Unincorporated Liberty County, Texas requires a building permit for any structure 100 square feet or larger, including a house, mobile home or storage building, but the county has no zoning ordinance to restrict where you put it123. The Liberty County Permit and Inspection Department will not issue that building permit until you can prove an existing septic system works or buy a permit to install one2. The same department issues septic permits, since it also serves as the county's TCEQ-authorized agent4.
At a glance
- Building permit
- Required for any structure 100 sq ft or larger, even a mobile home2
- Zoning
- No countywide zoning ordinance3
- Septic permit
- Issued by the Permit and Inspection Department as TCEQ's authorized agent; $275 fee42
- RV living
- Unrestricted by county zoning outside city limits5
- Tiny home
- Unrestricted by county zoning outside city limits5
- Minimum home size
- No county minimum; the county has no zoning to set one5
- Building permit fee
- $125 outside the floodplain2
- Floodplain building fee
- $125 plus $0.15 per square foot of living space2
Who to call
Building permits
Liberty County Permit and Inspection Department – Liberty Office
Building permits, floodplain administration, culvert/driveway permits and OSSF (septic) permits for the northern part of unincorporated Liberty County
311 Travis Street, Liberty, Texas 77575
Building permits
Liberty County Permit and Inspection Department – Cleveland Office
Building, floodplain, culvert/driveway and OSSF (septic) permits for the southern part of unincorporated Liberty County
1616 County Road 3549, Cleveland, Texas 77327
Building permits
Liberty County Permit and Inspection Department (Building & Septic Permit Guide)
Publishes the county's building-permit and OSSF (septic) permit fees and requirements
Roads & driveways
Liberty County Fee and Use Schedule
Publishes Liberty County's permit application requirements, culvert/driveway standards and subdivision plat fees
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 Liberty County, Texas?
Liberty County requires a permit for any building 100 square feet or larger constructed or moved onto a property12. That covers houses, mobile homes, storage buildings, garages and workshops, not just new construction2. Outside the mapped floodplain the permit fee is $125; inside the floodplain it's $125 plus $0.15 per square foot of living space, and a floodway building also needs a no-rise certificate on top of an elevation certificate2. Anyone who starts or finishes permitted work before pulling the permit pays double the fee under a policy the commissioners court approved June 9, 20266.
Who is the Liberty County building department, and how do you reach them?
The Liberty County Permit and Inspection Department issues building, floodplain, culvert/driveway and septic (OSSF) permits for unincorporated Liberty County6. Its Liberty office is at 311 Travis Street and is reached at (936) 336-4560 during office hours of Monday through Friday, 8:00 a.m. to 4:00 p.m.6. A second office in Cleveland, at 1616 County Road 3549, is reached at (832) 579-1135 and serves the southern part of the county7. Some of the department's own permit guides still list an earlier Liberty office street address, so call ahead to confirm which office to visit before you drive over2.
Does Liberty County have zoning?
Liberty County has no countywide zoning ordinance3. Texas gives counties general zoning power only over a handful of specially designated areas, such as parts of Padre Island in Cameron or Willacy County, and Liberty County is not one of them8. Because the county has no zoning authority here, there's no county minimum lot size, setback, dwelling size or lot-coverage rule, and county zoning doesn't restrict accessory dwellings, RVs, tiny homes or manufactured homes5. That doesn't mean anything goes on the land: the building, septic and floodplain permits the Permit and Inspection Department enforces still apply regardless of zoning6.
How do septic permits work in Liberty County?
Liberty County is TCEQ's authorized agent for on-site sewage facility (OSSF) permits, and the same Permit and Inspection Department that issues building permits issues septic permits4. The septic permit fee is $275.00, and every application needs an affidavit to the public recorded at the county clerk's office, a signed two-year maintenance agreement, a site evaluation, a soil analysis and a drawing of the system design2. The design and application must be prepared by a TCEQ-licensed sanitarian and the system must be installed by a TCEQ-licensed installer9. After the first two-year maintenance contract runs out, the property owner has to keep an annual maintenance agreement in place for the life of the system9. Because the county won't issue a building permit until you can prove an adequate OSSF exists or buy a permit to install one, start the septic process before you finalize house plans2.
