Bolthole Index

Gillespie County, Texas

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

65Index Score / 100
#69 of 254 in Texas

Unincorporated Gillespie County, Texas has no general building permit and no zoning ordinance, but you still have to check in before you build12. The Engineering Department requires a Development Permit Determination Form (DDF) before any new construction, grading or paving; the department then tells you whether you need anything further34. Septic systems go through the county's own OSSF Department, and Texas law adds a 10-acre exemption for some rural tracts56.

At a glance

Building permit
No general permit, but a Development Permit Determination Form must be filed before new construction, grading or paving13
Zoning
None; Texas law gives Gillespie County no zoning authority27
Septic
Permitted by the county's own OSSF Department, after floodplain sign-off from the Engineering Department58
RV / tiny home living
Unrestricted by county zoning, because the county has no zoning ordinance2
Owner-builder exemption
Not documented on the county's site; ask the Engineering Department directly9
Minimum lot size (subdivisions)
6 acres per lot with an individual well, 2 acres with community water and OSSF, 1 acre with community water and sewer10
Wells
Every well must register with the Hill Country Underground Water Conservation District; commercial, irrigation and public-supply wells need a district permit11

Who to call

Building permits

Gillespie County Engineering Department

Development Permit Determination Forms, floodplain development permits, right-of-way permits, and subdivision/manufactured home rental community review for unincorporated Gillespie County

830-307-6196

[email protected]

101 West Main St., Room B-105, Fredericksburg, TX 78624

Septic permits

Gillespie County Sanitation (On-Site Sewage Facilities) Department

OSSF (septic) permits for Gillespie County

830-997-8191

[email protected]

101 West Main St., Room B-101, Fredericksburg, TX 78624

Well permits

Hill Country Underground Water Conservation District

Well registration and permitting in Gillespie County

830-997-4472

[email protected]

508 South Washington St., Fredericksburg, TX 78624

Online permits →

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 Gillespie County, Texas?

Unincorporated Gillespie County has no general countywide building permit for a house1. What it does have is a Development Permit Determination Form (DDF), which the Engineering Department requires before you start any new construction, grading or paving on a property3. You submit the DDF first, and the Engineering Department reviews it and either tells you no additional permit is needed or hands you a Development Permit Application with a checklist for your project412. Whether you owe anything further depends mostly on how close your site sits to the 100-year floodplain and the scope of the work, so treat the DDF as the first call you make, not a formality to skip13.

Who is the Gillespie County building department, and how do you reach them?

Gillespie County does not have a separate building inspections department; the Engineering Department handles development permitting, floodplain review, right-of-way permits, and subdivision and manufactured home rental community applications for unincorporated Gillespie County123. Reach the Engineering Department at 830-307-6196 or [email protected], at 101 West Main St., Room B-105, Fredericksburg, TX 7862412. Right-of-way permit applications get a completeness notice within 10 business days and a full review within another 10 business days once the application is complete, and you cannot start construction in the right-of-way before that permit is approved4.

Does Gillespie County have zoning?

Gillespie County has no zoning ordinance, and under Texas law it has no authority to adopt one: Local Government Code Chapter 231 grants county zoning power only in a handful of named, geographically limited situations, such as parts of Cameron and Willacy counties near Padre Island, and Gillespie County is not one of them27. That means the county sets no minimum dwelling size, no lot-coverage limit, no building-height limit and no zoning districts anywhere in the unincorporated county2. Inside a platted subdivision, though, the county's subdivision rules still apply: lots require a 20-foot building setback on the front, sides and rear, and lot size is set by the water and wastewater service the subdivision uses, from 6 acres per lot with an individual well down to 1 acre with community water and sewer1410.

How do septic permits work in Gillespie County?

