Bolthole Index

Knox County, Texas

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

51Index Score / 100
#131 of 254 in Texas

Unincorporated Knox County, Texas does not require a building permit for an ordinary home and has no county zoning approval, but the statewide building energy code still applies123. Septic work generally requires a septic permit and approved plan; qualifying single-family systems on larger tracts may be exempt45. Water wells and state-highway driveways have separate permit or registration rules67.

At a glance

Building permit
Not required for an ordinary home in unincorporated Knox County1
Zoning
No county zoning in unincorporated Knox County28
Septic permit
Generally required; a narrow exemption may apply910
Water well
A district permit or registration may be required6
RV / tiny home
No county zoning restriction in unincorporated areas; sanitation rules still apply89
Owner-builder
A narrow notice-penalty exemption applies to some self-built primary homes11
State-highway driveway
TxDOT permit required before right-of-way construction7
Subdivision
Dividing land may trigger platting outside municipal limits12

Who to call

Septic permits

TCEQ Region 3 (Abilene) Office

OSSF (septic) permitting authority for Knox County. TCEQ's own county lookup tool returns this office, not a city or county authorized agent, as Knox County's permitting authority, matching Knox County's own website, which names no Sanitarian, health, or septic office of its own.

325-698-9674

1977 Industrial Blvd, Abilene, TX 79602-7833

Online permits →

Well permits

Rolling Plains Groundwater Conservation District

Permits and registers water wells in its territory, which includes Knox County. Its own rules require a District permit before drilling or increasing production above 25,000 gallons per day, with narrower exemptions for small domestic and livestock wells.

(940) 422-1095

info@rollingplainsgcd.gov

110 W California Street, Seymour, TX 76380

Also useful

Knox County Judge / Commissioners Court

Presides over Commissioners Court, the county's governing body; general point of contact for county roads and anything not covered by a named county office. Knox County's own office list names no building, zoning, or planning department.

940-459-2191

P.O. Box 77, Benjamin, Texas 79505

Contact details are copied from each office’s official page and were checked against it on October 7, 2026.

Off-grid gear

Going off-grid in Knox 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 Knox County, Texas?

An ordinary home in unincorporated Knox County does not require a county building permit1. Texas gives counties only limited building-regulation powers, and Knox County has not published a general building-permit program131. The statewide energy code still applies: the state minimum for a single-family home is the energy chapter of the state-adopted residential code, while other residential, commercial and industrial buildings follow the state-adopted energy conservation code3. Industrialized housing and buildings also follow a separate state program, including an installation-permit option for a personal-use buyer14. The owner-builder provision is only a notice-penalty exemption for a qualifying self-built primary home, not a general exemption from building codes, inspections or building permits11.

Who issues building permits in Knox County, and how do you reach them?

Knox County does not list a building department or zoning office for ordinary residential construction in unincorporated areas12. Inside a municipality, ask the city about its own building permit and zoning approval; septic permits remain a separate question, and TCEQ Region 3 is the listed starting point at 1977 Industrial Blvd, Abilene, TX 79602-7833 or 325-698-967415. For a water-well permit or registration, contact the Rolling Plains Groundwater Conservation District at 110 W California Street, Seymour, TX 76380 or (940) 422-109516. The Knox County Judge / Commissioners Court is the starting point for county-road access and county procedures not assigned to a named office; its mailing address is P.O. Box 77, Benjamin, Texas 79505, and its phone is 940-459-219117. Ask that office about the current filing path before dividing land because Knox County has not published a county-specific subdivision application, fee schedule or named plat authority1217.

Does Knox County have zoning?

Unincorporated Knox County has no county zoning ordinance or county zoning approval2. Texas law grants county zoning power only in limited special areas, rather than giving every county general zoning authority18. Knox County zoning therefore does not set a minimum dwelling size, minimum lot size, setback, height limit, lot coverage rule or zoning district in unincorporated territory8. County zoning also does not restrict accessory dwellings, RV occupancy, tiny-home occupancy, manufactured-home occupancy or temporary camping there8. Septic permits, groundwater rules, access permits, subdivision platting, deed restrictions and municipal rules remain separate. Inside a city, ask the city about its building permits and zoning approval; septic questions still start with the listed septic authority15. Outside municipal limits, dividing land into lots, a subdivision or designated shared-use areas may require a plat, subject to statutory exceptions and municipal extraterritorial-jurisdiction arrangements12.

