Bolthole Index

Terrell County, Texas

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

33Index Score / 100
#249 of 254 in Texas

Unincorporated Terrell County, Texas does not require a residential building permit and has no county zoning12. Septic permits go through TCEQ unless an approved local program is in place; we could not confirm which authority currently accepts Terrell County applications3. Private wells fall under the Terrell County Groundwater Conservation District4.

At a glance

Building permit
Not required for an ordinary home in unincorporated Terrell County; no county permit or inspection department is listed1
Zoning
No county zoning applies in unincorporated Terrell County52
Septic permits
Permits, approved plans, and a construction inspection are generally required; confirm whether Terrell County or TCEQ accepts applications367
RV / tiny home living
Unrestricted by county zoning rules in the unincorporated area, but septic rules still apply28
Minimum size / lot / setbacks
No county zoning minimums in the unincorporated area2
Owner-builder
No explicit county owner-builder exemption was confirmed; septic owner-installation has separate conditions96
Private wells
Every well must be registered; non-exempt wells also need an Operating Permit4
Septic soils
Only 11.9% of county soils lack severe limits for a conventional drain field10

Who to call

Also useful

Terrell County Judge's Office

General county questions and a starting point for current building, septic, floodplain, and county-road contacts

(432) 345-2421

105 E Hackberry St, Sanderson, TX 79848

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Off-grid gear

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

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

An ordinary home in unincorporated Terrell County does not require a county residential building permit1. The county does not publish an express no-permit ordinance, so ask the Terrell County Judge's Office to confirm the answer for the parcel before ordering materials111. Texas grants counties only limited building authority, and the County Judge's Office is the right place to ask whether floodplain review, subdivision approval, or another site-specific process applies1211. The courthouse is at 105 E Hackberry St in Sanderson, and the phone number is (432) 345-242111. Modular or industrialized housing follows a separate statewide code program even where the county does not issue a conventional house permit13.

Who is the Terrell County building department?

Terrell County does not list a building department, building inspector, planning office, or zoning office15. The practical first call for an unincorporated parcel is the Terrell County Judge's Office at the courthouse in Sanderson, (432) 345-242111. Ask that office to identify the current contact for OSSF applications, floodplain questions, subdivision review, and access from a county road; we could not confirm the procedures or fees for those topics. TCEQ is the septic permitting authority unless an approved local government program applies, and we could not confirm which authority currently accepts Terrell County applications3. Access from a Texas state highway follows TxDOT's process instead: the applicant submits Form 1058 and must receive an executed permit before beginning work in the highway right of way14.

Does Terrell County have zoning?

Unincorporated Terrell County has no county zoning ordinance, and Texas law does not give Terrell County general county zoning authority215. County zoning therefore sets no minimum dwelling size, minimum lot size, setback, lot-coverage limit, building-height limit, or zoning district for an unincorporated parcel2. County zoning also does not restrict accessory dwellings, manufactured homes, RV occupancy, tiny-home occupancy, or temporary camping there2. That answer is limited to county zoning: deed restrictions, easements, subdivision documents, flood hazards, septic design, well rules, and a state-highway access permit can still shape what works on a particular tract. The county's published materials do not confirm whether any separate local rules apply within Sanderson, so a parcel there deserves a direct local inquiry rather than the unincorporated-county answer5.

How do septic permits work in Terrell County?

TCEQ is the OSSF permitting authority unless an approved local program applies; ask the Terrell County Judge's Office who currently accepts applications311. A permit and approved plan are generally required before constructing, altering, repairing, extending, or operating a septic system or holding tank68. Before the system is ready, the installer must give the permitting authority at least 5 working days' notice, and the authority must conduct a construction inspection7. A failed system cannot be used until it passes; after a passing inspection, the authority must issue written approval within 7 calendar days7. The authorization to construct expires after 1 calendar year if no construction inspection is requested7. The conditional 10-acre exemption still requires every listed safeguard, including 100 feet from every OSSF part to the property line7. Only 11.9% of county soils lack severe limits for a conventional drain field, so complete the site evaluation before fixing the house location or system budget10.

Can you live in an RV or tiny home in Terrell County?