Septic systems (OSSFs) in Gillespie County are permitted by the county's own Sanitation (On-Site Sewage Facilities) Department, not by the state58. Your OSSF application is not considered complete until the Engineering Department has signed off on your Development Permit Determination Form and floodplain review and sent a copy to the OSSF Office, so that form comes before, not after, your septic paperwork815. Statewide, Texas requires a permit and an approved plan for every OSSF, with a narrow exception for a single-family home on at least 10 acres that meets a list of conditions, including keeping every part of the system at least 100 feet from the property line6. Soils matter here: only about 4.2% of Gillespie County's land lacks severe limitations for a conventional septic drain field, so most rural buyers should plan and budget for an engineered or alternative OSSF rather than assume a standard drain field will pass16.

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

Because Gillespie County has no zoning ordinance and no legal authority to adopt one, county zoning places no restriction on RV occupancy, tiny-home occupancy, manufactured-home occupancy or temporary camping on unincorporated land2. That is a real answer, not a gap in the research: it follows from Texas only granting county zoning power in specific situations that do not include Gillespie County7. It is not a blanket green light, though. Any dwelling still needs a working water source and a legal way to handle wastewater, and if you plan a well, the well itself must be registered with the Hill Country Underground Water Conservation District before you drill1117. If your property sits inside a platted subdivision, that subdivision's own building and setback lines still apply regardless of the county's lack of zoning14.

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

  1. File a Development Permit Determination Form with the Engineering Department before you break ground on new construction, grading or paving, and wait for their response on whether more permitting is needed312.
  2. If your land is inside a platted subdivision, confirm the plat's 20-foot setbacks and the minimum lot size tied to your water and wastewater service before you site the house1410.
  3. If you need a well, register it with the Hill Country Underground Water Conservation District, and apply for a district permit if it will serve commercial, irrigation or public-supply use1117.
  4. Apply for your OSSF (septic) permit with the Sanitation Department once the Engineering Department has signed your DDF815.
  5. If your only access is a driveway onto a state highway, file TxDOT Form 1058 for a driveway permit and give TxDOT 24-hour notice before you start work in the right-of-way18.
  6. If your driveway or any improvement instead touches a county road right-of-way, get a right-of-way permit from the Engineering Department before construction starts4.

What to check before you buy land in Gillespie County

Water: any well needs to be registered with the Hill Country Underground Water Conservation District, and a new permitted well carries a $1,000 application fee plus a $100 refundable deposit, so budget for it before you assume a tract has cheap water11. Soils: with only 4.2% of Gillespie County's land free of severe limitations for a conventional septic drain field, ask the Sanitation Department early whether your specific parcel will need an engineered system1615. Flood: if any part of your site is near the 100-year floodplain, the Engineering Department's floodplain review adds an administrative fee of $100 to your Development Permit Determination Form, and building before approval doubles the calculated fee13. Climate and taxes: Gillespie County sits in severe drought roughly 46% of years, which can strain a private well in a dry stretch, and the median property tax bill runs about $4,404 a year at an effective rate near 1%192021. The county is about 69 miles from the nearest metro area, worth weighing against how often you will need a hospital, hardware store or airport22.

Watch-outs

  • Gillespie County has not published a general owner-builder exemption anywhere on its site; call the Engineering Department directly before you assume one applies9.
  • Only 4.2% of Gillespie County's soils lack severe limitations for a conventional septic drain field, so most rural tracts should budget for an engineered or alternative OSSF rather than a standard field16.