How do septic permits work in Knox County?

Constructing, installing, altering, extending or repairing an OSSF in Knox County generally requires a septic permit and approved plan4. The permitting authority must approve or deny the planning materials and application within 30 days; a denial must include a written explanation19. Where TCEQ administers the program, the published application fee is $200 for a single-family OSSF or $400 for another system, plus $10 per permit; reinspection costs half the original permit fee20. The installer must notify the authority at least five working days before inspection21. A single-family system on at least 10 acres needs no planning materials, permit or inspection only when every condition is met, including at least 100 feet from each system part to the property line, on-site effluent disposal, no nuisance or groundwater pollution, and no other dwelling on the tract5. Only about 11.6% of county soils avoid a severe conventional-drain-field rating, so settle the site evaluation and design before choosing a homesite22.

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

County zoning does not restrict RV, tiny-home or manufactured-home occupancy on unincorporated Knox County land8. Off-grid living does not waive sanitation rules: an OSSF generally needs a septic permit and approved plan unless a system serving one single-family dwelling satisfies every condition of the narrow exemption45. Industrialized housing follows a separate Texas program, including an installation-permit route for a buyer obtaining a unit for personal use14. We could not confirm a Knox County utility-connection rule, short-term-rental ordinance or county certificate-of-occupancy procedure; ask the County Judge / Commissioners Court about a parcel outside city limits and the relevant municipality about city building permits or zoning approval17. Septic permits remain separate from either building-permit path; start with TCEQ Region 315.

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

  1. Confirm whether the parcel is outside municipal limits and whether a proposed division requires a plat12.
  2. Arrange the OSSF site evaluation and ask TCEQ Region 3 whether the project needs a septic permit or meets every exemption condition155.
  3. Apply for the septic permit and budget the published state fees when TCEQ administers the application420.
  4. Ask the Rolling Plains Groundwater Conservation District whether a planned well needs a permit or registration before drilling616.
  5. For a new or changed connection to a state highway, submit TxDOT Form 1058 and wait for the executed driveway permit before starting right-of-way work7.
  6. Give the septic authority the required advance notice and pass the construction inspection before using the system21.

What to check before you buy land in Knox County

Check legal access first. A driveway connecting to a state highway requires a TxDOT permit, while Knox County has not published a county-road driveway rule; ask the County Judge / Commissioners Court about a county-road approach717. Check the deed and survey for whether a sale or planned split triggers subdivision platting outside municipal limits12. For water, the Rolling Plains Groundwater Conservation District generally requires a permit before drilling unless an exemption applies, and many exempt wells still require registration6. For wastewater, only about 11.6% of soils are rated without severe limits for a conventional drain field22. Knox County averages about 25.3 inches of precipitation, and severe drought occurred in about 39.3% of years, so verify well yield and storage plans rather than relying on annual rainfall alone2324.

Watch-outs

  • The owner-builder rule is only a notice-penalty exemption for a qualifying self-built primary residence; it is not a general exemption from codes, permits, inspections or occupancy requirements11.
  • Do not start a new or modified driveway on state-highway right of way until TxDOT has issued the executed permit and received the required 24-hour notice7.
  • We could not confirm Knox County's current local subdivision filing procedure, fee schedule or plat-approving office; ask the County Judge / Commissioners Court before dividing a tract1217.