County zoning does not restrict RV occupancy, tiny-home occupancy, manufactured-home occupancy, accessory dwellings, or temporary camping on land in unincorporated Terrell County2. County zoning also sets no minimum dwelling size or minimum lot size there2. Sanitation is the important separate issue: an OSSF or holding tank generally needs a permit and approved plan unless every condition of a state exception is satisfied8. A large tract alone does not create an automatic septic exemption because the state rule also requires a qualifying single-family dwelling, professional site evaluation, property-line separation, on-site effluent disposal, and protection against nuisance or groundwater pollution16. Terrell County's published sources do not confirm a certificate-of-occupancy process, so ask the County Judge's Office about the current treatment of the specific structure before moving it onto the property111.

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

  1. Confirm that the parcel is in unincorporated Terrell County and ask the County Judge's Office about floodplain, subdivision, county-road access, and any site-specific review11.
  1. Ask the County Judge's Office whether the county or TCEQ currently accepts OSSF applications, then arrange the site evaluation and obtain the required permit and approved plan unless every condition of an exemption applies1136.
  1. Have the septic installer give at least 5 working days' notice before the system is ready, and do not use a failed system until it passes its construction inspection7.
  1. Register any existing or proposed well with the Terrell County Groundwater Conservation District; obtain an Operating Permit before work on a non-exempt well4.
  1. For access onto a state highway, submit Form 1058 to TxDOT and wait for the executed driveway permit before construction in the right of way14.
  1. Confirm the final building answer with the county, then build without a county residential permit if the site remains within the ordinary unincorporated-home finding1.

What should you check before buying land in Terrell County?

Check water and wastewater feasibility before closing. Every private well must be registered with the Terrell County Groundwater Conservation District, while a well used only for domestic purposes is exempt from the Operating Permit requirement but still must meet registration and construction rules4. Terrell County receives about 14.5 inches of precipitation annually and experiences severe drought in about 24.2% of years, making a dependable water plan especially important1718. Only 11.9% of county soils lack severe limitations for a conventional septic drain field, so price the site evaluation and possible alternative design early10. About 75.8% of the land has a slope of 15% or less, but a parcel-level survey still matters for drainage and access19. The county averages 0.3 people per square mile, and the nearest city of 100,000 or more is about 119 miles from the county center, so contractor travel and material delivery can materially affect a project budget2021.

Watch-outs

  • Terrell County does not publish an express no-permit statement; confirm the residential building-permit answer for the parcel with the County Judge's Office111.
  • We could not confirm whether Terrell County or TCEQ currently accepts OSSF applications; call the County Judge's Office for the current permitting authority and application route311.
  • A county-road driveway process and fee could not be confirmed; ask the County Judge's Office for the current Road & Bridge contact, while state-highway access goes through TxDOT1114.

Sources

  1. Terrell County, Texas - Official Site (2026 county census)
  2. Texas law on county zoning and building authority
  3. On-Site Sewage Facility Rules Compilation, quoted and re-checked
  4. Terrell County Groundwater Conservation District Rules, quoted and re-checked
  5. Terrell County, Texas - Official Site (2026 county census)
  6. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  7. Chapter 285 – On-Site Sewage Facilities, quoted and re-checked
  8. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  9. Exemptions to Electrician Licensing (2026 county census)
  10. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  11. Terrell County Judge's Office (co.terrell.tx.us)
  12. Local Government Code Chapter 233, County Regulation of Housing and Other Structures (Texas statewide rule), quoted and re-checked
  13. Industrialized Housing and Buildings – Adoption of New Code Editions (Texas statewide rule), quoted and re-checked
  14. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  15. Local Government Code Chapter 231, County Zoning Authority (Texas statewide rule), quoted and re-checked
  16. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  17. Annual precipitation: Bolthole Index county data
  18. Share of years in severe drought: Bolthole Index county data
  19. Share of land at 15% slope or less: Bolthole Index county data
  20. Population density: Bolthole Index county data
  21. Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data

Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like 5 of its 6 neighbors, Terrell County has no countywide zoning.

