Bolthole Index

Galveston County, Texas

Building permits, zoning and septic rules in Galveston County, Texas

49Index Score / 100
#144 of 254 in Texas

Unincorporated Galveston County, Texas uses limited development permitting: builders subject to the county's floodplain-management process submit a Development Permit Application to the County Engineer1. New single-family homes and duplexes must meet residential code standards and undergo at least 3 inspections as applicable23. Unincorporated Galveston County has no county zoning; septic permits come from the Galveston County Health District456.

At a glance

Building permit
Limited development permitting under county floodplain regulations; do not start covered work before permit issuance17
Building code and inspections
New single-family homes and duplexes: IRC published as of May 1, 2008, or the City of Galveston version; at least 3 inspections as applicable23
Zoning
None in unincorporated Galveston County48
Septic permit
Required; issued by the Galveston County Health District as TCEQ's authorized agent569
Floodplain permit
Development Permit Application required for construction subject to the county floodplain-management process10
Minimum lot size / setbacks
No county zoning-based minimum or setback; subdivision and septic requirements still apply8119
RV, tiny home or manufactured home
No zoning-based restriction, though floodplain, inspection and septic rules still apply87129
Septic-favorable soils
About 0.4% of soils rate not limited for conventional drain fields; a site evaluation determines the system needed13

Who to call

Floodplain permits

Galveston County Engineering, Floodplain Permitting & Right-of-Way

Issues the floodplain development permit required for construction in Galveston County's mapped flood zones, and coordinates beachfront construction certificate and dune protection permit review with the Texas General Land Office

(409) 762-8621

722 Moody Avenue, Galveston, Texas 77550

Roads & driveways

Galveston County Road & Bridge Department

Issues driveway access permits for placing a culvert on a county road or right-of-way

281-534-4125

5115 Hwy 3, Dickinson, Texas 77539

Septic permits

Galveston County Health District

Permits, inspects and regulates on-site sewage facilities (septic systems) countywide as TCEQ's authorized agent

409-938-7221

9850 Emmett F. Lowry Expressway, Texas City, TX 77591

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 Galveston County means bringing your own water and power. The kit we’d start with:

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

Unincorporated Galveston County uses limited development permitting under its floodplain-management regulations; covered residential builders submit a Development Permit Application to the County Engineer1. The residential code statute itself does not require prior county approval, but the separate development-permit checklist prohibits starting covered work before permit issuance17. New single-family houses and duplexes must substantially conform to the IRC published as of May 1, 2008, or the version currently adopted by the City of Galveston; an adopted municipal code controls where applicable in a city's extraterritorial jurisdiction2. The county's IRC statement also addresses structures built or altered under its permitting process, without establishing a universal code for every building type14. Builders must hire a county-listed qualified inspector for at least 3 inspections as applicable, then submit the statement within 10 days after final inspection; the inspection report precedes release of the Certificate of Completion and electrical service3. Seabrook, listed as a city reaching into Galveston County, issues its own building permits for most construction inside city limits; septic remains with the Galveston County Health District for Galveston County addresses155.

Who handles building development applications and septic permits in Galveston County?

For unincorporated Galveston County development applications, start with the County Engineer through Engineering, Floodplain Permitting & Right-of-Way at 722 Moody Avenue, Galveston, Texas 77550, phone (409) 762-8621116. Development-permit payments can be mailed or delivered there; include the permit address or online application number when mailing a check16. A culvert on a county road or right-of-way requires a driveway access permit from Road & Bridge at 5115 Hwy 3, Dickinson, Texas 77539, phone 281-534-412517. Septic permits, inspections and maintenance agreements are administered by the Galveston County Health District, at 9850 Emmett F. Lowry Expressway, Texas City, TX 77591, phone 409-938-7221618.

Does Galveston County have zoning?

Unincorporated Galveston County has no county zoning ordinance4. Galveston County sets no zoning-based minimum lot size, setback, lot-coverage or height limit, and no zoning-based restriction on accessory dwellings, RVs, tiny homes or manufactured-home residences on unincorporated land8. Subdivision approval, development permitting, residential inspections and septic requirements still apply within their respective scopes11139. Inside League City, the city's zoning districts and permitted-use table govern land and buildings19. Seabrook, a city listed as reaching into Galveston County, also administers its own zoning inside city limits20. Septic permitting for Galveston County addresses stays with the Galveston County Health District, including inside cities5.

