Bolthole Index

Duval County, Texas

Building permits, zoning and land rules in Duval County, Texas

59Index Score / 100
#98 of 254 in Texas

Unincorporated Duval County, Texas does not require a county building permit for a home, barn or shed, and the county has no zoning ordinance12. Because Texas gives counties no general zoning power here, Duval County also sets no county rule on setbacks, lot size, building height, accessory dwelling units, RVs, tiny homes or manufactured homes on unincorporated land3. Duval County is TCEQ's authorized agent for septic permits countywide, but owner installation depends on the county's local OSSF requirements45. Start with the County Judge's office to find the right septic contact6.

At a glance

Building permit
Not required in unincorporated Duval County1
Zoning
No county zoning; Texas gives counties no general zoning power here2
Setbacks, lot size & building height
No county rule set on any of these3
RV, tiny home & manufactured home living
Not restricted by county zoning (Duval County has none)3
Accessory dwelling units
Not restricted by county zoning3
Septic permits
Duval County is the authorized agent; owner-installation depends on local approval45
Well permits
Operating permit required for non-exempt wells in the county's groundwater district7
State-highway driveway permit
Required from TxDOT (Form 1058) before connecting to a state highway89

Who to call

Also useful

Duval County 9-1-1 Addressing

Assigns the official 9-1-1 address every new home or structure needs before emergency responders, mail and most utility or septic hookups can use it

(361) 279-6375

401 E. Gravis, San Diego, TX 78384

Also useful

Duval County Judge's Office

General county contact point; the practical starting place for septic (OSSF), building, zoning, floodplain and road questions since Duval County lists no separate department for any of them

(361) 279-6208

Duval County Courthouse, 400 E Gravis, San Diego, TX 78384

Roads & driveways

Duval County Commissioners Court

County road, right-of-way and driveway/entrance matters on county roads, handled through the Commissioners Court and the elected commissioner and road shop for each of the county's four precincts

(361) 279-6208

Duval County Courthouse, 400 E Gravis, San Diego, TX 78384

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Duval 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 Duval County, Texas?

Unincorporated Duval County, Texas does not require a county building permit for a house, barn or shed1. Texas counties only get building-permit authority from specific state statutes, and the fire-code option under Local Government Code Chapter 233 only opens once a county's population passes 250,000 or the county borders one that has; Duval County's population is about 9,604, far under that threshold1011. A separate residential-construction-standards option exists under the same chapter, but only if a county's commissioners court adopts a resolution opting in; we could not confirm that Duval County adopted one10. Duval County publishes a $1,000 non-refundable fee for tax-abatement applications, not for an ordinary building or development permit, and professional or consulting costs may also apply to an abatement agreement12. Manufactured and industrialized housing still carries separate state-level manufacturing rules13.

Who handles septic, addressing and road questions in Duval County?

Duval County's official website lists no building, zoning, planning or dedicated environmental department for unincorporated land12. We could not confirm whether the cities of San Diego, Freer or Benavides run their own building permits or zoning, so ask the city before buying inside city limits; septic permits for the whole county still come through the county's OSSF program4. Duval County is TCEQ's authorized agent for septic (OSSF) permits countywide, but the county's own website does not name a separate septic or environmental office, so the practical starting point is the County Judge's office, which can direct you to the right department46. Before you build, get your official 9-1-1 address assigned through the county's 9-1-1 Addressing office, since emergency responders, mail and most utility or septic hookups depend on it14. Road, right-of-way and driveway matters on county roads run through the Commissioners Court and the elected commissioner and road shop for each of the county's four precincts15. Duval County's tax-abatement guidelines require a county driveway permit when an abatement project is accessed directly by a county road, though we could not confirm a driveway permit rule for ordinary homesites16. For a driveway onto a state highway instead of a county road, contact the local TxDOT district office directly8.

Does Duval County have zoning?

Duval County has no zoning ordinance for its unincorporated area, and Texas law gives counties zoning power only for specific, narrowly defined situations that do not include ordinary rural land in Duval County23. Because the county has no zoning authority here, it sets no rule on minimum dwelling size, minimum lot size, setbacks, lot coverage or building height, and it does not restrict accessory dwelling units, RVs, tiny homes, manufactured homes or temporary camping on unincorporated land3. Those land uses are unrestricted by county zoning because Texas law does not give Duval County general zoning power3. Manufactured and industrialized housing still has to be built at the factory to Texas's state-adopted code editions, a rule that took effect in 2024 and is separate from any county land-use restriction13.

