Unincorporated Comanche County, Texas does not require a general county building permit and does not have county zoning12. County plat rules apply outside incorporated cities and their ETJs, while city zoning can apply where municipal jurisdiction exists34. Comanche County handles septic permits countywide, including addresses inside cities5.
At a glance
- Building permit
- Not required in unincorporated areas; the county has no building department1
- Zoning
- No county zoning on unincorporated land; city zoning applies where municipal jurisdiction exists24
- Septic
- Comanche County handles OSSF permits countywide; submit the application and plans before construction5
- Owner-installed septic
- Allowed for a single-family home you own and live on, if the local permitting authority allows it67
- Subdivision
- Dividing land outside cities and their ETJs generally requires a county plat unless an exemption applies38
- RV / tiny home
- No county zoning rule on unincorporated land, but sanitation and city or ETJ rules can still apply91011
- Floodplain
- Habitable structures are barred from the flood plan in county-regulated subdivisions12
- Water wells (Middle Trinity area)
- Must be registered with the Middle Trinity Groundwater Conservation District before drilling13
Who to call
Also useful
Comanche County Commissioners Court
Approves preliminary subdivision plats and written approval for driveway drain-pipe installations in county-regulated subdivisions in unincorporated Comanche County; presided over by the County Judge
101 W Central Avenue, Comanche, TX 76442
Also useful
Files subdivision plats and collects subdivision filing fees for unincorporated Comanche County
Septic permits
Comanche County Judge's Office (OSSF Authorized Agent)
TCEQ's designated OSSF (septic) permitting authority for the entire county; the permit program is administered through the County Judge's Office
204 E Oak Ave, Comanche, TX 76442
Contact details are copied from each office’s official page and were checked against it on October 9, 2026.
Off-grid gear
Going off-grid in Comanche County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Comanche County, Texas?
Unincorporated Comanche County does not require a general county building permit, although the county's adoption of residential building-code standards could not be confirmed1. Separate approvals still matter: dividing land outside incorporated cities and their ETJs generally requires a county subdivision plat, septic construction generally requires a county OSSF permit, and driveway drain pipes in county-regulated subdivisions need written county approval31415. Inside a city or its ETJ, ask that city whether a building permit or zoning approval applies; Comanche County still handles septic permits countywide45. A qualifying agricultural, ranch, wildlife-management or timber division may be exempt from platting, but the exemption ends when the qualifying use ends8. A manufactured home cannot be occupied anywhere in Texas until it is installed16.
Who issues building permits and subdivision approvals in Comanche County?
Comanche County has no county building department or county zoning department to call12. For land outside an incorporated city and its ETJ, the Commissioners Court administers county subdivision plats and the County Clerk files them; preliminary-plat approval must come before subdivision construction317. Published filing fees are $1,000 for a final plat with roads and 10 lots or fewer, plus $50 per additional lot; a plat revision is $300 and cancellation is $20018. Reach the Commissioners Court at 101 W Central Avenue, Comanche, TX 76442, (325) 356-2466, and the County Clerk at (325) 356-26551920. Inside municipal jurisdiction, ask the city about its building permit and zoning approval; the Comanche County Judge's Office remains the countywide contact for septic permits4521.
Does Comanche County have zoning?
Comanche County does not have county zoning on unincorporated land2. The county therefore does not impose zoning-based setbacks, building-height limits, minimum dwelling sizes or RV and tiny-home restrictions there9. Local authority changes at municipal boundaries: city zoning applies where municipal jurisdiction exists, while county subdivision rules apply outside incorporated cities and their ETJs4. Those county plat rules can still shape a rural project without being zoning. Subdivision lots using individual septic systems must contain at least 43,560 square feet with community water or 87,120 square feet without it, subject to state requirements and proof that an acceptable system can be installed22. A qualifying agricultural division may avoid county platting, but that exemption does not waive septic, floodplain or other applicable development rules8. Comanche County handles the septic permit throughout the county even where city zoning applies5.
How do septic permits work in Comanche County?