Sources

  1. Engineering Department (2026 county census)
  2. Texas law on county zoning and building authority
  3. Engineering Department, quoted and re-checked
  4. Engineering Department, quoted and re-checked
  5. Sanitation (On-Site Sewage Facilities) Department (2026 county census)
  6. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
  7. Local Government Code Chapter 231, County Zoning Authority (Texas statewide rule), quoted and re-checked
  8. Sanitation (On-Site Sewage Facilities) Department, quoted and re-checked
  9. (2026 county census)
  10. Engineering Department, quoted and re-checked
  11. Permit applications, quoted and re-checked
  12. Gillespie County Engineering Department (gillespiecounty.gov)
  13. Gillespie County Flood Damage Prevention Ordinance, quoted and re-checked
  14. Subdivision and Manufactured Home Rental Community Regulations for Gillespie County, Texas, quoted and re-checked
  15. Gillespie County Sanitation (On-Site Sewage Facilities) Department (gillespiecounty.gov)
  16. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  17. Hill Country Underground Water Conservation District (hcuwcd.org)
  18. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  19. Share of years in severe drought: Bolthole Index county data
  20. Median property tax bill: Bolthole Index county data
  21. Effective property tax rate: Bolthole Index county data
  22. Distance to the nearest metro area: Bolthole Index county data

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

Gillespie County in Texas

65
County map
Gillespie County highlighted among the Texas counties · colored by Index score

How Gillespie County scores

Seclusion70100% ev.
Self-Sufficiency4696% ev.
Admin Boringness7490% ev.
Durability34100% ev.
Property Autonomy71100% ev.
Carry Cost66100% 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 →

$519kTypical home
1%Property tax
$3,993Land / acre
30.1"Annual rain
46% of yrsSevere drought
23.2 / yr (+18.7)Mid-century 100°F days
27.8 daysMid-century dry spell
2.49" (+11.2%)Mid-century 1-day rain
1.39×Wildfire change factor
100%Forward climate coverage
$2,395Home insurance / yr
3.8% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
2,167People within 30 min
4,464,210People within 2 hr
20,035Radius comparison (15 mi)
26.2People / sq mi
0.1%Federal land
93.1%Land at 15% slope or less
4.2%Septic soil without severe limits
28,501 acWorkable land screen
25.9%Wooded land
12.9 tonsBiomass / forest ac
65.8°FAvg temp

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Answers from the rulebook for Gillespie County

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

Gillespie County rules

  • Building permitLimited

    County-administered development permitting for property development, floodplain development, manufactured home rental communities, subdivisions, and improvements in public rights-of-way in unincorporated Gillespie County.

    • A Development Permit Determination Form must be submitted before development of a property, including new construction, grading, and paving.
    • After review, the County may determine that no additional Engineering Department permit is required or may require a Development Permit Application and checklist.
    • Floodplain submittal requirements depend on proximity to the 100-year floodplain and the scope of work.
    • An MHRC application must be submitted and approved by the County Engineer before construction starts.
    • A right-of-way permit is required before constructing or modifying improvements within a public right-of-way, and must be returned to the County Engineer before construction starts.
    • This claim does not establish a general countywide building permit requirement for every residential construction project.
    “The Engineering Department requires a Development Permit Determination Form (DDF) to be submitted prior to the development of a property”
  • Building code adoptedPartial

    Construction at Gillespie County Airport, including hangars, T-hangars, and other airport structures.

    • All airport construction must be authorized by the Gillespie County Commissioners Court.
    • Standards for hangar and T-hangar construction are included in Appendix A of the Minimum Operating Standards.
    • The Southern Standard Building Code applies to other structures erected at the airport.
    • Structures existing at the airport when the instrument was issued are grandfathered from the stated standards.
    • This source establishes an airport-specific construction-code requirement, not adoption of a general countywide building code.
    “All construction at the airport must be authorized by the Commissioners Court. Standards for hangar and T-hangar construction are included as Appendix A of Minimum Operating Standards. Southern Standard Building Code will apply to other structures erected at the airport. Structures existing at the airport at the date of this instrument are grandfathered from the above standards.”
  • Certificate of occupancyLimited

    Lease compliance for development at Gillespie County Airport.

    • The airport development process states that the lessee receives a Certificate of Occupancy before the Airport Manager and a Board representative inspect the final project for compliance with the Lease Agreement.
    • The airport is within the City of Fredericksburg, and developers and contractors must comply with the City's construction rules and regulations.
    • Before moving beyond groundwork, the lessee must have an approved FAA Form 7460-1 airspace study, which should be submitted at least 45 days before erecting the building.

