Bolthole Index

Wilson County, Texas

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

51Index Score / 100
#132 of 254 in Texas

Wilson County, Texas has no zoning in its unincorporated areas, but you still need a county development permit before you build, reconstruct, or place a structure on your land12. Wilson County Permitting & Development issues that permit along with septic and driveway approvals, and its forms page states plainly that development, driveway, and septic permits are all required3. Septic goes through Wilson County Health & Public Safety, which acts as the state's authorized agent for on-site sewage facility permits4. If your land sits inside a city limit or a city's extraterritorial jurisdiction, that city's own zoning and permit rules can apply instead5.

At a glance

Building/development permit
Required for construction, reconstruction, or placement of a structure anywhere in unincorporated Wilson County23
Zoning
No zoning in unincorporated Wilson County; Texas law gives counties zoning power only in a handful of special areas16
Septic
Wilson County Health & Public Safety issues OSSF permits as the state's TCEQ-authorized agent47
RV / tiny home / manufactured home
Unrestricted by county zoning, since Wilson County has none — but placing any structure still triggers the county's development permit83
Agricultural exemption
A tract used primarily for agriculture, farming, ranching, wildlife management or timber can skip subdivision/platting rules by filing Attachment 24 with the County Clerk9
Driveway access
A county driveway permit is required for subdivision lots reaching a public road; a TxDOT permit (Form 1058) is required instead for access onto a state highway101112
Floodplain building
A Floodplain Development Permit is required before building in a mapped Special Flood Hazard Area, and must be completed within one year13

Who to call

Building permits

Wilson County Permitting & Development

Issues Wilson County development permits (construction/reconstruction of buildings, placement of structures), driveway permits, and floodplain development permits for unincorporated Wilson County

830-393-8357

Courthouse Annex II, 800 Tenth Street, Bldg B, Floresville, TX 78114

Online permits →

Septic permits

Wilson County Health & Public Safety

Reviews and issues on-site sewage facility (OSSF/septic) permits for Wilson County as a TCEQ-authorized agent

830-393-8357

800 10th Street, Building B, Floresville, TX 78114

Also useful

Wilson County Fire Marshal

Issues county fire-code building permits and inspections for commercial buildings, public buildings, and multifamily residential buildings of four or more units in unincorporated Wilson County, plus agricultural burn permits

830-259-5612

Wilson County Emergency Operations Center, 802 10th St., Floresville, TX 78114

Contact details are copied from each office’s official page and were checked against it on September 24, 2026.

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

Wilson County requires a development permit before you construct or reconstruct a building, or place a structure, anywhere in the unincorporated county — the county's forms page puts it bluntly: permits are required for any development, driveway, or septic work3. This isn't a traditional residential building-code inspection process; Wilson County's subdivision and development rules define "development" broadly enough to cover a new house, a barn, or a placed structure like a manufactured home3. No official Wilson County source confirms an owner-builder exemption from that permit requirement14. If you're subdividing land, a tract used primarily for agriculture, farming, ranching, wildlife management, or timber production can be exempt from the county's subdivision and platting rules by filing Attachment 24 with the Wilson County Clerk9.

Who handles building and development permits in Wilson County, and how do you reach them?

Wilson County Permitting & Development issues development, septic, and driveway permits for unincorporated Wilson County15. Reach the office at Courthouse Annex II, 800 Tenth Street, Bldg B, Floresville, TX 78114, phone 830-393-835715. The same office and number also handle septic and food-service inspections and driveway inspections15. For a commercial building, a public building, or a multifamily residential building of four or more units, expect a separate track through the Wilson County Fire Marshal, which requires a permit and a minimum of three construction site visits or inspections under the adopted 2021 International Fire Code — reach the Fire Marshal at 802 10th St., Floresville, TX 78114, phone 830-259-56121617.

Does Wilson County have zoning?

Wilson County has no zoning regulations in the unincorporated areas of the county — the county's own building-and-zoning letter says so directly16. Texas law backs that up: state law gives counties zoning power only in a handful of specially defined situations, and Wilson County isn't one of them, so the county has no authority to set minimum lot sizes, setbacks, lot coverage, or building-height limits, and no power to restrict where you place an RV, a tiny home, a manufactured home, an accessory dwelling, or a temporary camp8. If you're building within an incorporated city limit or a city's extraterritorial jurisdiction (ETJ), though, that city's own zoning and development rules can still apply — the county specifically tells applicants to contact the relevant city5. None of this removes Wilson County's development, septic, driveway, and floodplain permit requirements, which apply whether or not zoning does6.

How do septic permits work in Wilson County?