Comanche County handles OSSF permits throughout the county, including for property inside cities5. A completed application and technical information must reach the county before septic construction, and changes to approved plans need the Comanche County inspector's prior approval5. The installer or owner must contact the inspector 5 working days before completion to schedule the facility inspection; construction authorization lasts 1 year, after which a new application and fee are required if no final inspection occurred5. The state exemption for a single-family home on at least 10 acres has site-evaluation, use, disposal, pollution and 100-foot setback conditions14. Only 13.8% of county soils lack severe limits for a conventional drain field, so evaluate the site early23. Owner installation is possible only if the local authority allows it and all stated conditions are met7. Contact the County Judge's Office for the application and inspection process21.
Can you live in an RV or tiny home on your land in Comanche County?
Unincorporated Comanche County has no county zoning restriction on RV or tiny-home occupancy9. That does not make an off-grid setup approval-free: a septic system or holding tank generally needs an approved plan and county OSSF permit, subject to narrow state exemptions10145. A manufactured home cannot be occupied anywhere in Texas until it is installed16. County subdivision rules also bar habitable structures in the flood plan for covered subdivision development12. Inside municipal jurisdiction, city zoning may change the answer; Comanche County still handles the septic permit for those addresses45. Comanche County's short-term-rental and certificate-of-occupancy requirements could not be confirmed; ask the Commissioners Court before committing to that use19.
Building a home in Comanche County: the steps, in order
- Confirm whether the parcel is outside an incorporated city and its ETJ; unincorporated Comanche County has no county zoning or general county building permit, while municipal building permits or zoning approval may apply elsewhere214.
- If the project divides land outside a city and its ETJ, ask the Commissioners Court whether a county plat exemption applies, then file any required plat with the County Clerk and obtain preliminary-plat approval before construction381920.
- If you plan a well, confirm whether the parcel is in the Middle Trinity Groundwater Conservation District, where wells must be registered before drilling13.
- Contact the County Judge's Office for the countywide OSSF application and septic permit before choosing the house site521.
- Order the septic site evaluation early because only 13.8% of county soils lack severe limits for a conventional drain field23.
- Get written approval from the County Precinct Commissioner before installing a driveway drain pipe in a county-regulated subdivision1519.
- For state-highway access, submit Form 1058 to TxDOT and give 24 hours' notice before right-of-way construction24.
What to check before you buy land in Comanche County
Budget for a harder septic system than the county average suggests: fewer than 14% of Comanche County's soils carry no severe limitation for a conventional drain field, so an aerobic or alternative system is a realistic outcome on much of the county's land23. The county sits in a region that spends roughly 31% of years in severe drought and gets under 32 inches of rain annually, so confirm a well or rural water access before you commit2526. If a well is part of the plan, check whether the parcel falls inside the Middle Trinity Groundwater Conservation District, where every well, new or existing, must be registered before it is drilled, equipped or altered13. Almost all of the county's land sits at 15% slope or less, which is favorable for building and septic siting on most parcels, but a site-specific soil test still decides your system type27. Comanche County's effective property tax rate runs about 1.5%, with a median annual bill near $2,0822829.
Watch-outs
- Whether Comanche County requires a building inspection or a certificate of occupancy, or regulates short-term rentals outside city limits, was not confirmed on an official county page; ask the Commissioners Court before you plan around an assumption19.
Sources
- Comanche County TX - Departments (2026 county census)
- Comanche County TX - Departments (2026 county census)
- Comanche County Subdivision Regulations, quoted and re-checked
- Comanche County Subdivision Regulations, quoted and re-checked
- 2024 Application for On-Site Sewage Facility, quoted and re-checked
- Getting a Permit for an OSSF - Such as a Septic System (2026 county census)
- Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
- Comanche County, Texas Subdivision Regulations, quoted and re-checked
- Texas law on county zoning and building authority
- Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
- Comanche County Subdivision Regulations, quoted and re-checked
- Comanche County Subdivision Regulations, quoted and re-checked
- Middle Trinity Groundwater Conservation District Well Registration, quoted and re-checked
- Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
- Comanche County Subdivision Regulations, quoted and re-checked
- Texas Occupations Code Chapter 1201, Manufactured Housing, quoted and re-checked
- Comanche County Subdivision Regulations, quoted and re-checked
- Comanche County Subdivision Regulations, quoted and re-checked
- Comanche County Commissioners Court (comanchecountytx.gov)
- Comanche County Clerk (comanchecountytx.gov)
- Comanche County Judge's Office (OSSF Authorized Agent) (comanchecountytx.gov)
- Comanche County, Texas Subdivision Regulations, quoted and re-checked
- 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
- Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
- Share of years in severe drought: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.