Sources

  1. Knox County, Texas official website (2026 county census)
  2. Knox County, Texas official website (2026 county census)
  3. Local Ordinances, quoted and re-checked
  4. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  5. On-Site Sewage Facility Rules Compilation, quoted and re-checked
  6. Groundwater Conservation District Information, quoted and re-checked
  7. Access Management Manual, Section 4: Driveway Permits, Design, and Materials, quoted and re-checked
  8. Texas law on county zoning and building authority
  9. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  10. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  11. Local Government Code Chapter 233. County Regulation of Housing and Other Structures, quoted and re-checked
  12. Local Government Code Chapter 232, County Regulation of Subdivisions, quoted and re-checked
  13. Local Government Code Chapter 233, County Regulation of Housing and Other Structures (Texas statewide rule), quoted and re-checked
  14. tdlr.texas.gov (Texas statewide rule), quoted and re-checked
  15. TCEQ Region 3 (Abilene) Office (tceq.texas.gov)
  16. Rolling Plains Groundwater Conservation District (rollingplainsgcd.gov)
  17. Knox County Judge / Commissioners Court (knoxcountytexas.org)
  18. Local Government Code Chapter 231, County Zoning Authority (Texas statewide rule), quoted and re-checked
  19. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  20. On-Site Sewage Facility Rules Compilation, quoted and re-checked
  21. On-Site Sewage Facility Rules Compilation, quoted and re-checked
  22. 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
  23. Annual precipitation: Bolthole Index county data
  24. Share of years in severe drought: Bolthole Index county data

Written October 7, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

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

RuleKnox CountyFoard CountyHaskell CountyBaylor CountyKing CountyStonewall CountyThrockmorton County
Building permitNot requiredNot requiredLimitedNot requiredNot requiredNot requiredNot required
County zoningNoNoNoNoNoNoNo
Septic permitsTCEQTX Commission on Env. QualityTCEQBaylor CountyTX Commission on Env. QualityTCEQThrockmorton County

County locator

Knox County in Texas

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

How Knox County scores

Seclusion87100% ev.
Self-Sufficiency2396% ev.
Admin Boringness8290% ev.
Durability29100% ev.
Property Autonomy71100% ev.
Carry Cost80100% 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 →

$83kTypical home
1.9%Property tax
$1,983Land / acre
25.3"Annual rain
39.3% of yrsSevere drought
62.9 / yr (+33)Mid-century 100°F days
29.9 daysMid-century dry spell
1.75" (+6%)Mid-century 1-day rain
1.31×Wildfire change factor
100%Forward climate coverage
$2,555Home insurance / yr
-3% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
206,643People within 2 hr
2,097Radius comparison (15 mi)
3.9People / sq mi
0.5%Federal land
100%Land at 15% slope or less
11.6%Soils rated "not limited" for septic (strict USDA rating)
62,134 acWorkable land screen
11.1%Wooded land
4.8 tonsBiomass / forest ac
64.2°FAvg temp

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Cities and towns in Knox County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Benjamin · Goree · Town of Knox City · Munday

Answers from the rulebook for Knox County

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

Knox County rules

  • Zoning districts · by state lawNo county rule

    Unincorporated Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 Knox County: no county rule sets this, because Knox 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 knoxcountytexas.org.

    • 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 in the Rolling Plains Groundwater Conservation District portion of Knox County, including domestic, livestock, irrigation, and other wells.

    • Except for wells exempt under Rule 8.5, a District permit is required before drilling or increasing production or pumping capability above 25,000 gallons per day.
    • Exempt wells must generally be registered with the District before drilling.
    • Domestic or livestock wells producing less than 25,000 gallons per day on parcels greater than 10 acres are exempt from permitting but require registration.
    • Domestic or livestock wells with a pump of one-half horsepower or less on parcels less than 10 acres are exempt from permitting.
    • Petroleum-rig wells meeting the stated Railroad Commission conditions are exempt from permitting but must be registered and metered.
    • A well permit application is subject to District rules, required information, and District review.

    permit threshold: > 25000 gallons per day (Certain Rule 8.5 exemptions apply.) · equivalent permit threshold: 17.36 gallons per minute (District rule states this is equivalent to 25,000 gallons per day.) · domestic/livestock exemption parcel size: > 10 acres (Well must produce less than 25,000 gallons per day.) · small-pump exemption: <= 0.5 horsepower (Domestic or livestock use on parcels less than 10 acres.)

    “Except for those wells exempt under Rule 8.5, a person is required to obtain a permit from the District.”
  • County-wide zoningAbsent

    No county zoning ordinance is evident; Texas counties generally cannot zone unincorporated land.