How do septic permits work in Galveston County?

The Galveston County Health District oversees septic permitting, installation and operation as TCEQ's authorized agent56. A valid permit and approved plan are required to construct, alter, repair, extend or operate an on-site sewage facility, and the Health District coordinates plan approval with building officials18. Texas has a conditional 10-acre exemption for a single-family dwelling, requiring a site evaluation, only one dwelling on the tract, on-site effluent disposal, no nuisance or groundwater pollution, and every system component at least 100 feet from the property line; ask the Health District about local requirements before relying on it9. Schedule installation inspections at least 24 hours ahead; a failed residential construction inspection carries a $150 re-inspection fee1821. About 0.4% of Galveston County soils rate not limited for a conventional drain field, so plan for a site evaluation and possibly an engineered system; the rating does not mean septic is impossible13.

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

For an RV or tiny home on unincorporated Galveston County land, ask Engineering, Floodplain Permitting & Right-of-Way whether the proposed placement or construction falls under the development-permit process before work begins716. A septic installation requires an approved plan and permit unless an applicable exemption is satisfied9. Mobile-home inspection exceptions depend on the flood zone: foundation and framing inspections are waived in X and shaded X zones, but only framing is waived in A and V zones; final inspection remains required before electrical release for new construction or a house move12. We could not confirm a county-specific approval path for composting toilets or holding tanks; ask the Galveston County Health District about the proposed sanitation system18.

Building a home in Galveston County: what steps should you take?

  1. Ask Engineering, Floodplain Permitting & Right-of-Way which development application and flood-zone checklist apply to the parcel11216.
  2. Submit the development application, allow up to 7 business days for initial review, and wait for issuance before starting covered work167.
  3. For septic, obtain the Health District's approved plan and permit unless an applicable exemption is confirmed189.
  4. Arrange any county-road culvert driveway access permit with Road & Bridge17.
  5. Hire a county-listed qualified inspector: foundation inspection precedes concrete placement, framing and mechanical inspection precede interior wall coverings, and final inspection follows completion3.
  6. Submit the inspection statement within 10 days after final inspection and the IRC report before the Certificate of Completion and electrical release3.
  7. For beachfront construction certificates and dune protection permits, allow for General Land Office responses of up to 10 business days, or 30 business days for large-scale development16.

What should you check before buying or subdividing land in Galveston County?

Galveston County averages about 53.7 inches of annual rain, and only about 0.4% of soils rate not limited for conventional drain fields: evaluate drainage and septic suitability before committing to a building site2213. Farmland value is around $15,245 per acre and typical home value around $321,285; these county figures are context for a parcel budget2324. A family division requires a replat, and Galveston County no longer subdivides tracts by metes and bounds11. Replats cost $500, with a separate $70 plat-map filing charge and $50 for additional plat pages25. Ask the County Engineer which new-subdivision fee applies to the proposed lot count; the published brackets overlap at 10 lots25. County Clerk filing requirements include current original tax certificates, an original Mylar plat, prescribed ink and dimensions, signatures and certificate information26. For improvements under a county-approved subdivision plat, the County Engineer inspects during and after construction, and the applicable drainage district may monitor work; missing required construction notices can prevent county acceptance and maintenance27.

Watch-outs

  • The county cannot charge a fee to enforce the residential code standards, but subdivision, plat filing and septic re-inspection charges are separate282521.
  • The owner-builder notice-penalty exception applies when someone builds or acts as contractor for their own primary residence; it does not waive development permits, code standards or all inspections29.
  • For A and V flood zones, an original finished-construction elevation certificate is required before electrical service release12.
  • We could not confirm the private-well permit requirement; ask Engineering, Floodplain Permitting & Right-of-Way which water authority covers the parcel16.

