Henderson County, TX Building Permits, Zoning & Septic

Unincorporated Henderson County, Texas has no general building-permit requirement, but if your project is in a designated floodplain area outside any city limits, you need a floodplain development permit before you build¹. The county has no zoning ordinance for unincorporated land, unlike the City of Athens inside it, which zones everything within its own limits²³. Septic systems go through Henderson County's own Septic Services department, which acts as the state's authorized local permitting agent⁴.

At a glance

Building permit: Not required in unincorporated Henderson County, except a floodplain development permit if your site is in a Special Flood Hazard Area¹⁵
Zoning: No county zoning in unincorporated areas; the City of Athens zones its own limits²³
Septic: County-administered OSSF permit through Henderson County Septic Services⁴
RV living: Up to three RVs on your own property fall outside the RV-park rules; 4 or more triggers subdivision platting⁶
Tiny home: Under 400 sq ft counts as a tiny home; only regulated if part of a 4-or-more-unit RV park⁷
New-building setback from public roads: 25 ft from most roads, 50 ft from major highways, outside incorporated cities⁸
Agricultural land-division exemption: Available for tracts used primarily for agriculture, farm, ranch, wildlife-management or timber production⁹

Who to call

Floodplain permits

Henderson County Development & Floodplain Administration Office

Floodplain development permits, plats, replats and general development review for land outside any Henderson County city limits

903-677-7242

100 E Tyler Street, Room 302, Athens, TX 75751

Online permits →

Septic permits

Henderson County Septic Services

On-Site Sewage Facility (OSSF/septic) permit applications for Henderson County as the TCEQ-authorized local agent

903-257-9057

Online permits →

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

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

Not generally, if your land is outside any city limits. Henderson County has no countywide building-permit requirement for ordinary construction in unincorporated areas¹. The one exception is location: if your project is development, including a new building or improvement, in a designated Special Flood Hazard Area outside a city, the county's floodplain assessment and permit apply before you can build⁵. Texas law gives some counties fire-code and residential-code authority over unincorporated construction, but only once a county's population passes 250,000 or it sits next to one that has, and Henderson County's own population of roughly 86,158 is well under that mark, so this authority would only reach the county through an adjacent large county, which is unconfirmed here¹⁰¹¹. Inside the City of Athens, construction is a different story: Athens has adopted the 2021 International Residential Code and 2021 International Building Code with amendments, and requires its own permits¹².

Who handles floodplain and septic permits in Henderson County?

The Henderson County Development & Floodplain Administration Office reviews plats, replats and general development outside any city limits, and is the office to contact for a floodplain development permit¹³. Its permit application requires compliance with the county's Floodplain Ordinance and all other applicable local, state and federal rules, and asks specifically whether your site is in a floodway and whether a No Rise Certification is attached¹⁴. Septic systems go through Henderson County Septic Services, the department that acts as the state's authorized local agent for On-Site Sewage Facility (OSSF) permits under state rules¹⁵. Neither office regulates zoning, because the county has none for unincorporated land².

Does Henderson County have zoning?

Not in unincorporated areas. Texas counties lack general zoning authority outside their cities, and unincorporated Henderson County land is not zoned²³. That means minimum dwelling size, minimum lot size, lot coverage, building height, zoning districts, accessory dwellings, manufactured-home occupancy and temporary camping have no county-level rule outside city limits³. The City of Athens, the county seat, is the opposite case: all property inside Athens city limits carries a specific zoning designation across the city's 17 zoning districts, each with its own allowed uses and development standards¹⁶. One rule does apply countywide regardless of zoning: a new building outside an incorporated city must sit at least 25 feet from the edge of the right-of-way of an ordinary public road, and at least 50 feet from a major highway⁸. Land used primarily for agriculture, farming, ranching, wildlife management or timber production is also exempt from the county's subdivision platting rules when it is divided, as long as the division does not lay out streets or other areas intended for public use⁹.

How do septic permits work in Henderson County?

Texas requires a permit and approved plan to construct, alter, repair, extend or operate an on-site sewage facility, and in Henderson County that permit is issued locally through Henderson County Septic Services rather than a state TCEQ regional office¹⁷. About 32.8% of the county's soils are rated free of severe limits for a conventional septic drain field, better odds than many rural Texas counties, but still meaning roughly two-thirds of parcels may need engineering or an alternative system¹⁸. A well-known statewide exception is the 10-acre rule: a single-family home on a tract of at least 10 acres can skip the OSSF permit if a TCEQ-licensed evaluator or engineer signs off, every part of the system stays at least 100 feet from the property line, the home is the only dwelling on the tract, and effluent stays on the property¹⁷. Emergency repairs are exempt from the permit itself but must be reported in writing to Septic Services within 72 hours after the repair begins¹⁷.