How do septic permits work in Duval County?

Duval County is TCEQ's authorized agent for septic (OSSF) permitting and administration countywide; the county reviews applications, conducts inspections and investigates complaints4. Texas requires a permit to construct, install, alter, extend or repair an OSSF anywhere in the state, including Duval County, unless a specific exemption applies17. The 10-acre exemption can apply only if a licensed site evaluator or engineer confirms the tract has at least 10 acres, the home is its only dwelling, every system component is at least 100 feet from the property line, effluent stays onsite, and the system creates no nuisance or groundwater pollution17. About 42.1% of Duval County's soils are free of severe limitations for a conventional drain field, so a parcel-specific site evaluation matters18. An owner may install or repair an OSSF for the owner's single-family dwelling only if Duval County allows it locally, the property is not being developed for sale or lease, the owner has the necessary ability and equipment, and any helper is properly licensed except for narrow electrical and tank-delivery exceptions5. The site evaluation still must be performed by a current site evaluator or professional engineer5.

Can you live in an RV, tiny home or manufactured home on your land in Duval County?

Duval County has no zoning ordinance and no zoning authority over unincorporated land, so it does not restrict living in an RV, a tiny home or a manufactured home there, and it does not set a minimum dwelling size32. Texas law limits county zoning power to specific situations that do not apply to ordinary unincorporated land in Duval County3. A manufactured or industrialized home still has to be built at the factory to Texas's state-adopted code editions, a requirement that took effect in 2024 and is separate from county land-use restrictions13. Whatever you live in, get a 9-1-1 address and plan wastewater disposal through Duval County's countywide OSSF program144. If you plan to drill a well, check the Duval County Groundwater Conservation District's rules first; a non-exempt well needs an operating permit7.

Building a home in Duval County: the steps, in order

  1. Get your official 9-1-1 address assigned through Duval County's 9-1-1 Addressing office before you do much else; emergency responders, mail and most hookups depend on it14.
  2. Call the County Judge's office to confirm which county department to work with, since Duval County lists no separate building, zoning or environmental office on its website6.
  3. Start OSSF (septic) planning early with Duval County's countywide authorized-agent program; about 42.1% of the county's soils are free of severe septic limitations, so a site evaluation will tell you where you stand418.
  4. If your tract is 10 acres or more and will hold a single dwelling, ask about the state's 10-acre exemption from OSSF permitting before you assume you need a full permit17.
  5. Ask Duval County whether it allows owner installation before planning to install the OSSF yourself; state rules make local approval a condition5.
  6. If you plan to drill a well, check with the Duval County Groundwater Conservation District; a non-exempt well needs an operating permit, and a proposed well must be registered and drilled within 180 days of approval or the registration becomes void7.
  7. For a state-highway driveway, submit Form 1058 to TxDOT before work; for a county-road entrance, call the Commissioners Court for your precinct's road shop915.

What to check before you buy land in Duval County

Duval County sits about 60 miles from the nearest city of 100,000 or more and has roughly 5.4 people per square mile, so expect long drives for services1920. About 33.4% of the county is wooded and 99.9% of land sits at 15% slope or less2122. About 42.1% of Duval County's soils are free of severe limitations for a conventional septic drain field, but a site evaluation must answer for the parcel18. If you plan to drill a well, check the Duval County Groundwater Conservation District first; a non-exempt well needs an operating permit and must generally sit at least 100 feet from the property line7. Dividing a tract is its own question: a landowner outside municipal limits who divides a tract into two or more parts to lay out a subdivision, lots or streets must have a plat prepared, subject to statutory exceptions23. A tract used primarily for agricultural, farm, ranch, wildlife-management or timber use can be divided without a plat if no streets are laid out, but septic, drainage, road and floodplain requirements still apply24. Typical property taxes run about 1.1% of value, with a median annual bill near $931, and a typical home insurance premium runs about $1,979 a year252627. Ask the County Judge's office about floodplain requirements for a parcel near a creek or drainage; Duval County has managed a drainage project within a federally identified floodplain, but we could not confirm a general county floodplain-development rule628.