Sources

  1. Order Applying Residential Building Code Standards to Galveston County, quoted and re-checked
  2. IRC Statement, quoted and re-checked
  3. IRC Statement, quoted and re-checked
  4. Galveston County - Engineering/Floodplain Permitting (2026 county census)
  5. Environmental Health Services Fees, quoted and re-checked
  6. Environmental Health Services Fees, quoted and re-checked
  7. County of Galveston Permit Checklists, quoted and re-checked
  8. Texas law on county zoning and building authority
  9. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  10. Order Applying Residential Building Code Standards to Galveston County, quoted and re-checked
  11. Fees for New Subdivisions and Replats, quoted and re-checked
  12. County of Galveston Permit Checklists, quoted and re-checked
  13. 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
  14. galvestoncountytx.gov, quoted and re-checked
  15. Seabrook: Permits | Seabrook, TX (Galveston County), quoted and re-checked
  16. Galveston County Engineering, Floodplain Permitting & Right-of-Way (galvestoncountytx.gov)
  17. Galveston County Road & Bridge Department (galvestoncountytx.gov)
  18. Galveston County Health District (gchd.org)
  19. League City: Unified Development Code (Galveston County), quoted and re-checked
  20. Seabrook: Code of Ordinances: Provisions of the previous zoning ordinance (Galveston County), quoted and re-checked
  21. Environmental Health Services Fees, quoted and re-checked
  22. Annual precipitation: Bolthole Index county data
  23. Farmland value per acre (USDA census): Bolthole Index county data
  24. Typical home value (Zillow): Bolthole Index county data
  25. Fees for New Subdivisions and Replats, quoted and re-checked
  26. Requirements for Filing Subdivision Plat Maps, quoted and re-checked
  27. Galveston County Rules, Regulations and Requirements Relating to the Approval and Acceptance of Improvements in Subdivisions or Re-Subdivisions, quoted and re-checked
  28. Order Applying Residential Building Code Standards to Galveston County, quoted and re-checked
  29. Order Applying Residential Building Code Standards, 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.

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Compared with neighboring counties

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

RuleGalveston CountyChambers CountyBrazoria CountyHarris CountyFort Bend CountyJefferson CountyLiberty County
Building permitLimitedRequiredLimitedLimitedLimitedRequiredRequired
County zoningNoNoNoNoNoNoNo
Septic permitsCounty Health DistrictCounty Env. Health & PermittingCounty Env. Health Dept.County Office of the County EngineerCounty Env. Health Dept.County Env. ControlCounty Engineering

County locator

Galveston County in Texas

49
County map
Galveston County highlighted among the Texas counties · colored by Index score

How Galveston County scores

Seclusion28100% ev.
Self-Sufficiency3293% ev.
Admin Boringness7290% ev.
Durability59100% ev.
Property Autonomy71100% ev.
Carry Cost46100% 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 →

$321kTypical home
1.5%Property tax
$15,245Land / acre
53.7"Annual rain
12.4% of yrsSevere drought
1.6 / yr (+1.4)Mid-century 100°F days
17.8 daysMid-century dry spell
3.13" (+5.9%)Mid-century 1-day rain
1.33×Wildfire change factor
100%Forward climate coverage
$1,529Home insurance / yr
-0.8% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
38,222People within 30 min
7,861,394People within 2 hr
272,054Radius comparison (15 mi)
953.7People / sq mi
1.5%Federal land
100%Land at 15% slope or less
0.4%Soils rated "not limited" for septic (strict USDA rating)
491 acWorkable land screen
16.7%Wooded land
4.8 tonsBiomass / forest ac
70.3°FAvg temp

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Cities and towns in Galveston 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: Bayou Vista · Hitchcock · Kemah

Answers from the rulebook for Galveston County

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

Galveston County rules

  • Building permitLimited

    New residential construction subject to Galveston County's floodplain-management development-permit process.

    • The County order states that builders were already required to submit a Development Permit Application under the County's separate Flood Plain Management Regulations.
    • The requirement concerns notification and development permitting; the residential building-code statute itself does not require prior county approval before construction.
    • Municipal requirements may apply inside incorporated areas or municipal extraterritorial jurisdictions.
    “WHEREAS, as builders are presently required to submit a Development Permit Application to the County Engineer under the separate Regulations of Galveston County for Flood Plain Management”
    One more reviewed finding on this topic
    • Limited — Building, placing, repairing, or altering structures and certain development in unincorporated Galveston County, particularly county-regulated floodplain development.
      “I hereby agree with the conditions listed above and acknowledge it is a violation to begin work before a permit is issued. This is only a permit application, not a permit.”
  • Building code adoptedPartial

    New residential construction of a single-family house or duplex in unincorporated Galveston County.