    FAA airspace study lead time: >= 45 days (The source says the form should be submitted at least 45 days prior to erecting the building.)

    “Once the Lessee receives a "Certificate of Occupancy," the Airport Manager and a Board representative will inspect the final project”
  • Local zoningPresent (with conditions)

    Structures and objects of natural growth within the Gillespie County Airport airspace outline and other areas governed by the county airport zoning ordinance.

    • The ordinance regulates and restricts heights around the airport for aircraft and ground safety.
    • If the property falls under the airport airspace outline in the Hazard Zoning Chart, FAA Form 7460-1 may be required at least 45 days before construction.
    • FAA filing conditions listed by the county include a structure exceeding 200 feet above ground level, proximity to the airport with an exceeded slope ratio, traverseway construction exceeding applicable standards, certain frequency emissions, instrument-approach-area impacts, proximity to a navigation facility, construction on an airport or heliport, or an FAA request.
    “The Airport Zoning Ordinance is established to regulate and restrict the heights of structures and objects of natural growth around the airport to enhance safety of aircraft in flight and objects on the ground.”
  • Zoning districts · by state lawNo county rule

    Unincorporated Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 sizeSpecified

    Lots in subdivisions in unincorporated Gillespie County, with the minimum determined by water and wastewater service.

    • For individual water wells, the December 23, 2024 amendment requires a six-acre minimum and limits total lots to subdivision acreage divided by eight.
    • For community or public water with an OSSF, the regulation states a two-acre minimum and total lots divided by three.
    • For community or public water with community or public sewage collection, the regulation states a one-acre minimum and total lots divided by two.
    • The two-acre OSSF option requires that the OSSF can be installed in compliance with the County's current OSSF regulations.
    • The cited regulations apply to the unincorporated area of Gillespie County.

    minimum lot size, individual water well: >= 6 acres · maximum lots, individual water well: parent/subdivision acreage divided by 8 (Future replats may not reduce the whole-subdivision average lot size below subdivision acreage divided by 8.) · minimum lot size, community/public water and OSSF: >= 2 acres (OSSF must comply with current County OSSF regulations.) · maximum lots, community/public water and OSSF: total acreage divided by 3 · minimum lot size, community/public water and public wastewater: >= 1 acres · maximum lots, community/public water and public wastewater: total acreage divided by 2

    “Six (6) acres for lots where individual water wells are planned to be the primary source of potable water;”
  • SetbacksSpecified

    Setbacks in model subdivisions in unincorporated Gillespie County where the area lacks a nationally recognized fire code and water lines sized for fire protection.

    • Road and right-of-way setbacks are at least 10 feet.
    • Adjacent-property-line setbacks are at least 5 feet.
    • The setbacks may not conflict with separation or setback distances required by rules governing public utilities, OSSF, or drinking-water supplies.
    • Setback lines required elsewhere in County orders or rules control when they require greater setbacks.

    road or right-of-way setback: >= 10 feet · adjacent property line setback: >= 5 feet

    “In areas that lack a nationally recognized fire code as described in §§ 233.061-.062 of the Texas Local Government Code, and that also lack water lines sized for fire protection, set-backs from roads and rights-of-way shall be a minimum of 10-feet, set-backs from adjacent property lines shall be a minimum of 5-feet and shall not conflict with separation or set-back distances required by rules governing public utilities, on-site sewerage facilities, or drinking water supplies. Notwithstanding anything to the contrary stated in this paragraph (18), set-back lines required elsewhere in the County’s orders or rules (including these Regulations) shall control to the extent greater set-backs are therein required.”
    One more reviewed finding on this topic
  • Lot coverage · by state lawNo county rule

    Unincorporated Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.gov.

