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

Unincorporated Liberty County requires a building permit for a building over 100 square feet constructed or moved onto the property, including mobile homes and carports¹. The county’s separate building guide says 100 square feet or larger, so ask the Permit and Inspection Department before treating an exactly 100-square-foot building as exempt^1,5. The building permit fee is $125 outside the floodplain, or $125 plus $0.15 per square foot of living space in the floodplain⁵. Work begun without the required building permit is subject to double fees¹. Inside Cleveland, the city handles building permits for construction and other listed improvements; the county handles septic within its OSSF jurisdiction, subject to exceptions for other existing programs and TCEQ regional responsibility^2,4.

The Liberty County Permit and Inspection Department is the contact for county building-permit requirements and approvals before work begins¹. The Liberty office is at 311 Travis Street, Liberty, Texas 77575; call (936) 336-4560 during Monday–Friday office hours of 8:00 a.m. to 4:00 p.m¹.. The Cleveland county office is at 1616 County Road 3549, Cleveland, Texas 77327; call (832) 579-1135¹. Bring a 911 address, driver’s license, deed, existing-OSSF inspection report, electric-provider account number and payment method for a building, mobile-home or electric-meter permit⁸. We could not confirm the county’s building-code edition, inspection schedule or certificate-of-occupancy requirement; ask the department what your project needs.

Unincorporated Liberty County has no county zoning ordinance¹. County zoning therefore sets no minimum lot size, setback, dwelling size or lot coverage, and does not restrict accessory dwellings, RVs, tiny homes or manufactured homes on unincorporated land⁷. Building-permit requirements, septic approval and floodplain development approval still apply where required^1,6,9. Inside Cleveland, the city administers its own zoning; county septic authority applies only within the county’s OSSF jurisdiction, which excludes areas covered by other existing programs or assigned to the corresponding TCEQ regional office^3,4.

The Liberty County Permit and Inspection Department handles on-site sewage facility (OSSF) permits within the county’s jurisdiction; the county order excludes areas under other existing programs or the corresponding TCEQ regional office⁴. Start by contacting a Texas-licensed septic installer, site evaluator, registered sanitarian or engineer⁶. The $275 septic permit application needs a site evaluation, system layout/design, signed two-year maintenance agreement and notarized affidavit recorded with the county clerk⁶. Owners must keep a maintenance agreement with a TCEQ-licensed maintenance contractor in place⁶. Texas generally requires a septic permit to construct, install, alter, extend or repair an OSSF¹⁰. The 10-acre exemption requires a licensed site evaluation, a single-family home that is the only dwelling on at least 10 acres, every system part at least 100 feet from the property line, on-property effluent disposal and no nuisance or groundwater pollution; local requirements can be stricter, so confirm eligibility with the department¹⁰. A septic exemption does not resolve the building application: Liberty County still requires existing-system proof or purchase of a septic permit before issuing a building permit⁵.

For RV or tiny-home plans on unincorporated Liberty County land, separate the zoning answer above from building and wastewater requirements^1,7,10. A tiny home over 100 square feet constructed or moved onto the property falls within the county’s stated building-permit threshold, and mobile homes are expressly included¹. Liberty County requires existing-septic proof or purchase of a septic permit before issuing a building permit⁵. We could not confirm an off-grid sanitation alternative for Liberty County; ask the Permit and Inspection Department how your proposed wastewater system would be approved.

1. Secure a 911 address from Liberty CAD and gather your driver’s license, deed, electric-provider account number, payment method and an inspection report if using an existing septic system^8,11.
2. For a new OSSF, contact a Texas-licensed septic professional for the site evaluation and design, maintenance agreement and recorded affidavit; the septic permit fee is $275⁶.
3. Submit the building application with the legal description, building size, bedrooms and value; mobile homes also need year and model information¹.
4. Obtain county approval before development in a flood hazard area unless exempt; provide an elevation certificate in the floodplain and a no-rise certificate in the floodway⁹.
5. For a county-road driveway culvert, apply with your 911 address, driver’s license, deed and payment method, and arrange county inspection to confirm sizing; unpermitted culverts can be removed⁸.
6. For a subdivision lot, confirm water, sewer and electrical power are available before seeking the building permit⁸.
7. For state-highway access, submit TxDOT Form 1058 for the separate driveway access permit¹².

Soils: only about 0.3% of Liberty County’s soils are rated “not limited” for a conventional septic drain field; get a site evaluation and budget for a possible engineered system, rather than assuming septic is impossible¹³. Land: 100% of the county’s land has slopes of 15% or less, and 56.5% is wooded, so assess clearing and drainage on the actual lot¹³. Flooding: county approval generally precedes development in flood hazard areas, with additional certificates for floodplain or floodway building applications⁹. Dividing land: unincorporated subdivisions outside a city’s extraterritorial jurisdiction need Commissioners Court approval and a recorded plat before lot sales, subject to exemptions including qualifying agricultural uses and certain close-family divisions^4,14. Taxes: Liberty County’s effective property tax rate is about 1.3%, with a median annual bill near $2,091¹³.