    • Construction must conform to the International Residential Code published as of May 1, 2008, or the version applicable in the county seat.
    • The standards apply only to new residential construction beginning after September 1, 2009.
    • A municipal building code controls in a municipality's extraterritorial jurisdiction where adopted.
    • The County may not charge a fee to enforce these standards.

    IRC version date: May 1, 2008 (or the version applicable in the county seat) · effective date: September 1, 2009 (standards apply only to construction beginning after this date)

    “The structure to be built or altered at the above address shall be built to substantially conform to either the version of the International Residential Code published as of May 1, 2008 or the version of the International Residential Code that is currently adopted by the City of Galveston.”
    2 more reviewed findings on this topic
    • Partial — New residential construction of a single-family house or duplex in unincorporated Galveston County subject to Texas Local Government Code Chapter 233, Subchapter F.
      “New residential construction of a single-family house or duplex in the unincorporated area of a county to which this subchapter applies shall conform to the version of the International Residential Code published as of May 1, 2008, or the version of the International Residential Code that is applicable in the county seat of that county.”
    • Partial — Structures built or altered under the Galveston County permitting process.
      “The structure to be built or altered at the above address shall be built to substantially conform to either the version of the International Residential Code published as of May 1, 2008 or the version of the International Residential Code that is currently adopted by the City of Galveston.”
  • InspectionsRequired

    New construction or alteration subject to the County IRC statement.

    • A minimum of three inspections are performed as applicable: foundation before concrete placement, framing and mechanical systems before interior wall coverings, and completion of construction.
    • The builder must contract with one of the listed qualified inspectors.
    • A statement must be submitted no more than 10 days after final inspection.
    • The IRC inspection report must be uploaded or emailed before release of the Certificate of Completion and electrical service.

    minimum inspections: >= 3 inspections (as applicable) · post-final-inspection submission deadline: <= 10 days

    “A minimum of three inspections will be performed, as applicable, to insure substantial building code compliance of the above mentioned structure.”
    2 more reviewed findings on this topic
    • Required — Inspection of improvements constructed under a county-approved subdivision plat.
      “To insure conformance with the final subdivision plat and drawings as approved by the Commissioners' Court, a representative of the County Engineer will inspect the subdivision during construction and after construction is completed.”
    • Required — New residential construction and county-permitted structures in applicable flood zones in unincorporated Galveston County.
      “INSPECTIONS FOR X ZONES & SHADED X ZONES 1. FOUNDATION – Before you pour (not required for mobile homes) 2. FRAMING – Before you insulate or sheetrock (not required for mobile homes) 3. FINAL – Once you have completed all mechanical, electrical and plumbing.”
  • Zoning districts · by state lawNo county rule

    Unincorporated Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 land · by state lawNo county rule

    Unincorporated Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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.”
  • Tiny homes · by state lawNo county rule

    Unincorporated Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 homes · by state lawNo county rule

    Unincorporated Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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.”
  • Accessory dwellings · by state lawNo county rule

    Unincorporated Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 septicMixed (with conditions)

    On-site sewage facilities in Galveston County.

    • The Galveston County Health District acts as an authorized agent for TCEQ.
    • The source states that GCHD oversees permitting, installation, and operation of septic systems in Galveston County.
    “The Galveston County Health District (GCHD), an Authorized Agent for the Texas Commission on Environmental Quality (TCEQ), oversees the permitting, installation, and operation of septic systems in the County of Galveston.”
    One more reviewed finding on this topic
    • Local (with conditions) — On-site sewage facility permitting, inspections, and maintenance agreements administered by the Galveston County Health District.
      “Consumer Health - On-Site Sewage Facilities (OSSFs) - Permitting, Inspections, and Maintenance Agreements”
  • Septic inspectionRequired

    On-site sewage facilities subject to Galveston County Health District review.