RuleTerrell CountyPecos CountyCrockett CountyBrewster CountyVal Verde CountyUpton CountyReagan County
Building permitNot requiredNot requiredLimitedNot requiredLimitedNot requiredNot required
County zoningNoNoNoNoYesNoNo
Septic permitsTerrell CountyPecos CountyTCEQCounty OSSFCounty Health Dept.UptonTCEQ

County locator

Terrell County in Texas

33
County map
Terrell County highlighted among the Texas counties · colored by Index score

How Terrell County scores

Seclusion91100% ev.
Self-Sufficiency896% ev.
Admin Boringness8290% ev.
Durability39100% ev.
Property Autonomy71100% ev.
Carry Cost8196% 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 →

$110kTypical home
0.8%Property tax
$1,263Land / acre
14.5"Annual rain
24.2% of yrsSevere drought
56.1 / yr (+37.8)Mid-century 100°F days
37.5 daysMid-century dry spell
1.22" (+8.6%)Mid-century 1-day rain
1.22×Wildfire change factor
100%Forward climate coverage
$1,920Home insurance / yr
-0.1% / yrInsurance growth
0%Nonrenewal rate
single ZIP shrunk to state medianInsurance basis
42Radius comparison (15 mi)
0.3People / sq mi
0%Federal land
75.8%Land at 15% slope or less
11.9%Soils rated "not limited" for septic (strict USDA rating)
179,580 acWorkable land screen
3.5%Wooded land
1.7 tonsBiomass / forest ac
67.2°FAvg temp

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Answers from the rulebook for Terrell County

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

Terrell County rules

  • Zoning districts · by state lawNo county rule

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Unincorporated Terrell County: no county rule sets this, because Terrell County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing co.terrell.tx.us.

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

    Water wells within the jurisdiction of the Terrell County Groundwater Conservation District

    • All existing and new wells must be registered with the District.
    • A new well or well system that is not exempt under Rule 3.5 must obtain an Operating Permit before drilling, construction, or operation.
    • Drilling or operating a well used solely for domestic use purposes is exempt from the District's permitting requirements, but exempt wells must still be registered.
    • Exempt wells must comply with casing, pipe, fitting, pollution-prevention, and spacing requirements.
    • A well loses exempt status if subsequently used for a non-exempt purpose or manner.

    livestock/poultry exemption tract size: > 10 acres (well must also be incapable of producing more than 25,000 gallons per day) · livestock/poultry exemption production capacity: <= 25000 gallons per day (well must be on a tract larger than 10 acres) · new-well drilling location tolerance: <= 30 feet (from location specified in registration or permit application)

    “All water wells, both existing and new, must be registered with the District and are required to comply with the District’s registration requirements in these Rules.”
  • County-wide zoningAbsent

    No county planning or zoning office is listed on the official county site; Texas counties have no general zoning authority in unincorporated areas.

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

Texas rules that apply here

  • Building permitLimited

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

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

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

    • Electrical work is exempt from state electrician licensing when performed on a dwelling the person owns and resides in.
    • Plumbing is exempt from state plumbing licensing when performed by the property owner in the property owner's homestead.
    • Air-conditioning and refrigeration contracting is exempt from the applicable state registration requirements when performed in a building owned solely by the person as the person's home.
    • These exemptions do not establish a blanket exemption for every construction trade or contractor-regulated activity.
    “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed as electricians.”
    One more reviewed finding on this topic
    • Conditional — Electrical work on a dwelling owned and occupied by the property owner in Texas.
      “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed”
  • 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:”
    One more reviewed finding on this topic
    • Partial — Industrialized housing and buildings, modules, and modular components built for Texas under the Industrialized Housing and Buildings program.
      “Effective July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
  • Who permits septicMixed (with conditions)

    OSSF permitting, inspection, and administration throughout Texas.

    • TCEQ administers the program in areas where no local jurisdiction has been authorized.
    • A local governmental entity may administer the program only after an order, ordinance, or resolution is approved by TCEQ.
    • The authorized agent administers the program within its approved area of jurisdiction.
    • Local programs may adopt requirements more stringent than state minimums.
    “The authorized agent is responsible for the proper implementation of Texas Health and Safety Code, Chapter 366, 30 TAC Chapter 285, including reviewing OSSF permit applications, conducting inspections, investigating complaints, and more.”
    2 more reviewed findings on this topic
    • Mixed (with conditions) — OSSF and septic-system permitting authority applicable in Terrell County, Texas
      “The executive director is the permitting authority unless a local governmental entity has an OSSF order, ordinance, or resolution approved by the executive director.”
    • Mixed — On-site sewage facilities, including septic systems, throughout Texas
      “TCEQ is not often the OSSF permitting authority. [...] The TCEQ regional office will be the permitting authority in locations where a local jurisdiction has not been authorized.”
  • Septic permitRequired