    Knox County, Texas official website ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • Building permitLimited

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

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

    An individual subject to Texas Local Government Code Chapter 233 residential construction notice penalties who builds the new residential construction or acts as the individual's own contractor and intends to use the residence as the individual's primary residence.

    • This is an exemption from the penalty under Section 233.157(c) for failure to provide required notices; it is not stated to be an exemption from building codes, inspections, permits, or certificates of compliance.
    • The underlying residential subchapter applies only to a county that has adopted a resolution or order requiring its application and meets the statutory geographic or population condition.
    • The individual must build the construction or act as the individual's own contractor.
    • The individual must intend to use the residence as the individual's primary residence.
    “An individual who fails to provide proper notice in accordance with Sections 233.154(b) and (c) is not subject to a penalty under this subsection if: (1) the new residential construction is built by the individual or the individual acts as the individual's own contractor; and (2) the individual intends to use the residence as the individual's primary residence.”
    2 more reviewed findings on this topic
    • Conditional — An owner performing electrical, plumbing, or air-conditioning and refrigeration work on the owner's own residence or homestead in Texas.
      “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed as electricians.”
    • Conditional — Electrical work on a dwelling owned and occupied by the property owner in Texas.
      “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed”
  • Building code adoptedPartial

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

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

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

    “July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
    2 more reviewed findings on this topic
    • Adopted (with conditions) — Statewide Texas building-energy-code requirements, including construction in Knox County.
      “The minimum state-mandated code for single-family homes is Chapter 11 of the 2015 International Residential Code. The applicable code for other residences and commercial and industrial buildings is the 2015 International Energy Conservation Code. These energy codes are effective statewide.”
    • Partial — Industrialized housing and buildings, modules, and modular components built for Texas under the Industrialized Housing and Buildings program.
      “Effective July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
  • 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.”
    One more reviewed finding on this topic
    • 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 permitLimited

    Certain OSSFs in Knox County may be exempt from permitting under the statewide 10-acre rule or emergency-repair exception, subject to all listed conditions and confirmation by the local permitting authority.

    • The OSSF must comply with all other planning, construction, and installation standards of 30 TAC Chapter 285.
    • For the 10-acre rule, the property must receive a site evaluation by a TCEQ-licensed Site Evaluator or Professional Engineer.
    • The OSSF must serve a single-family dwelling on a tract of land that is 10 acres or larger and not be required to have a permit from the local permitting authority.
    • The OSSF must not cause a nuisance or pollute groundwater.
    • All parts of the OSSF must be at least 100 feet from the property line.
    • Effluent must be disposed of on the property.
    • The single-family dwelling must be the only dwelling located on the tract.
    • Emergency repairs are not subject to a permit, but must be reported to the permitting authority in writing within 72 hours after repairs have begun.
    • The TCEQ page states that grandfathered or 10-acre status should be confirmed with the local permitting authority.

    minimum tract size: >= 10 acres · minimum setback from property line: >= 100 feet · emergency-repair reporting deadline: <= 72 hours (after repairs have begun)

    “An OSSF may be exempt from permitting [...] A permit is also not required for emergency repairs”
    4 more reviewed findings on this topic
    • Required — Construction, installation, alteration, extension, or repair of an on-site sewage facility, including septic systems, in Knox County where no applicable exemption applies.
      “A permit and approved plan are required to construct”
    • Limited — Construction, installation, alteration, extension, repair, and operation of on-site sewage facilities, including septic systems, in Texas, including Knox County.
      “A permit is required to construct, install, alter, extend, or repair an OSSF. Always check with your local permitting authority. Local permitting programs can be more stringent than State minimums.”
    • Required — Construction, installation, alteration, extension, or repair of an OSSF in Texas
      “A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
    • Required — 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 to construct, alter, repair, extend, and operate an OSSF.”
  • Septic inspectionLimited

    Construction inspection of permitted on-site sewage facilities in Knox County, Texas.

    • The installer must notify the permitting authority at least five working days before the OSSF is ready for inspection.
    • The permitting authority shall conduct a construction inspection.
    • If the OSSF fails inspection, it cannot be used until it passes inspection.
    • A reinspection fee may be assessed and must be paid before reinspection.
    • The 10-acre single-family-dwelling exception eliminates inspection only when all listed exception conditions are met.

    inspection notice period: 5 working days (Monday through Friday, excluding holidays.) · reinspection fee: may be assessed (Must be paid before reinspection.)

