275 USD (plus $0.05 per square foot of enclosed area) · new single-family home base permit fee in non-flood zone: 175 USD (plus $0.05 per square foot of enclosed area) · septic only new or replacement fee: $50.00 + Environmental Process USD · one-year permit renewal: 75% of original permit fee · six-month permit renewal: 50% of original permit fee

    “SAN PATRICIO COUNTY FLOODPLAIN DEVELOPMENT & PERMITTING FEE SCHEDULE ALL permit fees double for any construction that is started prior to obtaining a permit, including minimum and maximum fees.”
  • Permit processPublished (with conditions)

    Residential development permitting and related subdivision/development review administered by San Patricio County Floodplain Management.

    • Submit an online application and supporting documents to the Floodplain Manager.
    • Required residential documents include a completed application, property or warranty deed with legal description, house plans and site plan, total project value affidavit, elevation certificate, and, when applicable, a no-rise certificate for a project in a floodway.
    • Plans should be submitted at least two weeks before application review.
    • Work may not begin until all reviews of plans, studies, and the application are completed and approved.
    • Payment is by check, money order, or cashier's check; credit cards are not accepted.
    • For subdivision applications, the plan-review fee is determined after the application and draft plat are received; the County Engineer reviews the project, other departments may review it, and the approved plat goes to Commissioners Court.
    • All permit fees double for projects started before obtaining a development permit.

    minimum plan submission lead time: >= 2 weeks (before application review) · credit card payment: false (check, money order, or cashier's check accepted)

    “Online application and supporting documents to the Floodplain Manager. Once all items are received, the application will be reviewed and any outstanding documents will be requested.”
  • County-wide zoningAbsent

    Texas counties lack zoning authority in unincorporated areas; the county regulates via subdivision and floodplain rules rather than zoning.

    San Patricio County Subdivision Rules ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • Owner-builder exemptionConditional

    An owner performing electrical, plumbing, or air-conditioning and refrigeration work on the owner's own residence or homestead in Texas.

    • Electrical work is exempt from state electrician licensing when performed on a dwelling the person owns and resides in.
    • Plumbing is exempt from state plumbing licensing when performed by the property owner in the property owner's homestead.
    • Air-conditioning and refrigeration contracting is exempt from the applicable state registration requirements when performed in a building owned solely by the person as the person's home.
    • These exemptions do not establish a blanket exemption for every construction trade or contractor-regulated activity.
    “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed as electricians.”
    One more reviewed finding on this topic
    • Conditional — Electrical work on a dwelling owned and occupied by the property owner in Texas.
      “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed”
  • Septic permitRequired

    Construction, installation, alteration, extension, repair, and operation of OSSFs in Texas, subject to stated exemptions and local requirements.

    • A permit and approved plan are required for construction, alteration, repair, extension, and operation of an OSSF.
    • A permit is generally required to construct, install, alter, extend, or repair an OSSF.
    • A local permitting authority must be checked because local programs may be more stringent than state minimums.
    • The 10-acre exemption requires compliance with 30 TAC Chapter 285 planning, construction, and installation standards; a site evaluation by a TCEQ-licensed site evaluator or professional engineer; service to a single-family dwelling on a tract of at least 10 acres; no nuisance or groundwater pollution; all OSSF parts at least 100 feet from the property line; on-site effluent disposal; and the single-family dwelling must be the only dwelling on the tract.
    • Emergency repairs listed by TCEQ do not require a permit but must be reported to the permitting authority in writing within 72 hours after repairs begin.
    • Grandfathered systems may be exempt if installed before the local program was authorized or before September 1, 1989, whichever is earlier, and if they are not creating a nuisance, are not in need of repair, and have had no significant increase in use or other alteration.
    • The permitting authority must approve or deny planning materials and the permit application within 30 days of receipt.

    minimum tract size for 10-acre exemption: >= 10 acres (single-family dwelling and all other stated conditions must be met) · minimum OSSF setback under 10-acre exemption: >= 100 feet from property line (all parts of the OSSF) · emergency repair reporting deadline: <= 72 hours (after repairs have begun) · permit application decision deadline: <= 30 days (from receipt by permitting authority)

    “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    2 more reviewed findings on this topic
    • Required — OSSFs, including septic systems, located in Texas, including San Patricio County, subject to local permitting programs and stated exceptions.
      “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    • Required — Construction, installation, alteration, extension, or repair of an OSSF in Texas
      “A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
  • county zoning authorityLimited

    Texas counties adopting zoning regulations for specified unincorporated or otherwise specially defined areas.

    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    • Other Chapter 231 subchapters address special areas including the Amistad Recreation Area in Val Verde County, military zones, certain lakes, the El Paso Mission Trail Historical Area, Lake Somerville, and Falcon Lake in Zapata County.
    • The cited statute was enacted effective September 1, 1987; the Falcon Lake subchapter was added effective June 15, 2007, and amended effective September 1, 2009.

    Padre Island distance from publicly owned park or recreational development: <= 2 miles (Area must be outside a municipality and in Cameron or Willacy County.) · Padre Island distance from beach, wharf, or bathhouse: <= 2 miles (The beach, wharf, or bathhouse must be used by at least 500 persons annually.)

    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
    One more reviewed finding on this topic
    • Limited — County zoning authority over unincorporated land in Texas, where a specific statutory grant applies.
      “As you suggest, a county has very limited and specific zoning authority, and none that may be used to regulate construction or operation of the proposed facility.”
  • county building authorityLimited

    Texas counties adopting and enforcing fire-code building permits for specified buildings in unincorporated areas and applying residential building-code standards in certain counties.