Watch-outs

  • Duval County's no-permit, no-zoning answer rests on the absence of a building or zoning department on the county's own website, not on a specific ordinance we could read; call the County Judge's office to confirm before you buy21.
  • We could not confirm a Duval County certificate-of-occupancy rule, short-term-rental rule, or a general countywide public-water/sewer connection requirement; each is genuinely unconfirmed rather than absent, so ask the County Judge's office about your specific parcel6.
  • A driveway permit is confirmed for connections onto the Texas state highway system through TxDOT, and for county-road access to abatement projects; for an ordinary driveway onto a county road, ask the Commissioners Court and your precinct's road shop816.
  • We could not confirm whether San Diego, Freer or Benavides adopt zoning or require building permits inside city limits; ask the city, and ask the County Judge's office about the unincorporated area6.

Sources

  1. Duval County, Texas - Official County Website (2026 county census)
  2. Duval County, Texas - Official County Website (2026 county census)
  3. Texas law on county zoning and building authority
  4. Types of Systems Installed by Time Period — 2024 Authorized Agent Report, quoted and re-checked
  5. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  6. Duval County Judge's Office (co.duval.tx.us)
  7. Duval County Groundwater Conservation District Management Plan 2023, quoted and re-checked
  8. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  9. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  10. Local Government Code Chapter 233, County Regulation of Housing and Other Structures (Texas statewide rule), quoted and re-checked
  11. County population: Bolthole Index county data
  12. Tax Abatement Guidelines and Criteria as Amended, quoted and re-checked
  13. Industrialized Housing and Buildings – Adoption of New Code Editions (Texas statewide rule), quoted and re-checked
  14. Duval County 9-1-1 Addressing (co.duval.tx.us)
  15. Duval County Commissioners Court (co.duval.tx.us)
  16. Tax Abatement Guidelines and Criteria as Amended, quoted and re-checked
  17. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
  18. 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
  19. Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
  20. Population density: Bolthole Index county data
  21. Wooded share of land: Bolthole Index county data
  22. Share of land at 15% slope or less: Bolthole Index county data
  23. Texas Local Government Code, Chapter 232, quoted and re-checked
  24. Texas Local Government Code, Chapter 232, quoted and re-checked
  25. Effective property tax rate: Bolthole Index county data
  26. Median property tax bill: Bolthole Index county data
  27. Typical home insurance premium: Bolthole Index county data
  28. Early Notice and Public Review of a Proposed Activity in a Federal Flood Risk Management Standard Designated Floodplain, quoted and re-checked

Written October 10, 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, Duval County has no countywide zoning.

RuleDuval CountyJim Wells CountyJim Hogg CountyWebb CountyMcMullen CountyLive Oak CountyKleberg County
Building permitNot requiredNot requiredNot requiredRequiredLimitedNot requiredNot required
County zoningNoNoNoNoNoNoNo
Septic permitsDuval CountyCounty Safety & Inspection Dept.Jim Hogg CountyCounty Planning Dept.McMullen CountyLive Oak CountyCity of Kingsville Env. Health

County locator

Duval County in Texas

59
County map
Duval County highlighted among the Texas counties · colored by Index score

How Duval County scores

Seclusion83100% ev.
Self-Sufficiency2996% ev.
Admin Boringness86100% ev.
Durability33100% ev.
Property Autonomy71100% ev.
Carry Cost81100% ev.

Evidence strength: 99%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$84kTypical home
1.1%Property tax
$1,532Land / acre
24"Annual rain
21.8% of yrsSevere drought
63.2 / yr (+40.8)Mid-century 100°F days
34.1 daysMid-century dry spell
2.15" (+7.2%)Mid-century 1-day rain
1.35×Wildfire change factor
100%Forward climate coverage
$1,979Home insurance / yr
0% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,991People within 30 min
834,396People within 2 hr
4,463Radius comparison (15 mi)
5.4People / sq mi
0%Federal land
99.9%Land at 15% slope or less
42.1%Soils rated "not limited" for septic (strict USDA rating)
478,971 acWorkable land screen
33.4%Wooded land
3.6 tonsBiomass / forest ac
72.7°FAvg temp

Scout Duval 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 Duval 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 Duval 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.