    “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

    Off-grid wastewater sanitation through an OSSF in Texas.

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

    10-acre exemption tract size: >= 10 acres (all TCEQ conditions must be satisfied) · 10-acre exemption OSSF setback: >= 100 feet from property line (all parts of the OSSF)

    “An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
    2 more reviewed findings on this topic
    • Limited — On-site sanitation using an OSSF for a single-family dwelling in Knox County, Texas.
      “No planning materials, permit, or inspection are required for an OSSF for a single family dwelling located on a tract of land that is ten acres or larger and: (A) the OSSF is not causing a nuisance or polluting groundwater; (B) all parts of the OSSF are at least 100 feet from the property line; (C) the effluent is disposed of on the property; and (D) the single family dwelling is the only dwelling located on that tract of land.”
    • 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.”
  • Subdividing landRegulated (with conditions)

    Subdivision platting for a tract located outside municipal limits in Texas, including unincorporated Knox County, when the owner divides the tract into two or more parts to lay out a subdivision, lots, or designated public-use or lot-owner-use areas.

    • The quoted state rule applies outside municipal limits.
    • Section 232.0015 and other Chapter 232 subchapters provide exceptions and specialized applicability rules.
    • Municipal limits and any applicable municipal extraterritorial-jurisdiction agreement may affect which authority regulates the subdivision.
    • The official Knox County website opened for this research did not identify a county-specific subdivision ordinance, application, fee schedule, or designated plat-approving authority.
    “Sec. 232.001. PLAT REQUIRED. (a) The owner of a tract of land located outside the limits of a municipality must have a plat of the subdivision prepared if the owner divides the tract into two or more parts to lay out:”
  • Driveway accessRequired

    New or modified access driveways connecting property in Knox County to a highway on the Texas State Highway System, including state highway right-of-way access.

    • The applicant should contact the local TxDOT District office.
    • TxDOT Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way, must be submitted.
    • The application must include a description of the proposed work, applicant name, mailing address, telephone number, and proposed driveway location.
    • The application must be made by the property owner or authorized representative representing all parties in interest.
    • The application must be for the bona fide purpose of securing or changing access to the owner's property, not parking or servicing vehicles on state highway rights of way.
    • No driveway construction may begin on the right of way until a fully executed permit is received and the applicant gives TxDOT 24-hour notification.
    • The driveway must be constructed according to the fully executed permit and applicable regulations; TxDOT inspection determines whether the construction is satisfactory or needs modification.
    • If a local public agency has been granted state-highway access permitting authority, that authority may be transferred from TxDOT under the conditions stated by TxDOT; the cited source does not establish that Knox County has received such a transfer.
    • Drainage impacts on the state highway system must be coordinated with and approved by TxDOT before any local approval.
    • Driveway geometrics, utility location or relocation, environmental requirements, wetlands considerations when applicable, federal and state laws, ADA Accessibility Guidelines, and Texas Accessibility Standards must also be considered.
    • A private residential driveway may not exceed 24 feet in width measured at right angles to the driveway centerline, except as increased by permissible radii; the radius connecting the driveway to highway pavement may not be less than 15 feet.
    • Driveway angle is generally 75 to 90 degrees; one-way 45 to 90 degree angle driveways are permitted for connections to one-way frontage roads or lane-divided highways.

    private residential driveway maximum width: <= 24 feet (Measured at right angles to the driveway centerline; may be increased by permissible radii.) · minimum driveway radius connecting to highway pavement: >= 15 feet · required TxDOT advance notification before construction: 24 hours (Notification is required after receipt of the fully executed permit and before right-of-way construction begins.)

    “No construction work on the driveway shall be undertaken on the right of way until a fully executed driveway permit has been received by the applicant and the applicant has given 24-hour notification to TxDOT.”
    One more reviewed finding on this topic
  • Permit feesPublished (with conditions)

    OSSF permit fees in areas where the TCEQ executive director, rather than a local authorized agent, administers the program; this is the state rule relevant when no local authorized agent exists.

