Limestone County, TX Building Permits, Zoning & Septic Rules

Unincorporated Limestone County, Texas appears not to require a residential building permit, although the county does not publish an express answer for ordinary homes¹. Limestone County has no zoning ordinance for unincorporated land². Septic is different: the county administers OSSF permits and publishes the application process³⁴.

At a glance

Building permit: Appears not required for an ordinary home in unincorporated Limestone County¹
Zoning: No county zoning ordinance; the City of Mexia has municipal zoning²⁵
Septic permits: Limestone County OSSF office (TCEQ authorized agent)³⁴
OSSF permit fee: $310 for a single-family system; $510 for all other systems, including commercial and multi-family⁴
RV living: Unrestricted in unincorporated Limestone County⁶
Residential subdivision (5 acres or less): Regulated; preliminary plat $200 + $10/lot, final plat $100 + $5/lot⁷
Owner-builder exemption: Not published; no county building-permit program exists to exempt from⁸

Who to call

Septic permits

Limestone County OSSF / Environmental Office

OSSF (septic) permitting as TCEQ's authorized agent for Limestone County: application intake, soil and site evaluation review, plan approval, inspection scheduling and notice of approval

200 West State Street, Suite 101, Groesbeck, TX 76642

Online permits →

Floodplain permits

Limestone County Floodplain Administrator

Reviews construction, including every OSSF application, for compliance with local and federal floodplain regulations in Limestone County

(254) 729-5517

1221 E Yeagua St, Groesbeck, TX 76642

Also useful

Limestone County Judge's Office

General county administration and the Commissioners Court; the practical point of contact since Limestone County has no building or zoning department for unincorporated land

(254) 729-3810

200 W State St, Groesbeck, TX 76642

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

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

Unincorporated Limestone County appears not to require a residential building permit for an ordinary home, but the county does not publish an express yes-or-no statement for homes¹. Texas county fire-code permit authority applies only in qualifying counties and covers commercial buildings, public buildings and multifamily dwellings with four or more units—not an ordinary single-family house⁹. Limestone County separately regulates septic systems and residential subdivisions that create two or more parts of five acres or less³⁷. Inside the City of Mexia, municipal rules apply: Mexia has adopted building codes for construction in its jurisdiction¹⁰. Ask the County Judge's Office to confirm whether floodplain review or another project-specific county approval applies to your parcel¹¹.

Who handles county business in Limestone County, and how do you reach them?

Limestone County does not list a general building department on its official site, so the County Judge's Office at the courthouse in Groesbeck is the practical first call for an unincorporated parcel¹¹. Ask that office to confirm whether an ordinary home needs any project-specific county review and whether a certificate of occupancy or building inspection applies. Septic applications, site evaluations and installation inspections go through Limestone County's OSSF/Environmental office³⁴. Every OSSF application also needs an approved floodplain determination, and the Floodplain Administrator examines construction for compliance with local and federal floodplain regulations⁴¹². The Floodplain Administrator's official page gives the office address and phone number and says a floodplain permit is required when property lies in the floodplain¹².

Does Limestone County have zoning?

Limestone County has no zoning ordinance covering unincorporated land². For unincorporated property, the county therefore sets no zoning-based minimum dwelling size, minimum lot size, setback, lot-coverage limit or building-height limit⁶. Deed restrictions, subdivision plats, floodplain rules and septic requirements can still constrain a particular tract. The answer changes inside the City of Mexia: every lot within the city limits is zoned, and city construction is governed by municipal building codes⁵¹⁰. Before relying on the unincorporated rules, confirm the parcel's city-limit status and read its deed restrictions and recorded plat.

How do septic permits work in Limestone County?

Limestone County is TCEQ's own authorized agent for OSSF permitting, so the county's OSSF office, not the state, reviews and approves septic applications³⁴. The permit fee is $310 for a single-family residential system and $510 for any other system, including commercial and multi-family installations⁴. Every OSSF must also have an approved floodplain determination, which you can file and pay for ($25) either before or alongside your septic application, and an aerobic system additionally needs an affidavit recorded with the County Clerk before the application is filed⁴¹². Soil conditions make this worth planning for early: only about 15% of Limestone County's land is free of severe limitations for a conventional septic drain field, so budget for a soil evaluation by a registered sanitarian, professional engineer or licensed installer, and expect many parcels to need an aerobic treatment unit rather than a standard trench field¹³. Texas's statewide 10-acre exemption can still apply to a qualifying single-family tract, but the county's own permit and inspection process, including a required pre-cover inspection you must schedule with the county's office, otherwise controls¹⁴⁴.

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

In unincorporated Limestone County, county zoning does not restrict occupying an RV, tiny home or manufactured home on your own property⁶. That answer is limited to county zoning: deed restrictions, subdivision rules, septic requirements and floodplain rules may still affect a specific tract. Inside the City of Mexia, municipal zoning and building codes apply instead⁵¹⁰. A tiny home built as industrialized housing must also comply with the Texas codes governing industrialized modules and components¹⁵. Plan wastewater before moving onto the land, because construction, installation, alteration, extension or repair of an OSSF generally requires a permit and approved plan¹⁴.