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

A single RV or tiny home for your own use is not treated the way a commercial RV park is. Henderson County's subdivision regulations define a recreational-vehicle park as land designed to accommodate four or more RVs used for dwelling or sleeping purposes, and specifically exempt a property owner accommodating no more than three recreational vehicles on the property at one time⁶. Cross that four-vehicle line, or set up a business renting RV sites, and the county treats the development as a subdivision requiring a compliant plat and infrastructure review before construction⁶. Tiny homes fall under the same framework: the county defines a tiny home as any residential structure under 400 square feet, whether on wheels or on a foundation, and that definition only triggers the RV-park rules once four or more units are grouped together⁷. Because the county has no zoning ordinance outside city limits, placing a single RV or tiny home as your own residence has no county-level restriction beyond that RV-park threshold³.

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

Confirm your parcel is outside all city limits; inside Athens, you will need a city permit and must follow Athens's own zoning and 2021 code editions instead of this county-level guide¹⁶¹².
Check whether any part of your site is in a Special Flood Hazard Area; if so, apply for a floodplain development permit through the Development & Floodplain Administration Office before construction starts¹³.
Since there is no general county building permit for ordinary construction outside a floodplain, you can move directly to septic and site planning once the floodplain question is settled¹.
Arrange your septic evaluation and permit application with Henderson County Septic Services; ask whether your tract of 10 or more acres could qualify for the state's 10-acre OSSF exemption¹⁵¹⁷.
If you are building near a public road, keep any new structure at least 25 feet from the road right-of-way, or 50 feet if it fronts a major highway⁸.
If your driveway connects to a state highway, submit TxDOT Form 1058 to the local TxDOT district office and wait for a fully executed permit before starting work in the right-of-way¹⁹.

What to check before you buy land in Henderson County

Septic and soils: with about 32.8% of the county's soils rated free of severe limits for a conventional drain field, get a site evaluation before you assume a standard system will work on a given parcel¹⁸. Flood: check whether the parcel sits in a Special Flood Hazard Area, since that triggers the county's floodplain development permit even though ordinary construction elsewhere in the county needs no permit at all⁵. Access: a driveway onto a state highway needs a TxDOT permit built to code, including up to a 24-foot width for a private residential driveway and at least a 15-foot radius where it meets the pavement²⁰. Drought: Henderson County has spent about 14.5% of recent years in severe drought, moderate by Texas standards²¹. Taxes: the effective property tax rate runs about 1%, with a median annual bill near $1,859²²²³. Subdividing: if you plan to divide the tract yourself, an agricultural-use exemption can avoid the county's subdivision platting rules, but only while the land stays primarily in agriculture, farming, ranching, wildlife management or timber production⁹.

Watch-outs

No official Henderson County source confirms or denies an owner-builder exemption from any permit or inspection; ask the Development & Floodplain Administration Office directly before assuming one applies¹³.
Well permits, general building inspections, and certificates of occupancy are unconfirmed for Henderson County in official sources reviewed for this guide; do not assume any of the three is required or waived without asking the Development & Floodplain Administration Office directly¹³.
Zoning, code adoption, and permit requirements inside the City of Athens are entirely separate from this unincorporated-county guide; confirm with Athens directly if your parcel is inside city limits¹⁶.

Sources

Written September 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

How Henderson County scores

Seclusion31100% ev.

Self-Sufficiency67100% ev.

Admin Boringness7290% ev.

Durability55100% ev.

Property Autonomy71100% ev.

Carry Cost72100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$273kTypical home

1%Property tax

$4,699Land / acre

44.1"Annual rain

14.5% of yrsSevere drought

35.4 / yr (+23.4)Mid-century 100°F days

22.8 daysMid-century dry spell

2.44" (+4.4%)Mid-century 1-day rain

1.4×Wildfire change factor

100%Forward climate coverage

$2,318Home insurance / yr

1.3% / yrInsurance growth

0%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

81,692People within 30 min

7,070,640People within 2 hr

47,858Radius comparison (15 mi)