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

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

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

    “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    2 more reviewed findings on this topic
    • Required — Construction, installation, alteration, repair, extension, or operation of an OSSF, including septic systems and holding tanks, in Terrell County
      “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    • Required — Construction, installation, alteration, extension, or repair of an OSSF in Texas
      “A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
  • Septic inspectionLimited

    Construction inspections for on-site sewage facilities in Terrell County under the Texas baseline rule, subject to any approved local governmental OSSF order, ordinance, or resolution.

    • An authorization to construct is valid for one calendar year; if the installer does not request a construction inspection within that year, the authorization expires and a new application and application fee are required before installation, unless the owner decides not to install an OSSF.
    • The installer must notify the permitting authority at least five working days (Monday through Friday, excluding holidays) before the OSSF will be ready for inspection.
    • The permitting authority shall conduct a construction inspection.
    • If the OSSF fails inspection, it cannot be used until it passes inspection; the permitting authority must advise the owner or agent at the inspection and issue a deficiency letter within seven calendar days.
    • A reinspection fee may be assessed and must be paid before reinspection.
    • Within seven calendar days after a passing construction inspection, the permitting authority shall issue a written notice of approval with a unique identification number.
    • The permitting authority is the TCEQ executive director unless a local governmental entity has an OSSF order, ordinance, or resolution approved by the executive director; an approved local agent administers the program within its approved area of jurisdiction.
    • The permitting, operation, and installation requirements do not apply when the OSSF is not creating a nuisance and it was installed before September 1, 1989, without alteration and without need of repair; or it was installed before the effective date of a qualifying pre-September 1, 1989 local order, ordinance, or resolution, without alteration and without need of repair; or the owner received authorization to construct before the effective date of the chapter.
    • No planning materials, permit, and inspections are required for an OSSF serving a single-family dwelling on a tract of land that is ten acres or larger if the OSSF meets Chapter 285 Subchapter D requirements, is not causing a nuisance or polluting groundwater, all parts are at least 100 feet from the property line, effluent is disposed of on the property, and the single-family dwelling is the only dwelling on the tract.
    • Connecting recreational vehicles or manufactured homes to rental spaces is not construction if the existing OSSF is not altered.
    • A federally owned tract with separately leased individual parts treats each leased part as a separate tract for Chapter 285 purposes.

    inspection-notice period: 5 working days (Monday through Friday, excluding holidays) · authorization-to-construct validity: 1 calendar year (If no construction inspection is requested within this period, the authorization expires.) · notice of approval deadline after passing inspection: 7 calendar days · large-tract exception minimum size: >= 10 acres (Single-family dwelling only and all listed conditions must be satisfied.) · large-tract exception property-line separation: >= 100 feet (Applies to all parts of the OSSF.)

    “(2) The installer shall notify the permitting authority at least five working days (Monday through Friday, excluding holidays) before the date the OSSF will be ready for inspection. (3) The permitting authority shall conduct a construction inspection.”
    2 more reviewed findings on this topic
    • Limited — OSSF installation and, where applicable, maintenance inspections in Texas
      “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.”
    • Limited — OSSFs using secondary treatment or drip irrigation in Texas.
      “A system using secondary treatment or drip irrigation must be inspected by a valid maintenance company once every four months, or be maintained by the single family homeowner, where allowed.”
  • Off-grid sanitationLimited

    Use of an on-site or other non-public-sewer sanitation system, including an OSSF or holding tank, in Terrell County

    • Off-grid sanitation is subject to the OSSF permit and approved-plan requirements unless a stated exemption applies.
    • The system must comply with applicable planning, construction, installation, operation, and maintenance standards.
    • A 10-acre single-family-dwelling exemption may apply only if all listed TCEQ conditions are satisfied.
    • Emergency repairs are exempt from permitting only when they meet the listed emergency-repair conditions and are reported within 72 hours.
    • Local permitting requirements may be more stringent.