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

Confirm whether the parcel is outside the City of Mexia; city zoning and building codes apply inside the city limits⁵¹⁰.
Ask the County Judge's Office whether floodplain review or another project-specific approval applies; an ordinary home in unincorporated Limestone County appears not to need a general residential building permit¹¹¹.
Start septic planning with a site and soil evaluation, then submit the OSSF application and planning materials to the county⁴.
Submit the floodplain application before or with the septic application because every OSSF needs an approved floodplain determination⁴.
If the project creates two or more residential parcels of five acres or less, submit the required plats and fees through the County Engineer's office⁷.
If access connects to a state highway, submit Form 1058 to TxDOT and wait for the executed driveway permit before building in the right of way¹⁶.
Arrange the required septic installation inspection before the system is covered⁴.

What to check before you buy land in Limestone County

Only about 15% of Limestone County's soils are rated without severe limitations for a conventional septic drain field, so make the site evaluation an early contingency in the purchase contract¹³. Limestone County averages about 40 inches of precipitation a year and has experienced severe drought in about 18% of years, but those countywide figures do not establish a particular well's yield¹⁷¹⁸. Nearly all county land is at a slope of 15% or less, while roughly 23% is wooded¹⁹²⁰. Limestone County has about 25 people per square mile, and the nearest city of 100,000 or more is about 40 miles from the county center²¹²². Check the survey, legal access, deed restrictions, recorded plat, flood map and utility availability before closing. A driveway connecting to a state highway requires TxDOT's access-permit process²³. We could not confirm a countywide private-well permit rule, so ask a licensed driller which groundwater district, if any, covers the parcel.

Watch-outs

Limestone County does not publish an express answer on ordinary residential building permits, inspections or certificates of occupancy; confirm your project with the County Judge's Office¹¹¹.
Whether a specific well on your land needs a permit depends on whether it falls inside a groundwater conservation district; no official source found in this research established a countywide Limestone County well-permit rule, so check with a local driller or with the County Judge's Office before you plan around either answer¹¹.
The county's scanned OSSF instructions do not provide a reliably readable office phone number, so use the published office address or ask the County Judge's Office for the current septic contact⁴¹¹.

Sources

Written September 28, 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 Limestone County scores

Seclusion59100% ev.

Self-Sufficiency48100% ev.

Admin Boringness8490% ev.

Durability44100% ev.

Property Autonomy71100% ev.

Carry Cost81100% 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 →

$179kTypical home

1.2%Property tax

$2,658Land / acre

40.4"Annual rain

18.1% of yrsSevere drought

40.5 / yr (+27.7)Mid-century 100°F days

21.9 daysMid-century dry spell

2.18" (+6.2%)Mid-century 1-day rain

1.39×Wildfire change factor

100%Forward climate coverage

$1,987Home insurance / yr

0.4% / yrInsurance growth

0%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

12,368People within 30 min

5,005,737People within 2 hr

16,235Radius comparison (15 mi)