98.6People / sq mi

0%Federal land

97.5%Land at 15% slope or less

32.8%Septic soil without severe limits

167,268 acWorkable land screen

38%Wooded land

31.3 tonsBiomass / forest ac

65.7°FAvg temp

Answers from the rulebook for Henderson County

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

Henderson County rules

Building permitLimited
Development, including new buildings and improvements, in designated floodplain areas outside Henderson County city limits.
- The requirement is limited to development in a designated floodplain area.
- The county source states that Henderson County floodplain administration applies in areas outside any city limits.
- The application must comply with the Henderson County Floodplain Ordinance and all other applicable local, state, and federal regulations.
- The form includes additional questions and documentation for Special Flood Hazard Areas, floodways, substantial improvements, floodproofing, and subdivisions or other development containing 50 lots or 5 acres.
“The undersigned hereby makes application for a permit to develop in a designated floodplain area. The work to be performed is described below and in attachments hereto.”
Development & Floodplain Administration Office ↗Re-checked Sep 11, 2026
Zoning districts · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum dwelling size · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum lot size · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
SetbacksSpecified
New buildings and subdivision building set-back lines from public roads in areas outside incorporated cities in Henderson County.
- The rule applies to new buildings or locations near public roads.
- The minimum is 25 feet from the edge of the right-of-way for public roads other than major highways and roads.
- The minimum is 50 feet from the edge of the right-of-way for major highways and roads.
- Any state or federal highway is deemed a major highway on the date of adoption.
- The Commissioners Court may designate additional public roads as major highways and must give public notice before such designation.
setback from edge of right-of-way: >= 25 feet (Public roads other than major highways and roads) · setback from edge of right-of-way: >= 50 feet (Major highways and roads)
“prohibits the construction or location of a new building any closer than 25 feet [...] and no closer than 50 feet”
Henderson County Subdivision Regulations (2024) ↗Re-checked Sep 11, 2026
Lot coverage · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Building height · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Living in an RVLimited
Recreational-vehicle occupancy in privately owned recreational vehicle parks in unincorporated Henderson County; the regulations define such a park as land designed to accommodate four or more recreational vehicles for dwelling or sleeping purposes for any length of time.
- A recreational vehicle park existing before adoption of the regulations is exempt unless expanded or its operations or intended purpose are altered.
- Any recreational park developed after the effective date of the regulation is a subdivision subject to the regulations.
- A developer must prepare a compliant plat.
- The regulations do not apply to a property owner accommodating no more than three recreational vehicles on the property at one time.
- Before construction begins, the owner/developer must consult the Development Office having jurisdiction over the site.
- Recreational vehicle parks must meet applicable infrastructure, water, sewerage, road, spacing, fire-safety, sanitation, nuisance, and other applicable requirements in the regulations.
- Subdivisions within a municipality's extraterritorial jurisdiction may also be subject to municipal subdivision regulations or interlocal agreements.
recreational vehicles defining a recreational vehicle park: >= 4 vehicles or more (Seasonal hunting camps that are temporary are excluded from the recreational vehicle park definition.) · maximum recreational vehicle spaces per acre: <= 14 spaces per acre
“occupied or intended to be occupied for dwelling or sleeping purposes for any length of time.”
Henderson County Subdivision Regulations (2024) ↗Re-checked Sep 11, 2026
Camping on your land · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Tiny homesLimited
Tiny homes under 400 square feet located in a Henderson County recreational vehicle park governed by Chapter 5 of the county subdivision regulations.
- The regulations define a tiny home as any residential structure under 400 square feet, whether on wheels or secured to a foundation.
- The recreational vehicle park rules apply to land designed to accommodate four or more recreational vehicles for dwelling or sleeping purposes.
- A park developer must prepare a compliant plat, satisfy infrastructure and sewerage requirements, and consult the Development Office before construction.
- The regulations do not apply to a property owner accommodating no more than three recreational vehicles at one time.
- Temporary seasonal hunting camps are excluded from the recreational vehicle park definition.
tiny-home floor area: < 400 square feet (The definition applies whether the structure is on wheels or secured to a foundation.) · recreational vehicles defining a recreational vehicle park: >= 4 vehicles or more (Seasonal hunting camps that are temporary are excluded.)
“Tiny Home – Any residential structure under 400 square feet”
Henderson County Subdivision Regulations (2024) ↗Re-checked Sep 11, 2026
Manufactured homes · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Accessory dwellings · by state lawNo county rule
Unincorporated Henderson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Henderson County has no zoning ordinance. The county legal census found no county zoning ordinance, citing henderson-county.com.
- 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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Agricultural exemptionAvailable (with conditions)
Division of land into agricultural tracts under Henderson County subdivision regulations outside incorporated cities.
- The owner must not lay out streets, alleys, squares, parks, or other parts intended for public use.
- The land must be used primarily for agricultural use as defined by Section 1-d, Article VIII, Texas Constitution, or for farm, ranch, wildlife-management, or timber-production use under Section 1-d-1, Article VIII, Texas Constitution.
- If the tract ceases to be used primarily for the qualifying agricultural, farm, ranch, wildlife-management, or timber-production use, the exemption is revoked and the subdivision regulations apply.
- The County Clerk will notify the Commissioners Court of a deed filed contrary to the regulation, and the parties must comply with the regulations.
“a division of a tract of land into agricultural tracts is exempt if: [...] The land is to be used primarily for agricultural use”
Henderson County Subdivision Regulations (2024) ↗Re-checked Sep 11, 2026
Building in a floodplainRequired
Development planned in the Special Flood Hazard Area outside any city limits in Henderson County.
- The Henderson County Development Office administers floodplain matters outside any city limits.
- Floodplain assessment is voluntary for other listed developments but required when development is planned in the Special Flood Hazard Area.
- The permit application requires compliance with the County of Henderson Floodplain Ordinance and all other applicable local, State, and Federal regulations.
- The application asks whether the development is in a floodway and, if so, whether a No Rise Certification is attached.
“The floodplain assessment is required if development is planned in the Special Flood Hazard Area.”
Development & Floodplain Administration Office ↗Re-checked Sep 11, 2026
Permit processPublished (with conditions)
On-site sewage facility permit applications administered through Henderson County Septic Services.
- The county page publishes an On-Site Sewage Facilities Permit Application PDF.
- Applicability and technical requirements may depend on the OSSF type and applicable Texas Commission on Environmental Quality rules.
“On-Site Sewage Facilities Permit Application (PDF)”
Septic Services ↗Re-checked Sep 11, 2026
County-wide zoningAbsent
Texas counties lack general zoning authority in unincorporated areas; land use in unincorporated Henderson County is not zoned.
Henderson County - County Ordinances ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