    • The fee schedule is in Subchapter C for areas where no authorized agent exists.
    • The application fee is $200 for an OSSF serving a single-family dwelling or $400 for all other types of OSSFs.
    • A $10 fee is collected for each OSSF permit for the commission under Texas Health and Safety Code Chapter 367.
    • Fees are payable when the owner or owner's agent applies; payment is submitted to the appropriate regional office by money order or check payable to the Texas Commission on Environmental Quality.
    • The re-inspection fee equals one-half of the permit fee in effect when the original application was submitted to the regional office.
    • Application fees are nonrefundable.
    • The cited rule states adopted July 25, 2012 and effective August 16, 2012; the publication is revised May 2017.

    single-family OSSF application fee: 200 USD · other OSSF application fee: 400 USD · commission fee per OSSF permit: 10 USD (Collected under Texas Health and Safety Code, Chapter 367.) · re-inspection fee: one-half of the permit fee in effect at original application text

    “The application fee for an on-site sewage facility (OSSF) permit is: (1) $200 for an OSSF serving a single family dwelling; or (2) $400”
  • Permit processPublished (with conditions)

    On-site sewage facilities, including septic systems and holding tanks, in Texas, including property in Knox County where no more-stringent authorized local permitting program applies.

    • A permit is required to construct, install, alter, extend, or repair an OSSF.
    • Applicants must check with the local permitting authority; local permitting programs may be more stringent than state minimums.
    • The permitting authority must either approve or deny the planning materials and permit application within 30 days of receipt.
    • If denied, the permitting authority must provide a written explanation, and the decision may be appealed to the permitting authority's supervisory authority.
    • The 10-acre permitting exemption requires compliance with all other requirements, including planning, construction, and installation standards of 30 TAC 285; 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; effluent disposal on the property; and the single-family dwelling being 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 OSSFs may not need a permit if installed before an authorized local program 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 TCEQ regional office is the permitting authority where a local jurisdiction has not been authorized.

    minimum tract size for 10-acre exemption: >= 10 acres (Single-family dwelling and all other stated exemption conditions must also be met.) · minimum OSSF setback for 10-acre exemption: >= 100 feet from property line (All parts of the OSSF must meet the setback.) · emergency-repair reporting deadline: <= 72 hours after repairs have begun (Report must be made in writing to the permitting authority.) · permit application review deadline: <= 30 days after receipt (The permitting authority must approve or deny the planning materials and permit application.)

    “A permit is required to construct, install, alter, extend, or repair an OSSF. Always check with your local permitting authority. Local permitting programs can be more stringent than State minimums. [...] The TCEQ regional office will be the permitting authority in locations where a local jurisdiction has not been authorized. [...] The permitting authority must either approve or deny the planning materials and permit application within 30 days of receipt.”
    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 — Building inspections for construction in Knox County.
  • Certificate of occupancy — Certificates of occupancy or final certificates of compliance in unincorporated Knox County.
  • Local zoning — Zoning adopted or administered by municipalities or towns located in Knox County, including Benjamin, Knox City, and Munday.
  • Mandatory utility hookup — Required connection to public water or wastewater utilities for property in Knox County, Texas.
  • Agricultural exemption — Any agricultural-use exception to subdivision or platting requirements in Knox County, including unincorporated areas.
2 more unanswered
  • Building in a floodplain
  • Short-term rentals

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 Knox County, Texas

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

Knox County scores 51/100 on the Bolthole Index, a solid county profile. Its strengths: deep seclusion — about 2,097 people within 15 miles and low administrative friction for a quiet rural property. Watch-outs: workable self-sufficiency basics (25.3″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.

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

Knox 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 Texas Commission on Environmental Quality (TCEQ) regional office (permitting authority where no local authorized agent exists). 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 Knox County?

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

Land in Knox County runs about $1,983 per acre, based on the latest county data.

What is the water situation in Knox County?

Knox County gets about 25.3" of rain a year, with severe drought in roughly 39.3% of years.

How remote is Knox County?

A typical private-land location has about 2,097 people within 15 miles and 506,619 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Knox compares in Texas

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