Benavides · Freer · San Diego

Answers from the rulebook for Duval County

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

Duval County rules

  • Zoning districts · by state lawNo county rule

    Unincorporated Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 land · by state lawNo county rule

    Unincorporated Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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.”
  • Tiny homes · by state lawNo county rule

    Unincorporated Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 homes · by state lawNo county rule

    Unincorporated Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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.”
  • Accessory dwellings · by state lawNo county rule

    Unincorporated Duval County: no county rule sets this, because Duval 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 co.duval.tx.us.

    • 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 (with conditions)

    On-site sewage facility permitting and administration identified for Duval County in TCEQ authorized-agent reporting.

    • The county acts under Texas Health and Safety Code Chapter 366 and 30 TAC Chapter 285.
    • The authorized agent reviews OSSF permit applications, conducts inspections, investigates complaints, and performs related program administration.
    • TCEQ's 2024 report lists Duval County in the Authorized Agent table; the report excerpt does not specify a more limited geographic service area.
    • TCEQ identifies Duval County as being in Region 16, Laredo.

    OSSF monthly fee accounted for by authorized agent: 10 USD

    “DUVAL COUNTY (DUVAL) 620312 21 0 0 0 11 6 4 0 0 0 0 0 0”
  • Well permitLimited

    Proposed and existing non-exempt groundwater wells within the jurisdiction of the Duval County Groundwater Conservation District.

    • All non-exempt wells require an operating permit.
    • A proposed non-exempt well may not be drilled, operated, or produce water unless the operating permit has been obtained.
    • Proposed wells must be registered and satisfy applicable spacing requirements or obtain an approved variance or waiver.
    • If no operating permit is required, approved registration and the Well Registration Certificate authorize drilling and operating as described in the registration.
    • A registration becomes void if the well has not been drilled within 180 days after approval and issuance of the certificate.
    • An existing non-exempt well must have an operating-permit application submitted within 90 days after District approval of the registration application.

    registration validity period: 180 days (if the proposed well has not been drilled, registration and certificate become void) · existing non-exempt well operating-permit application deadline: <= 90 days (after District approval of registration application) · minimum proposed-well distance from property line: >= 100 feet (unless a more stringent applicable requirement or approved variance applies)

    “Operating Permits are required for all Non-Exempt Wells. This requirement applies to Proposed and Existing Wells.”
  • Driveway accessRequired

    A project governed by Duval County's tax-abatement guidelines when the project is accessed directly by a County Road.

    • The County driveway permit requirement applies when the project is accessed directly by a County Road.
    • The project owner is wholly responsible for County roads and right-of-way, including bridges, culverts, and ditches, and for damage caused by construction or ongoing maintenance and operations.
    • Road maintenance costs may be tracked by Duval County and invoiced regularly to the owner.
    • Road reconstruction costs incurred by the County, including construction and related professional services, may be invoiced to the owner.
    • The owner must promptly submit a completed County driveway permit application.
    “a County driveway permit, which shall be required in the event the project is accessed directly by a County Road.”
  • Building in a floodplainLimited

    The Duval County Community Development Block Grant sewer and drainage improvements project identified as ERR CFC24-0103, including work near Cadena Loop and specified lift stations, where the County determined the proposed action is in the FFRMS floodplain.

    • The project is administered under the Community Development Block Grant Program by the Texas Department of Agriculture.
    • Duval County will identify and evaluate practicable alternatives to locating the action in the floodplain and potential impacts on the floodplain.
    • The notice states that the process is required by Executive Order 11988, as amended by Executive Order 13690, and HUD regulations at 24 CFR 55.20 Subpart C.
    • The FEMA FIRM panels identified for the project are 48131C0425C and 48131C0600C, effective February 4, 2011.
    • The proposed project affects approximately 0.28 acres of the FFRMS floodplain.
    • Written comments were due by February 13, 2026.

    affected FFRMS floodplain area: 0.28 acres · FIRM effective date: 2011-02-04 · public-comment deadline: 2026-02-13

    “According to FEMA, Flood Insurance Rate Map (FIRM) Panels No. 48131C0425C and 48131C0600C effective February 4, 2011, the proposed project is within approximately .28 acres of the FFRMS Floodplain.”
  • Permit feesPublished (with conditions)

    Duval County tax-abatement applications for creation of a reinvestment zone or tax abatement.