Can you live in an RV or tiny home on your land in Liberty County?
Liberty County has no zoning ordinance, so county zoning does not restrict where or how long you live in an RV or tiny home on your own unincorporated land5. This is a real answer, not a gap in the research: Texas law doesn't give Liberty County general zoning power, so there's no zoning district to set that kind of restriction5. The county's permit system still reaches a placed home indirectly: a mobile home moved onto the property counts as a building 100 square feet or larger and needs the same permit, and the same proof of septic, as a house2. A dedicated RV park or mobile home park is a separately permitted use, distinct from a single RV or tiny home on a private tract9.
Building a home in Liberty County, Texas: the steps, in order
- Confirm the parcel's 911 address, secured from the Liberty County Appraisal District, since the permit application requires it9.
- Get the property evaluated for septic: hire a TCEQ-licensed site evaluator or engineer, get a site evaluation and system design, sign a two-year maintenance agreement, and record an affidavit to the public at the county clerk's office29.
- Apply for the $275.00 septic permit and the $125.00 building permit (or $125.00 plus $0.15 per square foot if the lot is in the mapped floodplain) at the Liberty or Cleveland Permit and Inspection office26.
- If the lot is in a Special Flood Hazard Area, get an elevation certificate from a licensed surveyor or engineer, plus a no-rise certificate if it's in the floodway2.
- If you need a driveway culvert onto a county road, get a culvert/driveway permit; the minimum culvert length is 20 lineal feet and the maximum is 50 lineal feet, with a clean-out required past 30 lineal feet9.
- If your lot is in a subdivision, confirm water, sewer and electrical power are already available there, since Liberty County won't issue a building permit for subdivision construction until they are9.
- If the driveway connects to a state highway rather than a county road, file TxDOT Form 1058 for a separate access permit10.
What to check before you buy land in Liberty County, Texas
Soils: essentially none of Liberty County's soils are free of severe limitations for a conventional septic drain field, only about 0.3% test that way, so budget for an engineered or alternative OSSF system before you make an offer11. Land: the county is flat, with 100% of its land at 15% slope or less, but 56.5% is wooded, so check what clearing a specific lot will need1213. Flooding: the building permit fee itself changes if a lot sits in the mapped floodplain, and a floodway lot needs an extra no-rise certificate, so check the FEMA flood map before you buy2. Climate: the county averages 57.5 inches of rain a year and has spent about 11.9% of recent years in severe drought, a wide swing to plan drainage and water storage around1415. Taxes: the effective property tax rate runs about 1.3%, with a median bill near $2,091 a year1617.
Watch-outs
- Liberty County will not issue a building permit until you can prove an existing septic system works or buy a permit to install one, so start the septic process before you finalize house plans2.
- Some of the county's own permit documents list a different Liberty office street address than the one on the county's current website; call (936) 336-4560 to confirm before visiting in person6.
- Only about 0.3% of Liberty County's soils are free of severe limitations for a conventional septic drain field, so a standard system may not be an option on many lots11.
Sources
- Liberty County - Engineering, Permits and Inspections (2026 county census)
- Liberty County Permit and Inspection Department (Building & Septic Permit Guide) (co.liberty.tx.us)
- Liberty County - Engineering, Permits and Inspections (2026 county census)
- Liberty County - Engineering, Permits and Inspections (2026 county census)
- Texas law on county zoning and building authority
- Liberty County Permit and Inspection Department – Liberty Office (co.liberty.tx.us)
- Liberty County Permit and Inspection Department – Cleveland Office (co.liberty.tx.us)
- Local Government Code Chapter 231, County Zoning Authority (Texas statewide rule), quoted and re-checked
- Liberty County Fee and Use Schedule (co.liberty.tx.us)
- Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
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.