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

    On-site sewage facility permitting in Gillespie County.

    • Floodplain determinations must be completed by the County Engineer's Office before septic applications are submitted to the OSSF Office for properties subject to that process.
    “Please keep in mind that this Form is a requirement for septic permit approval and your OSSF/septic application will not be considered complete until the Development Permit Determination Form has been signed by the County Engineer's Office and a copy provided to the OSSF Office.”
  • Well permitLimited

    Water wells in Gillespie County within the regulatory jurisdiction of the Hill Country Underground Water Conservation District.

    • All wells in Gillespie County must be registered with HCUWCD.
    • Commercial, irrigation, municipal, and public water-supply wells require a district permit before drilling or operation.
    • Landscape irrigation wells attached to an irrigation system serving more than one-half acre require a permit.
    • Domestic or livestock-only wells use registration rather than the commercial/irrigation/public-supply permit, subject to the district's stated exceptions.
    • A domestic well attached to an irrigation system serving more than one-half acre is not exempt and must obtain a permit.
    • A qualifying multifamily well on 10 acres or less may be exempt if one well supplies no more than four households for domestic use only.
    • Wells pumping more than 50,000 gallons into surface tank impoundments are subject to the district's stated limitation and exception.
    • New permitted wells have a $1,000 application fee and a $100 refundable deposit upon receipt of the driller's log; existing permitted wells have a $1,000 application fee.

    new permitted well application fee: 1000 USD (plus $100 refundable deposit once the District receives the driller's log) · existing permitted well application fee: 1000 USD · landscape irrigation threshold: > 0.5 acre (well attached to an irrigation system)

    “District Rules require all wells in Gillespie County used for commercial, irrigation, municipal, public water supply, inclusive of wells used in landscape irrigation on greater than ½ acre and attached to an irrigation system, be permitted with the District prior to drilling or operation.”
  • Subdividing landRegulated (with conditions)

    Platting and subdivision of land in the unincorporated area of Gillespie County.

    • A plat must comply with the County's minimum standards and applicable state and federal requirements.
    • The approved plat must be recorded before lots are sold.
    • The Commissioners Court must approve the plat before it is valid.
    • Certain statutory and local exceptions to platting exist, including a December 23, 2024 exception for certain sales or exchanges with adjoining owners where the smaller resulting tract is at least 6 acres and the average resulting tract size is at least 8 acres; that exception does not apply if it changes the boundary between legally platted lots or decreases land in a legally platted subdivision.
    • Floodplain residential plats require compliance with NFIP minimum requirements and applicable County regulations or orders.
    “The Regulations shall govern plats and subdivisions of land as well as manufactured home rental communities (“MHRC”) within the unincorporated area of Gillespie County, Texas”
  • Permit feesPublished (with conditions)

    Published Gillespie County fees for floodplain development permits, right-of-way permits, subdivision and manufactured home rental community applications, and on-site sewage facilities.

    • Floodplain administrative fee is $100 and third-party review is actual cost.
    • Floodplain fees must be paid at application; if construction started before permit approval, the calculated fee is doubled.
    • Right-of-way fees include $50 for an individual single-family residential improvement, $500 for multiple single-family residential/residential subdivision/MHRC/non-residential improvement, and actual cost for third-party engineering review.
    • Subdivision and MHRC fees vary by lot count; recording fees are paid to the County Clerk and inspection and third-party engineering fees are actual cost.
    • OSSF fees are from a schedule effective October 14, 2025.
    • The Commissioners Court may amend or adjust applicable fee schedules.

    floodplain administrative fee: 100 USD · right-of-way individual single-family residential improvement fee: 50 USD · subdivision/MHRC fee for 1-4 lots: 500 + 100/lot USD · OSSF new/upgrade under 500 gpd: 325 USD · OSSF reinspection fee: 150 USD

    “Table 2-1: Floodplain Development Permit Application Fees If construction has started prior to approval of a floodplain development permit application, the applicant shall pay the calculated permit fee x 2. Review Type Fee Administrative Fee $100 Third Party Review Fee Actual cost”
  • Permit processPublished (with conditions)

    County-administered development, floodplain, right-of-way, subdivision, and MHRC permitting in Gillespie County.