    • The fee is for a tax-abatement application, not a general building or development permit.
    • The application fee is non-refundable.
    • Additional reasonable professional service and consulting fees may be required as a condition precedent to execution of the abatement agreement.
    • The County may request additional information or data from the applicant.

    application fee: 1000 USD (non-refundable) · professional service and consulting fees: variable USD (determined during negotiation and payable as a condition precedent to execution of the tax-abatement agreement)

    “8. A $1,000.00 non-refundable application fee.”
  • Permit processPublished (with conditions)

    Duval County tax-abatement applications for eligible projects and facilities.

    • The application must be submitted before construction begins to qualify for tax abatement.
    • The applicant must acknowledge familiarity with and assume conformance with the County's Tax Abatement Guidelines and Criteria.
    • Knowingly false representations may void a later agreement or contract.
    • A $1,000 non-refundable application fee is required for each application.
    • The signed original, supporting documents, and two copies must be returned to the Duval County Judge at 400 E. Gravis Avenue, San Diego, Texas 78384.
    • Property must be secured through lease or purchase before court consideration for a reinvestment zone.

    application fee: 1000 USD (non-refundable; per application)

    “This application must be submitted before any construction begins [...] There is a one thousand dollar ($1,000.00) non-refundable application fee for each application filed.”
  • County-wide zoningAbsent

    Texas counties lack general zoning authority in unincorporated areas and Duval County lists no planning/zoning department.

    Duval County, Texas - Official County Website ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • Building permitLimited

    Industrialized housing or buildings installed in Texas, including purchasers or lessees acquiring a unit for their own or their company’s use.

    • A person purchasing or leasing an industrialized house or building for their own use or their company’s use may file for an installation permit instead of registering as an industrialized builder.
    • A person responsible for assembly, connection, and on-site construction for persons other than themselves must be registered as an industrialized builder.
    • Municipalities may require applicable local permits and licenses before construction begins when the municipality regulates the installation.
    “A person who is a retailer of industrialized housing or buildings, or who is responsible for the assembly, connection, and on-site construction and erection of an industrialized house or building for persons other than themselves, must be registered as an industrialized builder. Subcontractors do not require the registration unless required by other applicable state laws. For example, electricians, HVAC contractors, and plumbers must be licensed in accordance with the applicable state law. If you are purchasing or leasing an industrialized house or building for your own use, or your company's use, you may file for an installation permit in lieu of registering as an industrialized builder.”
  • Owner-builder exemptionConditional

    An owner installing or repairing an OSSF serving the owner's single-family dwelling on the owner's property in Duval County, Texas.

    • The permitting authority must allow owner installation under its local requirements.
    • The owner must have the knowledge, skills, and equipment to perform the work.
    • The OSSF must serve a single-family dwelling that the owner owns, and the owner must also own the property.
    • No part of the property may be developed for sale or lease.
    • The owner must satisfy all permitting, construction, and maintenance requirements of the permitting authority.
    • Some systems cannot be purchased by a homeowner because they must be installed by a factory representative.
    • If another person assists during any phase of installation, that person must be a licensed installer of the correct level, except for a licensed electrician installing electrical components or a person delivering a treatment or pump tank and setting the tank or tanks into an excavation.
    • Under 30 TAC §30.244, the site evaluation must be performed by a current site evaluator or professional engineer.
    • Local permitting programs may be more stringent than state minimums.
    “This depends on whether the permitting authority allows this in their local requirements.”
    3 more reviewed findings on this topic
    • Conditional — An individual building covered new residential construction in a county to which Texas Local Government Code Chapter 233, Subchapter F applies.
      “An individual who fails to provide proper notice in accordance with Sections 233.154(b) and (c) is not subject to a penalty under this subsection if: (1) the new residential construction is built by the individual or the individual acts as the individual's own contractor; and (2) the individual intends to use the residence as the individual's primary residence.”
    • Conditional — An owner performing electrical, plumbing, or air-conditioning and refrigeration work on the owner's own residence or homestead 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 as electricians.”
    • 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”
  • Building code adoptedPartial

    Industrialized housing and buildings, modules, and modular components governed by the Texas Industrialized Housing and Buildings program.