    • The fee schedule includes residential and commercial re-inspection fees for failed construction inspections.
    • Residential re-inspection is $150 and commercial re-inspection is $250.
    • Each re-inspection fee is one-half of the original permit fee.

    residential re-inspection fee: 150 USD (due to failed construction inspection; one-half of original permit fee) · commercial re-inspection fee: 250 USD (due to failed construction inspection; one-half of original permit fee)

    “Septic Re-inspection - Residential $150.00 Re-inspection fee for OSSF due to failed construction inspection. Charge is ½ of original permit fee.”
  • Subdividing landRegulated (with conditions)

    New subdivisions, family divisions, and replats administered through the Galveston County Engineer and County Clerk processes.

    • New subdivision fees depend on the number of lots.
    • All replats are subject to a $500 fee.
    • A family division requires a replat.
    • Galveston County no longer subdivides tracts or parcels by metes and bounds.
    • County Clerk filing requirements include original tax certificates, a Mylar plat, size and ink specifications, signatures, graphic scale, and certificate information.

    new subdivision fee, 1-10 lots: 250 USD · new subdivision fee, 10-20 lots: 500 USD · new subdivision fee, greater than 20 lots: 500 + 25 per lot over 20 USD · replat fee: 500 USD · plat map filing fee: 70 USD · additional plat page fee: 50 USD · attachment filing fee: 4 USD per page

    “A family division requires a replat. Galveston County no longer subdivides tracts or parcels of land by metes and bounds.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — New subdivisions and replats in unincorporated Galveston County.
      “Fees for New Subdivisions and Replats are as follows: New Subdivision Fees: • 1-10 lots $250 • 10-20 lots $500 • Greater than 20 lots $500 + $25 per lot over 20 Replat Fee: • All replats are $500 A family division requires a replat.”
  • Building in a floodplainRequired

    Development subject to Galveston County floodplain-management regulations in unincorporated areas.

    • The County order states that builders were already required to submit a Development Permit Application under the separate County Flood Plain Management Regulations.
    • The requirement applies to construction subject to the residential building-code statute and its notice process.
    • Municipal requirements may apply inside incorporated areas or municipal extraterritorial jurisdictions.
    “builders are presently required to submit a Development Permit Application to the County Engineer under the separate Regulations of Galveston County for Flood Plain Management”
  • Permit feesPublished

    Published county subdivision, replat, and plat-map filing fees.

    • New subdivision fees vary by lot count.
    • All replats are $500.
    • Plat-map filing and attachment fees are separate County Clerk charges.

    new subdivision fee, 1-10 lots: 250 USD · new subdivision fee, 10-20 lots: 500 USD · new subdivision fee, greater than 20 lots: 500 + 25 per lot over 20 USD · replat fee: 500 USD · plat map filing fee: 70 USD · additional plat pages: 50 USD per page

    “Fees for New Subdivisions and Replats are as follows: New Subdivision Fees: • 1-10 lots $250 • 10-20 lots $500 • Greater than 20 lots $500 + $25 per lot over 20 Replat Fee: • All replats are $500”
  • Permit processPublished

    County subdivision and replat filing process.

    • Plat maps require current original tax certificates, original Mylar, specified dimensions, black non-water-soluble ink, signatures, graphic scale, and County Clerk certificate information.
    • Municipal approved plats must include the incorporated-boundaries wording quoted in the County Clerk document.
    • Additional pages and attachments have separate filing fees.
    “Current original tax certificates from all the property’s taxing entities. Attachments are subject to a $4.00 per page filing fee • Maximum size is 24” x 36’’ • Provide the original plat map on Mylar.”
  • County-wide zoningAbsent

    As a Texas county, Galveston County has no general zoning authority in unincorporated areas; it regulates development via floodplain/development permits rather than zoning districts.

    Galveston County - Engineering/Floodplain Permitting ↗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.”
    2 more reviewed findings on this topic
    • Conditional — The statutory notice-penalty exception for a person building new residential construction covered by Texas Local Government Code Chapter 233.
      “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 — 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 — Construction, installation, alteration, extension, repair, or operation of an OSSF in Texas, including county locations subject to a local permitting authority.
      “A permit is required to construct, install, alter, extend, or repair an OSSF. Always check with your local permitting authority. Local permitting programs can be more stringent than State minimums.”
    • 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”:”
  • 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.”
  • Well permitLimited

    Drilling, equipping, operating, or completing a water well, or substantially altering a well or well pump, where the well is within a groundwater conservation district in Texas.