    minimum tract size for 10-acre exemption: >= 10 acres (single-family dwelling and all other exemption conditions must also be met) · minimum OSSF setback for 10-acre exemption: >= 100 feet from property line (all parts of the OSSF)

    “Permits are required for on-site sewage facilities (OSSFs) including septic systems and holding tanks.”
    2 more reviewed findings on this topic
    • Limited — Composting toilets used as on-site sewage facility treatment systems in Texas.
      “Composting toilets will be approved by the executive director provided the system has been tested and certified under NSF International Standard 41 (1999) or under any other standards approved by the executive director.”
    • Limited — Off-grid wastewater sanitation through an OSSF in Texas.
      “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”:”
  • 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”
  • Permit processPublished (with conditions)

    On-site sewage facilities, including septic systems and holding tanks, located in Terrell County and elsewhere in Texas.

    • A permit and approved plan are required to construct, alter, repair, extend, or operate an OSSF.
    • Applications and planning materials must be submitted to the permitting authority; the TCEQ regional office is the permitting authority where a local jurisdiction has not been authorized.
    • The permitting authority must approve or deny the planning materials and permit application within 30 days of receipt and must provide a written explanation if denied.
    • The 10-acre exemption requires compliance with all other 30 TAC Chapter 285 requirements, a site evaluation by a TCEQ-licensed Site Evaluator or professional engineer, service to a single-family dwelling on a tract of at least 10 acres, no nuisance or groundwater pollution, all OSSF parts at least 100 feet from the property line, on-site effluent disposal, and no other dwelling on the tract.
    • Emergency repairs are exempt from permitting but must be reported in writing to the permitting authority within 72 hours after repairs begin.
    • A grandfathered OSSF may not need a permit if it was installed before a local program was authorized or before September 1, 1989, whichever is earlier, and is not creating a nuisance, does not need repair, and has not had a significant increase in use or otherwise been altered.
    • Owner-installation depends on whether the permitting authority allows it; otherwise the owner must own the single-family dwelling and property, must not develop any part of the property for sale or lease, and must meet all permitting, construction, and maintenance requirements. If another person assists, that person must generally be a properly licensed installer, subject to the stated electrician and tank-delivery exceptions.

    permit application review deadline: 30 days (The deadline runs from receipt of the planning materials and permit application.) · 10-acre exemption tract size: >= 10 acres (All stated 10-acre-rule conditions must also be met.) · minimum distance of all OSSF parts from property line: >= 100 feet (Applies to the 10-acre exemption.) · emergency-repair reporting deadline: <= 72 hours (Written report required after repairs have begun.)

    “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    One more reviewed finding on this topic
    • Published (with conditions) — Constructing a new driveway or revising an existing driveway on the right of way of a Texas state highway.
      “The applicant shall complete and submit to TxDOT a Form 1058”
  • county zoning authorityLimited

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

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

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

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

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

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

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

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

Still unanswered

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

  • Inspections — Residential building inspections in unincorporated Terrell County, Texas
  • Certificate of occupancy — Certificates of occupancy for residential buildings in unincorporated Terrell County, Texas
  • Local zoning — Aggregate local zoning across Terrell County, including any incorporated or subordinate local authority.
  • Mandatory utility hookup — Required connection to public water or sewer utilities for property in Terrell County
  • Agricultural exemption — Potential agricultural-use exemption from subdivision plat requirements for land in Terrell County, Texas.
4 more unanswered
  • Subdividing land
  • Building in a floodplain
  • Short-term rentals
  • Permit fees

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 Terrell County, Texas

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

Terrell County scores 33/100 on the Bolthole Index, a marginal county profile. Its strengths: deep seclusion — about 42 people within 15 miles and low administrative friction for a quiet rural property. Watch-outs: weak self-sufficiency basics: only 14.5″ of rain a year, in severe drought 24.2% of years and elevated mid-century heat, water, rain, or wildfire exposure.

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

Terrell County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Terrell County (TCEQ authorized agent for on-site sewage). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

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

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

How much does land cost in Terrell County, Texas?

Land in Terrell County runs about $1,263 per acre, based on the latest county data.

What is the water situation in Terrell County?

Terrell County gets about 14.5" of rain a year, with severe drought in roughly 24.2% of years.

How remote is Terrell County?

A typical private-land location has about 42 people within 15 miles and 249,542 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Terrell compares in Texas

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