Wilson County Health & Public Safety issues on-site sewage facility (OSSF) permits as Wilson County's TCEQ-authorized agent74. Reach that office at 800 10th Street, Building B, Floresville, TX 78114, phone 830-393-8357 — the same location and number as Permitting & Development18. Only 4.2% of Wilson County's soils are rated without severe limitations for a conventional septic drain field, one of the lowest shares in this dataset, so budget for an aerobic or engineered system on most sites19. Fees run $250 for a conventional tank, $350 for one inside a subdivision, and $400 for an aerobic system, and every aerobic system needs a signed affidavit and maintenance contract18. Texas law lets you skip the OSSF permit only if you meet every condition of the state's 10-acre exemption: a single-family home on at least 10 acres, a licensed site evaluation, no nuisance or groundwater pollution, all OSSF components at least 100 feet from the property line, effluent kept on your own property, and no other dwelling on the tract20. Once a system is authorized, you have twelve months to get a final inspection or you'll need a new application and fee21.

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

Because Wilson County has no zoning, there's no county rule restricting RV or tiny-home occupancy on your own land8. That's not the same as no paperwork: putting an RV, tiny home, or other structure on a Wilson County lot can still trigger the county's development-permit requirement, since the subdivision and development rules define development to include placement of a structure on land3. Whatever you place will also need its own septic and driveway permits before you move in, the same as any other dwelling107. No official Wilson County source addresses short-term rental of a residential property either — that's unconfirmed and worth a direct call to Permitting & Development before you plan one15.

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

  1. Call Wilson County Permitting & Development at 830-393-8357 before you design anything — a development permit is required for construction, reconstruction, or placement of any structure in the unincorporated county153.
  2. If your tract is used primarily for agriculture, farming, ranching, wildlife management, or timber, consider filing Attachment 24 with the Wilson County Clerk to exempt it from subdivision and platting requirements9.
  3. Apply for your on-site sewage facility (OSSF) permit through Wilson County Health & Public Safety — fees run $250 to $400 depending on system type, and you'll need a verified physical address and site plan before you apply18.
  4. Check your soils before you design a drain field: only 4.2% of Wilson County's soils are rated without severe limits for a conventional system, so plan on an aerobic or engineered design in most spots19.
  5. Get a driveway permit before you cut a new access — a county Temporary/Permanent Driveway Permit is required for a publicly dedicated road inside a subdivision, and a TxDOT Form 1058 permit is required instead if you're accessing a state highway101112.
  6. If any part of your site is in a mapped Special Flood Hazard Area, get a Floodplain Development Permit before you build — permit actions must be completed within one year unless you get an extension13.
  7. Drilling a well capable of more than 25,000 gallons a day or 17.5 gallons a minute needs a production permit from the Evergreen Underground Water Conservation District; smaller wells are exempt from a permit but still must be registered22.
  8. Building a commercial building, public building, or multifamily building of four or more units? Route it through the Wilson County Fire Marshal, which requires a permit and at least three inspections under the adopted fire code1716.

What to check before you buy land in Wilson County

Wilson County's septic math is tough: only 4.2% of the county's soils are rated without severe limitations for a conventional drain field, one of the lowest shares in this dataset, so budget for an aerobic or engineered system and get a site evaluation before you commit to a parcel19. The land itself is flat and largely open — 100% of it sits at 15% slope or less and just 12.8% is wooded — so grading typically isn't the obstacle here; drainage and soils are2324. Wilson County is also genuinely drought-prone: severe drought has hit about 20.8% of years on record, with only 31.4 inches of rain a year on average, so ask about the well and its yield before you commit2526. It's not remote — the county sits about 34 miles from the nearest metro area, with a population density of 67.4 people per square mile2728. A typical home here runs about $407,837, with a median property tax bill near $3,726 a year at an effective rate of 1.3%, and typical homeowners insurance costs about $1,925 a year29303132. Before you close, confirm whether your parcel is inside a city's ETJ (where city rules, not the county's no-zoning default, would apply), check the FEMA flood map, and ask Permitting & Development whether a development, septic, or driveway permit is still outstanding on the property51315.

Watch-outs

  • Wilson County has no zoning, but that doesn't mean no paperwork — the same official materials that describe the no-zoning default also require a development permit for constructing, reconstructing, or placing any structure63.
  • If your land sits inside a city's extraterritorial jurisdiction (ETJ), that city's zoning and development rules apply instead of the county's no-zoning default — check with the specific city before assuming Wilson County's rules cover you5.
  • Wilson County's development, septic, and driveway permits are handled as one bundled process, not three separate ones — the county's own permit-requirement page must be included with all three applications33.