24.6People / sq mi

0%Federal land

99.8%Land at 15% slope or less

14.8%Septic soil without severe limits

84,053 acWorkable land screen

22.5%Wooded land

17.3 tonsBiomass / forest ac

66.5°FAvg temp

Answers from the rulebook for Limestone County

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

Limestone County rules

Zoning districts · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum dwelling size · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum lot size · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Setbacks · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Lot coverage · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Building height · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Living in an RV · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Camping on your land · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Tiny homes · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Manufactured homes · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Accessory dwellings · by state lawNo county rule
Unincorporated Limestone County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Limestone County has no zoning ordinance. The county legal census found no county zoning ordinance, citing bexar.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Subdividing landRegulated (with conditions)
Subdivisions in Limestone County that create two or more parts of five acres or less intended for residential purposes.
- The regulations apply only to a subdivision which creates two or more parts of five acres or less intended for residential purposes.
- Lots of five acres or less are presumed to be for residential purposes unless the land is restricted to nonresidential uses on the final plat and in all deeds and contracts for deeds.
- The order was adopted on December 27, 2010 and states that the rules became effective on December 27, 2010.
- The published fee schedule states: Preliminary Plat $200.00 plus $10.00 per lot; Final Plat $100.00 plus $5.00 per lot.
- The application fee is paid to the County Engineer’s office when the preliminary or final plat is submitted.
residential subdivision applicability threshold: <= 5 acres (Applies when the subdivision creates two or more parts intended for residential purposes.) · preliminary plat application fee: 200 USD (Plus $10.00 per lot.) · final plat application fee: 100 USD (Plus $5.00 per lot.)
“Notwithstanding any provision to the contrary, these rules apply only to a subdivision which creates two or more parts of five acres or less intended for residential purposes. Lots of five acres or less are presumed to be for residential purposes unless the land is restricted to nonresidential uses on the final plat and in all deeds and contracts for deeds.”
Order of the Limestone County Commissioners Court Establishing Subdivision Regulations and Plat Requirements ↗Re-checked Sep 11, 2026
Building permitNot required
Under Texas law counties generally lack authority to require residential building permits or inspections in unincorporated areas; Limestone County publishes no residential building-permit program (only OSSF/septic permitting).
Texas county building-permit authority (Local Gov't Code Ch. 233; Bexar County FAQ) ↗Scouted from the county site, not yet independently re-checked
County-wide zoningAbsent
Texas counties have no zoning authority in unincorporated areas.
Texas county land-use authority (Bexar County FAQ) ↗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 permitRequired
Construction, installation, alteration, extension, or repair of an OSSF in Texas
- A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.
- A 10-acre exemption may apply only if all listed conditions are met: site evaluation by a TCEQ-licensed site evaluator or professional engineer; single-family dwelling on at least 10 acres; no nuisance or groundwater pollution; all OSSF parts at least 100 feet from the property line; effluent disposed of on the property; and the single-family dwelling is the only dwelling on the tract.
- Emergency repairs listed by TCEQ do not require a permit but must be reported in writing to the permitting authority within 72 hours after repairs begin.
- Grandfathered systems may also be exempt if the stated conditions are met.
minimum tract size for 10-acre exemption: >= 10 acres (single-family dwelling and all other TCEQ conditions must be met) · minimum OSSF distance from property line for 10-acre exemption: >= 100 feet (all parts of the OSSF) · emergency repair reporting deadline: <= 72 hours (after repairs have begun; written report to permitting authority)
“A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
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
Permit processPublished (with conditions)
Constructing a new driveway or revising an existing driveway on the right of way of a Texas state highway.
- The applicant should contact the local District TxDOT office.
- The applicant must submit Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way.
- 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 construction may begin on the right of way until a fully executed driveway permit is received and the applicant gives TxDOT 24-hour notification.
- The driveway must comply with the executed permit and applicable regulations; TxDOT inspection must find construction satisfactory.
- Where a local public agency has permitting authority, drainage impacts on the state highway system still require TxDOT approval before local approval.
- Driveway geometrics, utilities, environmental requirements, wetlands considerations, ADAAG, TAS, and other applicable state and federal laws must be considered.
required form: Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way · advance notification: 24 hours (Notification to TxDOT is required before construction on the right of way.) · private residential driveway maximum width: <= 24 feet (Except as increased by permissible radii.) · minimum driveway radius to highway pavement: >= 15 feet
“The applicant shall complete and submit to TxDOT a Form 1058”
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 Limestone County

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

Building code adoptedAdopted (with conditions)
Construction regulated by the City of Mexia within its municipal jurisdiction.
- All listed current codes are stated by the City of Mexia to be effective as of July 21, 2025.
- The City exempts Section R309, automatic fire sprinkler systems, of the International Residential Code.
International Residential Code: 2024 edition (Section R309 automatic fire sprinkler systems is exempted.) · International Building Code: 2024 edition · NFPA 70 National Electrical Code: 2023 edition
“Note: All current codes are effective as of July 21, 2025. (1) International Residential Code, 2024 edition. (2) International Building Code, 2024 edition.”
Adopted Building Codes | Mexia, TX ↗Re-checked Sep 11, 2026
Local zoningPresent (with conditions)
Property within the city limits of Mexia, Limestone County, Texas.
- The ordinance applies within the City of Mexia city limits.
- Zoning classifications, permitted uses, variances, and other requirements are governed by the City of Mexia zoning ordinance and zoning map.
“Each and every lot, tract or property within the city limits of the City of Mexia, Limestone County, Texas, shall be zoned”
Zoning | Mexia, TX ↗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-builder exemptions from residential construction permitting or inspection requirements in unincorporated Limestone County.
Inspections — Residential building inspections in unincorporated Limestone County.
Certificate of occupancy — Certificates of occupancy for residential buildings in unincorporated Limestone County.
Well permit — Private water-well drilling and permitting in Limestone County, Texas.
Short-term rentals — Short-term rental use in Limestone County, Texas.

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 Limestone County, Texas

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

Limestone County scores 70/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost.

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

Limestone 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 Limestone County OSSF / Environmental Department (TCEQ 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.

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

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

Land in Limestone County runs about $2,658 per acre, based on the latest county data.

What is the water situation in Limestone County?

Limestone County gets about 40.4" of rain a year, with severe drought in roughly 18.1% of years.

How remote is Limestone County?

A representative private-land location has about 12,368 people within a 30-minute drive and 5,005,737 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 Limestone County, Texas

At a glance

Who to call

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

Who handles county business in Limestone County, and how do you reach them?

Does Limestone County have zoning?

How do septic permits work in Limestone County?

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

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

What to check before you buy land in Limestone County

Watch-outs

Sources

Limestone County in Texas

How Limestone County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Limestone County

Limestone County rules

Texas rules that apply here

Inside cities and towns in Limestone County

Still unanswered

Living off-grid in Limestone County, Texas

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

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

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

How much does land cost in Limestone County, Texas?

What is the water situation in Limestone County?

How remote is Limestone County?

How Limestone compares in Texas