    • The mandatory state code adoption applies to industrialized housing and buildings, modules, and modular components, not all construction statewide.
    • The effective date is July 1, 2024.
    • The International Existing Building Code applies to alterations of portable industrialized buildings.
    • Manufacturers already certified for Texas must have design-package documents reviewed and approved to the new editions with an approval date on or after July 1, 2024, unless the manufacturer elected to transition before the effective date under Department rule 70.70(a)(5)(B).
    • Construction begun on or after July 1, 2024 must comply with the new code editions and approved design packages.
    • Construction begun before July 1, 2024, or before a manufacturer's effective transition date, must meet the stated completion, inspection, and labeling deadline to remain eligible for a Texas decal.

    effective date: 2024-07-01 · International Building Code: 2021 Edition (including appendices C, F, and K) · International Residential Code: 2021 Edition (including appendices AG, AH, AK, AP, AQ, and AT) · International Fuel Gas Code: 2021 Edition · International Mechanical Code: 2021 Edition · International Plumbing Code: 2021 Edition · International Energy Conservation Code: 2015 Edition · National Electrical Code: 2020 Edition · International Existing Building Code: 2021 Edition (for alterations of portable industrialized buildings)

    “July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
    2 more reviewed findings on this topic
    • Adopted (with conditions) — Minimum Texas energy-code requirements for single-family homes and applicable residences, commercial, and industrial buildings, including buildings in Duval County
      “The applicable code for other residences and commercial and industrial buildings is the 2015 International Energy Conservation Code. These energy codes are effective statewide.”
    • Partial — Industrialized housing and buildings, modules, and modular components built for Texas under the Industrialized Housing and Buildings program.
      “Effective July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
  • 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.”
    One more reviewed finding on this topic
    • 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”:”
  • Septic inspectionLimited

    OSSF installation and, where applicable, maintenance inspections in Texas

    • Authorized agents or their designated representatives inspect system installation.
    • Some permitting authorities impose more stringent requirements.
    • Maintenance-provider inspection and reporting requirements apply to systems and circumstances governed by 30 TAC §285.91(4).
    • Electronic monitoring may reduce reporting to every six months where the stated monitoring conditions apply.

    reduced maintenance reporting interval with qualifying electronic monitoring: 6 months (only where the system uses the specified electronic monitoring, automatic notification, and disinfection monitoring)

    “Many times, the AA has a "designated representative" (DR) to assist them with their responsibilities, which include reviewing plans for constructing, altering, extending or repairing each OSSF; issuing permits; and inspecting system installation. [...] If the system uses an electronic monitor, automatic radio or telephone to notify the maintenance provider of system or component failure and to monitor the amount of disinfection in the system, reporting may be reduced to every six months.”
    One more reviewed finding on this topic
    • Limited — OSSFs using secondary treatment or drip irrigation in Texas.
      “A system using secondary treatment or drip irrigation must be inspected by a valid maintenance company once every four months, or be maintained by the single family homeowner, where allowed.”
  • Off-grid sanitationLimited

    Off-grid wastewater sanitation through an OSSF in Texas.

    • An OSSF generally requires a permit and approved plan before construction, installation, alteration, extension, repair, or operation.
    • A qualifying single-family dwelling on a tract of at least 10 acres may use the 10-acre permitting exemption only if every stated site-evaluation, setback, nuisance, groundwater, on-site disposal, and single-dwelling condition is met.
    • Local permitting authorities may impose requirements more stringent than state minimums.
    • Emergency repairs are exempt from permitting only for the listed repair types and must be reported in writing within 72 hours after repairs begin.