Sources

  1. Building and Zoning Letter (2026 county census)
  2. Wilson County Forms and Permits (2026 county census)
  3. Wilson County Forms and Permits, quoted and re-checked
  4. Septic Permit Application Checklist (2026 county census)
  5. Building and Zoning Letter, quoted and re-checked
  6. Building and Zoning Letter, quoted and re-checked
  7. Septic Permit Application Checklist, quoted and re-checked
  8. Texas law on county zoning and building authority
  9. Wilson County Subdivision Regulations Adopted 4-13-26, quoted and re-checked
  10. Order Adopting Rules of Wilson County, Texas, quoted and re-checked
  11. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  12. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  13. 60.3(d) Revised as of October 1, 1989, quoted and re-checked
  14. (2026 county census)
  15. Wilson County Permitting & Development (co.wilson.tx.us)
  16. Wilson County Fire Marshal Office Fee Schedule, quoted and re-checked
  17. Wilson County Fire Marshal (co.wilson.tx.us)
  18. Wilson County Health & Public Safety (co.wilson.tx.us)
  19. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  20. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
  21. Permitting & Development, quoted and re-checked
  22. Evergreen Underground Water Conservation District, quoted and re-checked
  23. Share of land at 15% slope or less: Bolthole Index county data
  24. Wooded share of land: Bolthole Index county data
  25. Share of years in severe drought: Bolthole Index county data
  26. Annual precipitation: Bolthole Index county data
  27. Distance to the nearest metro area: Bolthole Index county data
  28. Population density: Bolthole Index county data
  29. Typical home value (Zillow): Bolthole Index county data
  30. Median property tax bill: Bolthole Index county data
  31. Effective property tax rate: Bolthole Index county data
  32. Typical home insurance premium: Bolthole Index county data
  33. Wilson County Forms/Permits/911 Addressing, quoted and re-checked

Written September 24, 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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County locator

Wilson County in Texas

51
County map
Wilson County highlighted among the Texas counties · colored by Index score

How Wilson County scores

Seclusion28100% ev.
Self-Sufficiency3996% ev.
Admin Boringness7490% ev.
Durability44100% ev.
Property Autonomy71100% ev.
Carry Cost69100% 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 →

$408kTypical home
1.3%Property tax
$4,471Land / acre
31.4"Annual rain
20.8% of yrsSevere drought
48.5 / yr (+32.2)Mid-century 100°F days
27.6 daysMid-century dry spell
2.18" (+4.3%)Mid-century 1-day rain
1.4×Wildfire change factor
100%Forward climate coverage
$1,925Home insurance / yr
0.9% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
24,783People within 30 min
5,162,188People within 2 hr
36,863Radius comparison (15 mi)
67.4People / sq mi
0%Federal land
100%Land at 15% slope or less
4.2%Septic soil without severe limits
20,826 acWorkable land screen
12.8%Wooded land
15.1 tonsBiomass / forest ac
70°FAvg temp

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Answers from the rulebook for Wilson County

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

Wilson County rules

  • Building permitLimited

    County development permitting for construction or reconstruction of a building, or placement of a structure, in Wilson County; the cited county development rules specifically regulate subdivisions outside incorporated cities.

    • The county forms page states that the listed development permits are required.
    • The 2026 subdivision regulations define development to include construction or reconstruction of a building and placement of a structure on land.
    • The subdivision regulations apply to subdivisions situated outside incorporated cities; incorporated municipalities may impose separate requirements.
    • This claim does not establish a general residential structural building-code permit for every project; it establishes the county development-permit requirement evidenced by the official county materials.
    “Wilson County REQUIRES PERMITS FOR ANY DEVELOPMENT/DRIVEWAYS/SEPTIC”
  • InspectionsRequired

    Commercial building permits and projects regulated by the Wilson County adopted fire code.

    • The fee schedule is issued by the Wilson County Fire Marshal Office.
    • The cited inspection requirement is for projects regulated by the adopted 2021 International Fire Code and is not a general statement that every residential building receives county structural inspections.
    • Fees are paid prior to vertical construction.
    • The schedule was adopted December 22, 2025 and revised November 30, 2025.

    minimum construction site visits and/or inspections: >= 3 visits (for approved processed building plans regulated under the cited fire-code process)

    “The process includes issuing the building permit and a minimum of three construction site visits and/or inspections to ensure compliance to the adopted 2021 IFC.”
  • County-wide zoningAbsent (with conditions)

    County zoning regulations in the unincorporated areas of Wilson County.