    • Under Section 233.061, the county must have a population over 250,000 or be adjacent to a county with a population over 250,000.
    • Under Section 233.062, the fire code applies only to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units constructed in an unincorporated area.
    • The fire code does not apply to an industrial facility having a fire brigade that conforms to Occupational Health and Safety Administration requirements.
    • A covered applicant must submit a plan and a commissioners-court-set application fee; the county must issue or deny the permit within 30 days, and failure to act within 30 days approves the construction for purposes of the subchapter.
    • The fire code must conform to the International Fire Code or Uniform Fire Code as those codes existed on May 1, 2005, or establish protective measures exceeding those standards; later editions may be adopted.
    • Residential standards under Section 233.152 apply only if the county adopts a resolution or order and the county is within 50 miles of an international border or has a population over 100.
    • Those residential standards apply only to new single-family-house or duplex construction beginning after September 1, 2009; manufactured or modular structures governed by Occupations Code Chapters 1201 or 1202 are excluded from the definition of new residential construction.
    • A municipality's building code controls in its extraterritorial jurisdiction, and Section 233.152 does not authorize county prior approval of new residential construction or county zoning regulations.
    • Fire-code inspection and permit fees may be charged under a fee schedule based on building type, limited to amounts necessary to administer and enforce the subchapter; inspection fees must be reasonable and reflect approximate inspection costs.

    county population threshold for fire-code authority: > 250000 persons (A county adjacent to a county over 250,000 also qualifies.) · multifamily residential dwelling threshold: >= 4 units (The fire code applies only to covered buildings constructed in an unincorporated area.) · residential-code border distance: <= 50 miles (Alternative qualification is county population over 100.) · application decision period: 30 days (If the commissioners court does not issue or deny the permit within 30 days after receiving the application and fee, construction is approved for purposes of the subchapter.) · residential standards effective construction date: > 2009-09-01 (Applies only to new residential construction that begins after September 1, 2009.)

    “The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code. [...] The fire code applies only to the following buildings constructed in an unincorporated area of the county: (1) a commercial establishment; (2) a public building; and (3) a multifamily residential dwelling consisting of four or more units.”
    One more reviewed finding on this topic
    • Limited — County fire-code adoption and building-permit authority for specified buildings in unincorporated areas of qualifying Texas counties, including multifamily residential dwellings of four or more units.
      “The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code.”

Inside cities and towns in San Patricio County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

  • Building code adoptedAdopted (with conditions)

    Building-code adoption within the City of Portland, San Patricio County, Texas.

    • The official city page states that Ordinance 2307 adopted the 2021 ICC building codes and 2020 NEC.
    • The codes went into effect on July 1, 2025.
    • The city page lists adopted amendments for the 2021 IEBC, IMC, ISPSC, IBC, IFGC, IPC, IFC, IRC, and 2020 NEC.

    adopted building-code edition: 2021 ICC building codes (The page separately identifies the 2020 NEC.) · effective date: 2025-07-01

    “City Council adopted Ordinance 2307 [...] adopted the 2021 ICC building codes and 202 NEC.”
  • Local zoningPresent (with conditions)

    Zoning administration by the City of Sinton within the municipality; the City's planning and zoning commission also reviews platting or subdividing within the city and adjacent areas as permitted by law.

    • The Planning and Zoning Commission is appointed by the City Council and acts as an advisory body.
    • The Commission recommends zoning plans and amendments to the City Council for adoption.
    • The official zoning map is available at City Hall and the City of Sinton Zoning District Map is available.
    “The Commission makes and recommends to the Council for adoption, a zoning plan and amendments thereto; and performs such other duties and are vested with such other powers as the council may prescribe in accordance with the laws of the State of Texas. The Official Zoning Map is available at City Hall. The City of Sinton Zoning District Map is available as well.”
    2 more reviewed findings on this topic
    • Present (with conditions) — Zoning within the City of Portland, Texas.
      “This section coordinates pre-submittal meetings, administers the zoning and regulates the platting process.”
    • Present (with conditions) — Planning and zoning commission and board of adjustment provisions under the City of Ingleside charter.
      “Shall Article X, Sections 10.02 and 10.06 of the City Charter be amended to prohibit members of the Planning and Zoning Commission and members of the Board of Adjustment from being a city employee, or hold another elected or appointed city office?”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Short-term rentals — Short-term rental use in San Patricio County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in San Patricio County, Texas

Is San Patricio County a good place to live off-grid or homestead?

San Patricio County scores 42/100 on the Bolthole Index, a marginal county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: workable self-sufficiency basics (31.8″/yr rainfall) and about 184,772 people within a 30-minute drive.

Do you need a building permit in San Patricio County, Texas?

San Patricio County requires a building permit only in limited cases (such as floodplains or specific zones), and it has no county-wide zoning. Onsite septic is permitted by San Patricio County (OSSF Order, TCEQ authorized agent). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in San Patricio County?

Living in an RV on your own land in San Patricio County is allowed: Unincorporated San Patricio County: no county rule sets this, because San Patricio County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing sanpatriciocountytx.gov. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in San Patricio County, Texas?

Land in San Patricio County runs about $3,388 per acre, based on the latest county data.

What is the water situation in San Patricio County?

San Patricio County gets about 31.8" of rain a year, with severe drought in roughly 23.3% of years.

How remote is San Patricio County?

A representative private-land location has about 184,772 people within a 30-minute drive and 788,069 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How San Patricio compares in Texas

Compare side-by-side →See all 254 Texas counties ranked →