    • A DDF is required before property development, including new construction, grading, and paving; the County then determines whether additional permitting is required.
    • An MHRC application must be submitted and approved by the County Engineer before construction starts.
    • For right-of-way permits, the applicant requests a pre-application meeting, submits a complete application and supporting documents, receives completeness notice within 10 business days, and the County Engineer reviews a complete application within 10 business days.
    • Construction may not begin before right-of-way permit approval.
    • Missing information or a disapproved application generally requires resubmission within 45 days.

    right-of-way completeness notice: 10 business days · right-of-way complete-application review: 10 business days · right-of-way resubmission deadline: 45 days (Missing information or disapproved applications)

    “After the completed DDF is submitted, the Engineering Department reviews the information and will either return the DDF indicating that no additional permitting is required from the Engineering Department or will return a Development Permit Application with a checklist detailing the submittal requirements for the project.”
  • County-wide zoningAbsent

    Texas counties lack zoning authority; Gillespie County regulates land only through subdivision rules (e.g., 6-acre minimum lot for well/OSSF) and floodplain development, not zoning districts.

    Gillespie County (TX) Engineering Department ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • 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”:”
  • Septic inspectionLimited

    OSSF installation and, where applicable, maintenance inspections in Texas

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

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

    “Many times, the AA has a "designated representative" (DR) to assist them with their responsibilities, which include reviewing plans for constructing, altering, extending or repairing each OSSF; issuing permits; and inspecting system installation. [...] If the system uses an electronic monitor, automatic radio or telephone to notify the maintenance provider of system or component failure and to monitor the amount of disinfection in the system, reporting may be reduced to every six months.”
  • 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.”
  • 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 Gillespie County building permits, inspections, or related approvals.
  • Agricultural exemption — Agricultural exemptions from Gillespie County subdivision, setback, lot-coverage, height, or dwelling-size rules in unincorporated Gillespie County.
  • Short-term rentals — General short-term rental legality in Gillespie 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 Gillespie County

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

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

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 ↗
  • Hill Country Priority Groundwater Management Areapartial of county

    TCEQ PGMA identifying existing or anticipated critical groundwater problems; drives GCD coverage and heightened management. Domestic/livestock wells remain exempt from GCD permits but spacing/registration may apply.

    TCEQ — Priority Groundwater Management Areas ↗

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 Gillespie County, Texas

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

Gillespie County scores 65/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and a stronger property-autonomy legal backdrop. Watch-outs: elevated mid-century heat, water, rain, or wildfire exposure.

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

Gillespie 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 Gillespie County Sanitation (On-Site Sewage Facilities) Department. 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 Gillespie County?

Living in an RV on your own land in Gillespie County is allowed: Unincorporated Gillespie County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Gillespie County has no zoning ordinance. The county legal census found no county zoning ordinance, citing gillespiecounty.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 Gillespie County, Texas?

Land in Gillespie County runs about $3,993 per acre, based on the latest county data.

What is the water situation in Gillespie County?

Gillespie County gets about 30.1" of rain a year, with severe drought in roughly 46% of years. On water rights, Gillespie County lies in the Hill Country Priority Groundwater Management Area — TCEQ PGMA identifying existing or anticipated critical groundwater problems; drives GCD coverage and heightened management. Domestic/livestock wells remain exempt from GCD permits but spacing/registration may apply..

How remote is Gillespie County?

A representative private-land location has about 2,167 people within a 30-minute drive and 4,464,210 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 Gillespie County means bringing your own water and power. The kit we’d start with:

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How Gillespie compares in Texas

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