    • Wilson County requires floodplain, septic, and driveway permits for construction in unincorporated areas.
    • Construction within city limits or a municipality's ETJ may be subject to the applicable city's zoning or development regulations.
    • Property accessed from a State-maintained highway may also be subject to TxDOT driveway regulations.
    • This claim does not address subdivision platting requirements or other non-zoning regulations.
    “There are no zoning regulations for the unincorporated areas of Wilson County.”
  • Local zoningVaries (with conditions)

    Local zoning and development regulation across Wilson County, including unincorporated areas, incorporated city limits, and municipal ETJs; this is an aggregate countywide conclusion and does not attribute municipal ordinances to the county.

    • The county's official letter states that no zoning regulations apply in unincorporated Wilson County.
    • Within city limits or an ETJ, the applicable city may impose its own zoning or development regulations.
    • County floodplain, septic, driveway, and other development requirements may still apply where authorized.
    • TxDOT driveway regulations may apply to property accessed from a State-maintained highway.
    “There are no zoning regulations for the unincorporated areas of Wilson County. If you are doing constructions within city limits or an ETJ, I recommend that you contact the applicable city for their zoning/development regulations within their city limits and/or ETJ.”
  • Zoning districts · by state lawNo county rule

    Unincorporated Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning.

    • 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

    On-site sewage facilities in Wilson County, Texas.

    • Wilson County Health & Public Safety administers the application and site-investigation process shown in the county OSSF form.
    • TCEQ's general authorized-agent framework includes permit review and inspections.
    “Authorization is hereby given to Wilson County Health & Public Safety to enter upon the above described property for the purpose of soil/site evaluation and investigation of an on-site sewage facility.”
  • Septic inspectionRequired

    Permitted OSSF construction in Wilson County, including final inspection before completion of the authorization period.

    • Wilson County identifies septic inspections as a county service.
    • If a final inspection has not been performed within one year of authorization, a new application and fee are required.
    • TCEQ describes authorized-agent inspection responsibility for OSSFs.

    final inspection deadline: 1 year from authorization issue (Failure to complete the final inspection requires a new application and fee.)

    “The authorization to construct is valid for twelve months from the date of issue. If a final inspection has not been performed within one year of issue, a new application and fee will be required.”
  • Well permitLimited

    Water wells in Wilson County that are within the Evergreen Underground Water Conservation District.

    • Evergreen Underground Water Conservation District covers Wilson County.
    • A production permit is required before drilling or operating a well capable of producing more than 25,000 gallons per day, more than 17.5 gallons per minute, or used for public supply.
    • Exempt wells below both thresholds do not require a permit but must be registered.
    • Permitted wells must comply with production limits, spacing requirements, and annual water-use reporting.

    production capacity threshold: > 25000 gallons per day (A well below the threshold may be exempt but still requires registration.) · production rate threshold: > 17.5 gallons per minute (A well below the threshold may be exempt but still requires registration.)

    “If your well is capable of producing more than 25,000 gallons per day, more than 17.5 gallons per minute (GPM), or is used for public supply, you must obtain a production permit before drilling or operating the well.”
  • Agricultural exemptionAvailable (with conditions)

    A division of land into agricultural operation tracts in Wilson County that would otherwise be subject to the county's subdivision regulations and platting requirements.

    • Attachment 24 must be filed with the Wilson County Clerk.
    • The owner must not lay out any part of the tract as streets, alleys, squares, parks, or other parts intended to be dedicated to public use.
    • The land must 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.
    • If the tract ceases to be used primarily for the qualifying agricultural, farm, ranch, wildlife management, or timber production use, the subdivision-regulation requirements apply.
    • The Wilson County Clerk filing is the required process for claiming the exemption.
    “A division of a tract of land into agricultural operation tracts is exempt if Attachment 24 is filed with the County Clerk and:”
  • Driveway accessRequired

    Driveways serving lots within subdivisions regulated by the Wilson County Subdivision and Development Rules and Regulations, where access is proposed onto a publicly dedicated roadway.

    • A Temporary/Permanent Driveway Permit must be issued by Wilson County before access onto a publicly dedicated roadway is permitted.
    • The driveway must be constructed according to specifications stated within the permit.
    • The subdivision rules also state that homes may not be built or brought onto a lot until driveway and floodplain development permits have been obtained and an application for a septic permit is submitted.
    • Municipal rules may apply in incorporated territory.
    “no driveway constructed on any lot within this subdivision shall be permitted access onto a publicly dedicated roadway unless a Temporary/Permanent Driveway Permit has been issued by Wilson County. The driveway shall be constructed according to specifications stated within the permit.”
  • Building in a floodplainRequired

    Development in Wilson County special flood hazard areas and county-regulated subdivisions, manufactured home parks, and large-scale development projects.