Building code adoptedPartial
Industrialized housing and buildings, modules, and modular components governed by the Texas Industrialized Housing and Buildings program.
- The mandatory state code adoption applies to industrialized housing and buildings, modules, and modular components, not all construction statewide.
- The effective date is July 1, 2024.
- The International Existing Building Code applies to alterations of portable industrialized buildings.
- Manufacturers already certified for Texas must have design-package documents reviewed and approved to the new editions with an approval date on or after July 1, 2024, unless the manufacturer elected to transition before the effective date under Department rule 70.70(a)(5)(B).
- Construction begun on or after July 1, 2024 must comply with the new code editions and approved design packages.
- Construction begun before July 1, 2024, or before a manufacturer's effective transition date, must meet the stated completion, inspection, and labeling deadline to remain eligible for a Texas decal.
effective date: 2024-07-01 · International Building Code: 2021 Edition (including appendices C, F, and K) · International Residential Code: 2021 Edition (including appendices AG, AH, AK, AP, AQ, and AT) · International Fuel Gas Code: 2021 Edition · International Mechanical Code: 2021 Edition · International Plumbing Code: 2021 Edition · International Energy Conservation Code: 2015 Edition · National Electrical Code: 2020 Edition · International Existing Building Code: 2021 Edition (for alterations of portable industrialized buildings)
“July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
Industrialized Housing and Buildings – Adoption of New Code Editions ↗Re-checked Sep 12, 2026
Who permits septicMixed
On-site sewage facilities, including septic systems, throughout Texas
- In most areas, local governments act as TCEQ-authorized agents and administer the OSSF program.
- The TCEQ regional office is the permitting authority where a local jurisdiction has not been authorized.
- Local permitting programs may be more stringent than state minimums.
“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.”
Getting a Permit for an OSSF - Such as a Septic System ↗Re-checked Sep 12, 2026
Septic permitLimited
Construction, installation, alteration, extension, repair, and operation of OSSFs, including septic systems, in Henderson County under Texas statewide minimum rules.
- A permit and approved plan are required for construction, alteration, repair, extension, and operation unless an exception applies.
- The 10-acre exemption requires a TCEQ-licensed site evaluation or professional-engineer evaluation; 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 must be the only dwelling on the tract.
- Emergency repairs listed by TCEQ do not require a permit but must be reported in writing to the permitting authority within 72 hours after repairs begin.
- Grandfathered systems may also be exempt if installed before the local authorized program or before September 1, 1989, whichever is earlier, and if they are not a nuisance, do not need repair, and have not had a significant increase in use or been altered.
- Local permitting programs may be more stringent than state minimums; applications are submitted to the local permitting authority where one is authorized.
minimum tract size for 10-acre exemption: >= 10 acres · minimum OSSF setback for 10-acre exemption: >= 100 feet from property line · emergency-repair reporting deadline: <= 72 hours after repairs begin
“A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
Getting a Permit for an OSSF - Such as a Septic System ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- 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”:”
  Getting a Permit for an OSSF - Such as a Septic System ↗Re-checked Sep 12, 2026
Septic inspectionLimited
OSSF installation and, where applicable, maintenance inspections in Texas
- Authorized agents or their designated representatives inspect system installation.
- Some permitting authorities impose more stringent requirements.
- Maintenance-provider inspection and reporting requirements apply to systems and circumstances governed by 30 TAC §285.91(4).
- Electronic monitoring may reduce reporting to every six months where the stated monitoring conditions apply.
reduced maintenance reporting interval with qualifying electronic monitoring: 6 months (only where the system uses the specified electronic monitoring, automatic notification, and disinfection monitoring)
“Many times, the AA has a "designated representative" (DR) to assist them with their responsibilities, which include reviewing plans for constructing, altering, extending or repairing each OSSF; issuing permits; and inspecting system installation. [...] If the system uses an electronic monitor, automatic radio or telephone to notify the maintenance provider of system or component failure and to monitor the amount of disinfection in the system, reporting may be reduced to every six months.”
Basics for Septic Systems ↗Re-checked Sep 12, 2026
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”
Section 4: Driveway Permits, Design, and Materials ↗Re-checked Sep 12, 2026
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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
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.”
Local Government Code Chapter 233, County Regulation of Housing and Other Structures ↗Re-checked Sep 21, 2026