    10-acre exemption tract size: >= 10 acres (all TCEQ conditions must be satisfied) · 10-acre exemption OSSF setback: >= 100 feet from property line (all parts of the 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”:”
    One more reviewed finding on this topic
    • Limited — Composting toilets used as on-site sewage facility treatment systems in Texas.
      “Composting toilets will be approved by the executive director provided the system has been tested and certified under NSF International Standard 41 (1999) or under any other standards approved by the executive director.”
  • Agricultural exemptionAvailable (with conditions)

    A tract outside municipal limits in Texas, including unincorporated Duval County, divided into two or more parts without laying out streets, alleys, squares, parks, or other parts intended for public use, when the land is to be used primarily for agricultural, farm, ranch, wildlife-management, or timber-production purposes.

    • The owner must not lay out a part of the tract described by Texas Local Government Code Section 232.001(a)(3).
    • The land must be used primarily for agricultural use as defined by Article VIII, Section 1-d of the Texas Constitution, or for farm, ranch, wildlife-management, or timber-production use within the meaning of Article VIII, Section 1-d-1.
    • If the tract ceases to be used primarily for the qualifying uses, the platting requirements apply.
    • This statutory exemption concerns the plat requirement; septic, wastewater, drainage, road, floodplain, and other applicable requirements may still apply.
    “(c) A county may not require the owner of a tract of land located outside the limits of a municipality who divides the tract into two or more parts to have a plat of the subdivision prepared if: (1) the owner does not lay out a part of the tract described by Section 232.001(a)(3); and (2) the land is to be used primarily for agricultural use, as defined by Section 1-d, Article VIII, Texas Constitution, or for farm, ranch, wildlife management, or timber production use within the meaning of Section 1-d-1, Article VIII, Texas Constitution. (d) If a tract described by Subsection (c) ceases to be used primarily for agricultural use or for farm, ranch, wildlife management, or timber production use, the platting requirements of this subchapter apply.”
  • Subdividing landRegulated (with conditions)

    Divisions of land outside municipal limits in Texas, including Duval County unincorporated areas, when the owner divides a tract into two or more parts to lay out a subdivision, lots, or streets, alleys, squares, parks, or other parts intended for public use.

    • The statute applies to land located outside the limits of a municipality.
    • The plat requirement is subject to the exceptions in Texas Local Government Code Section 232.0015 and other applicable subchapters.
    • Municipal and extraterritorial-jurisdiction arrangements may affect which governmental entity administers plat approval.
    • The Duval County Attorney page identifies an official Duval County Subdivision Rules and Regulations document, but the PDF's numeric standards were not extractable through the available webpage-opening interface.
    “Sec. 232.001. PLAT REQUIRED. (a) The owner of a tract of land located outside the limits of a municipality must have a plat of the subdivision prepared if the owner divides the tract into two or more parts to lay out: (1) a subdivision of the tract, including an addition; (2) lots; or (3) streets, alleys, squares, parks, or other parts of the tract intended by the owner of the tract to be dedicated to public use.”
  • 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.”

Still unanswered

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

  • Inspections — Building inspections for residential construction in unincorporated Duval County, Texas.
  • Certificate of occupancy — Certificate-of-occupancy requirements for buildings in Duval County, including unincorporated areas.
  • Local zoning — Zoning in incorporated municipalities and other local jurisdictions within Duval County.
  • Mandatory utility hookup — Connection to public water or sewer systems for property in Duval County.
  • Short-term rentals — Short-term rentals in Duval County, Texas.

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 Duval County, Texas

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

Duval County scores 59/100 on the Bolthole Index, a solid county profile. Its strengths: low administrative friction for a quiet rural property and sparse surroundings — about 1,991 people within a 30-minute drive. Watch-outs: thin water margin (24″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.

Do you need a building permit in Duval County, Texas?

Duval County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Duval County (TCEQ authorized agent for on-site sewage). 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 Duval County?

Living in an RV on your own land in Duval County is allowed: Unincorporated Duval County: no county rule sets this, because Duval 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 co.duval.tx.us. 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 Duval County, Texas?

Land in Duval County runs about $1,532 per acre, based on the latest county data.

What is the water situation in Duval County?

Duval County gets about 24" of rain a year, with severe drought in roughly 21.8% of years.

How remote is Duval County?

A representative private-land location has about 1,991 people within a 30-minute drive and 834,396 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 Duval compares in Texas

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