    • A groundwater conservation district must require a permit except as provided by Texas Water Code §36.117.
    • A district may not require a permit or permit amendment for maintenance or repair that does not increase production capability above the authorized or permitted production rate.
    • Permit applications must be in writing and sworn.
    • Whether a particular private well is exempt or subject to additional district requirements depends on the applicable groundwater conservation district's rules.

    permit application form: in writing and sworn

    “Except as provided by Section 36.117, a district shall require a permit for the drilling, equipping, operating, or completing of wells or for substantially altering the size of wells or well pumps.”
  • Driveway accessRequired

    New or modified access driveways connecting property to a Texas state highway right of way.

    • A local public agency may receive access driveway permitting authority for state highways, but TxDOT approval remains required for drainage impacts on the state highway system before local approval.
    • No access driveway is permitted within a flared or widened right-of-way section at an intersection of a state highway with another highway, road, or street.
    • All entrances and exits, including radii, must be confined within the permittee's property frontage.
    • One-way 45-to-90-degree driveways are permitted for connections to one-way frontage roads or lane-divided highways; otherwise the driveway angle must be 75 to 90 degrees.
    • ADAAG and Texas Accessibility Standards apply.

    private residential driveway maximum width: <= 24 feet (Except as increased by permissible radii.) · driveway-to-pavement radius: >= 15 feet

    “A driveway must be constructed in accordance with a fully executed driveway permit”
  • 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.

  • Certificate of occupancy — Certificate-of-occupancy requirements in unincorporated Galveston County.
  • Local zoning — Zoning adopted or administered by incorporated cities and towns within Galveston County.
  • Mandatory utility hookup — Water, sewer, and electrical utility connections in unincorporated Galveston County.
  • Agricultural exemption — Agricultural exemptions from subdivision, floodplain, driveway, or other county development requirements.
  • Short-term rentals — Short-term rental use in Galveston 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.

Water rights & wells in Galveston County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Texas’s water agency.

Over-appropriated / declining

The aquifer here is over-appropriated and declining. A domestic well is usually still permit-exempt, but long-term supply is a genuine risk.

Household wellExempt up to a limit

Texas groundwater is governed by the rule of capture; a Groundwater Conservation District must exempt qualifying domestic/livestock wells and may not restrict their production, but well registration and spacing rules can still apply and the exemption does not cover wells serving a platted subdivision.

Limit: Domestic/livestock well exempt from GCD production permitting if on a tract >10 acres AND incapable of producing >25,000 gal/day (Tex. Water Code §36.117)

Texas Water Code §36.117 / TWDB ↗
  • Harris-Galveston Subsidence Districtpartial of county

    Created 1975 to end land subsidence by cutting groundwater use; a science-based Regulatory Plan caps groundwater at 10-20% of demand by 2035 and requires district permits and Groundwater Reduction Plans for large users. Small domestic wells largely exempt.

    Texas Water Development Board — Groundwater Districts ↗

Hybrid state (appropriation + riparian). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Texas state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Galveston County, Texas

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

Galveston County scores 49/100 on the Bolthole Index, a solid county profile. Its strengths: low administrative friction for a quiet rural property and a stronger property-autonomy legal backdrop. Watch-outs: about 38,222 people within a 30-minute drive and workable self-sufficiency basics (53.7″/yr rainfall).

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

Galveston 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 Galveston County Health District (Environmental Health, TCEQ Authorized Agent for OSSF). 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 Galveston County?

Living in an RV on your own land in Galveston County is allowed: Unincorporated Galveston County: no county rule sets this, because Galveston 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 galvestoncountytx.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 Galveston County, Texas?

Land in Galveston County runs about $15,245 per acre, based on the latest county data.

What is the water situation in Galveston County?

Galveston County gets about 53.7" of rain a year, with severe drought in roughly 12.4% of years. On water rights, Galveston County lies in the Harris-Galveston Subsidence District — Created 1975 to end land subsidence by cutting groundwater use; a science-based Regulatory Plan caps groundwater at 10-20% of demand by 2035 and requires district permits and Groundwater Reduction Plans for large users. Small domestic wells largely exempt..

How remote is Galveston County?

A representative private-land location has about 38,222 people within a 30-minute drive and 7,861,394 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 Galveston compares in Texas

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