Inside cities and towns in Henderson County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

Building code adoptedAdopted (with conditions)
Building-code adoption by the City of Athens, Texas, within its municipal jurisdiction.
- The official Athens adopted-ordinances archive lists separate 2024 ordinances adopting the 2021 IRC, 2021 IBC, 2021 IPC, and other model codes.
- This claim is limited to the City of Athens and does not establish countywide adoption in Henderson County.
International Residential Code edition: 2021 IRC · International Building Code edition: 2021 IBC · International Plumbing Code edition: 2021 IPC
“AN ORDINANCE AMENDING CHAPTER 5, ARTICLE III OF THE CODE ORDINANCES OF THE CITY OF ATHENS, TEXAS, BY ADOPTING THE 2021 INTERNATIONAL RESIDENTIAL CODE WITH AMENDMENTS, PROVIDING A REPEALER CLAUSE, A SEVERABILITY CLAUSE, AND AN EFFECTIVE DATE.”
Archive Center • 2024 Ordinances - Adopted ↗Re-checked Sep 11, 2026
Local zoningPresent (with conditions)
Property within the city limits of Athens, Texas, in Henderson County.
- The City of Athens states that all property within the city limits has a specific zoning designation.
- The city has 17 zoning districts with district-specific allowable uses, spatial regulations, and development standards.
- Variance requests are heard by the Zoning Board of Adjustment.
“All property within the city limits has a specific zoning designation. The City of Athens has 17 zoning districts, each with a unique set of allowable uses, spatial regulations, and development standards. These zoning districts are codified in the Athens Zoning Ordinance.”
Planning & Zoning ↗Re-checked Sep 11, 2026

Still unanswered

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

Owner-builder exemption — Owner-builders seeking an exemption from building permits, inspections, or related construction requirements in Henderson County, Texas.
Inspections — Building inspections in Henderson County, Texas.
Certificate of occupancy — Certificates of occupancy in Henderson County, Texas.
Well permit — Private groundwater wells in Henderson County.
Short-term rentals — Short-term rental use in Henderson County, including unincorporated areas.

1 more unanswered

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 Henderson County, Texas

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

Henderson County scores 65/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: about 81,692 people within a 30-minute drive.

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

Henderson County requires a building permit only in limited cases (such as floodplains or specific zones), and it has no county-wide zoning. Onsite septic is permitted by Henderson County Septic Services (OSSF authorized agent). 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.

How much does land cost in Henderson County, Texas?

Land in Henderson County runs about $4,699 per acre, based on the latest county data.

What is the water situation in Henderson County?

Henderson County gets about 44.1" of rain a year, with severe drought in roughly 14.5% of years.

How remote is Henderson County?

A representative private-land location has about 81,692 people within a 30-minute drive and 7,070,640 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

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

At a glance

Who to call

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

Who handles floodplain and septic permits in Henderson County?

Does Henderson County have zoning?

How do septic permits work in Henderson County?

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

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

What to check before you buy land in Henderson County

Watch-outs

Sources

Henderson County in Texas

How Henderson County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Henderson County

Henderson County rules

Texas rules that apply here

Inside cities and towns in Henderson County

Still unanswered

Living off-grid in Henderson County, Texas

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

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

How much does land cost in Henderson County, Texas?

What is the water situation in Henderson County?

How remote is Henderson County?

How Henderson compares in Texas