    • The order applies to areas of special flood hazard within Wilson County jurisdiction and to subdivisions, manufactured home parks, and large-scale development projects, except municipal territory, including extraterritorial jurisdiction, regulated by a municipal flood plain ordinance.
    • A Floodplain Development Permit is required for conformance with the order.
    • A Development Permit Exemption Certificate may be obtained when proposed development is not in the Special Flood Hazard Area.
    • No structure or land in the Special Flood Hazard Area may be located, altered, or have its use changed without compliance with the order, including obtaining a Flood Plain Development Permit.
    • No subdivision, manufactured home park, or large-scale development project may be begun, altered, or completed without compliance, including obtaining a Flood Plain Development Permit.
    • Permit actions must be completed within one year unless an extension is requested and obtained.
    • The permit or exemption certificate fee is set by Commissioners Court.
    • The county order adopts the FEMA Flood Insurance Study and maps dated November 26, 2010, and revisions thereto.

    permit completion period: 1 year (unless an extension is requested and obtained) · base flood elevation increase limit where no regulatory floodway is designated in Zones A1-30 and AE: <= 1 foot (unless the cumulative effect is demonstrated not to increase the base flood water surface elevation more than one foot)

    “A Floodplain Development Permit shall be required to ensure conformance with the provisions of this order.”
  • Permit feesPublished

    Fees for applications for permits issued by Wilson County, including development, driveway, and septic permits.

    • The county forms page directs applicants to a complete list of development and permit fees.
    • The official fee schedule is titled “Fees for Applications for Permits Issued by Wilson County.”
    “For a complete list of development & permit fees click here.”
  • Permit processPartial

    County development, driveway, and septic permitting processes in Wilson County.

    • Wilson County requires permits for development, driveways, and septic work.
    • The permit requirement page must be included with development, septic, and driveway permits.
    • Applicants are directed to contact the county office at 830-393-8357 with questions.
    • The county forms page provides permit packets, applications, septic forms, development permits, PIPROW/driveway materials, and driveway specifications, but does not state a complete end-to-end processing timeline.
    “The permits on this page are required. For any questions, call our office 830-393-8357. * Permit Requirement Page must be included with Development, Septic, & Driveway permits”

Texas rules that apply here

  • 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:”
  • Septic permitRequired

    Construction, installation, alteration, extension, or repair of an OSSF in Texas

    • A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.
    • A 10-acre exemption may apply only if all listed conditions are met: site evaluation by a TCEQ-licensed site evaluator or professional engineer; single-family dwelling on at least 10 acres; no nuisance or groundwater pollution; all OSSF parts at least 100 feet from the property line; effluent disposed of on the property; and the single-family dwelling is the only dwelling on the tract.
    • Emergency repairs listed by TCEQ do not require a permit but must be reported in writing to the permitting authority within 72 hours after repairs begin.
    • Grandfathered systems may also be exempt if the stated conditions are met.

    minimum tract size for 10-acre exemption: >= 10 acres (single-family dwelling and all other TCEQ conditions must be met) · minimum OSSF distance from property line for 10-acre exemption: >= 100 feet (all parts of the OSSF) · emergency repair reporting deadline: <= 72 hours (after repairs have begun; written report to permitting authority)

    “A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
  • county zoning authorityLimited

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

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

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

    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • 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.”

Still unanswered

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

  • Owner-builder exemption — Owner-builder exemptions from Wilson County building or development permitting requirements.
  • Certificate of occupancy — Countywide certificate-of-occupancy requirements for Wilson County buildings.
  • Short-term rentals — Short-term rental use of residential property in Wilson County.

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

Living off-grid in Wilson County, Texas

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

Wilson County scores 51/100 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: sparse surroundings — about 24,783 people within a 30-minute drive and workable self-sufficiency basics (31.4″/yr rainfall).

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

Wilson 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 Wilson County Health & Public Safety Office (TCEQ authorized agent for OSSF). 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 Wilson County?

Living in an RV on your own land in Wilson County is allowed: Unincorporated Wilson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Wilson County has no zoning ordinance. Wilson County's own reviewed answer confirms it has no county-wide zoning. 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 Wilson County, Texas?

Land in Wilson County runs about $4,471 per acre, based on the latest county data.

What is the water situation in Wilson County?

Wilson County gets about 31.4" of rain a year, with severe drought in roughly 20.8% of years.

How remote is Wilson County?

A representative private-land location has about 24,783 people within a 30-minute drive and 5,162,188 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.

Off-grid gear

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

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How Wilson compares in Texas

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