Unincorporated Coke County, Texas requires no building permit and enforces no zoning on rural land12. Texas gives counties no general zoning power, so the county sets no minimum lot size, setback or building-height rule3. Septic is different: Coke County runs its own On-Site Sewage Department, permitting every system directly as a TCEQ authorized agent rather than referring residents elsewhere45. A completed application needs up to 30 days for the county to review before issuing an Authorization to Construct, and no one may begin building the system before that authorization is in hand6.
At a glance
- Building permit
- Not required in unincorporated Coke County; the county has no building department1
- Zoning
- None countywide; no planning or zoning department appears among the county's offices2
- Septic (OSSF)
- Coke County's own On-Site Sewage Department permits every system: $250 for a single-family residence, $410 for commercial7
- RV, tiny home & manufactured home living
- Unrestricted by county rule, since Texas gives the county no general zoning power3
- Minimum lot size / setbacks
- None set by the county; state law doesn't give Texas counties general zoning authority3
- OSSF 10-acre exemption
- Available for a single-family home on a 10+ acre tract if every TCEQ site condition is met8
- Septic application review
- Up to 30 days for the county's Designated Representative to review before an Authorization to Construct is issued6
Who to call
Septic permits
Coke County On-Site Sewage Department (Designated Representative)
On-site sewage facility (septic) permit applications, fees and the Authorization to Construct for Coke County, as a TCEQ authorized agent
2550 State Highway 70, Blackwell, TX 79506
Also useful
Coke County Courthouse (County Judge's Office)
General county government contact at the Coke County Courthouse; the county has no separate building or planning department to direct land-use questions to
13 East 7th, Robert Lee, TX 76945
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 Coke County, Texas?
No, not on unincorporated land. Texas counties generally have no authority to require residential building permits outside city limits, and Coke County's official site lists no building-inspection department1. Texas law would let commissioners court adopt residential building standards by resolution, but only for new single-family or duplex construction started after September 1, 2009, and Coke County's official site shows no such resolution9. Texas municipalities are a different story statewide: state law adopts the International Residential Code (as it existed May 1, 2012) as the municipal residential building code, and the International Building Code as the municipal commercial code, so any incorporated city in or near Coke County follows that baseline10. If your land is inside an incorporated city, check with that city hall rather than the county.
Who do you contact about permits in Coke County?
There's no county building or planning department to call, because unincorporated Coke County has neither a building-permit program nor a zoning ordinance12. For septic systems, Coke County's own On-Site Sewage Department at 2550 State Highway 70 in Blackwell handles permits, fees and inspections directly5. For general county-government questions, the County Judge's office sits at the Coke County Courthouse in Robert Lee11.
Does Coke County have zoning?
No, not countywide. Texas gives counties no general zoning power, and Coke County has adopted no zoning ordinance for its unincorporated land, so there's no minimum lot size, setback, lot-coverage or building-height rule imposed by the county itself3. No planning or zoning department appears among Coke County's listed offices at all2. If your land sits inside an incorporated city, check with that city hall directly, since a municipality's own building code and any local zoning would apply there instead of this county-level answer10.
How do septic permits work in Coke County?
Coke County runs its own On-Site Sewage Department and permits every system directly as a TCEQ authorized agent, rather than sending residents to a neighboring county or a regional TCEQ office45. Fees are $250 for a single-family residence and $410 for a commercial facility, payable to the county's Designated Representative7. The Designated Representative has up to 30 days to review a completed application before issuing an Authorization to Construct, and Coke County states there are no exceptions to having that authorization in hand before construction begins6. Once the system is installed, the county issues a permit to operate only after a successful inspection confirms it meets the state's OSSF rules12. Statewide, a single-family home on a tract of at least 10 acres can skip the OSSF permit only if every TCEQ condition is met: a licensed site evaluation, no nuisance or groundwater pollution, every part of the system at least 100 feet from the property line, on-site effluent disposal, and no other dwelling on the tract8. Soils are a real constraint here: only about 17.4% of Coke County's land has no severe limitations for a conventional septic drain field, so get a site evaluation early13.
Can you live in an RV, tiny home or manufactured home on your land in Coke County?
Yes, as far as county rules go — Coke County has no zoning ordinance to restrict RV, tiny-home, manufactured-home or temporary-camping use on your own land, because Texas counties have no general zoning power here3. That's a statement about county land-use rules only: any structure with plumbing still needs a compliant septic system, so an RV or tiny home with a bathroom still triggers Coke County's OSSF permitting through its On-Site Sewage Department5. This freedom stops at any city line: an incorporated municipality's own building code and land-use rules apply inside its limits instead10.
Building on land in Coke County: the steps, in order
- Confirm whether your parcel is unincorporated county land or inside an incorporated city, since the rules differ sharply2.
- If unincorporated, know that no county building permit or zoning approval is required before you start construction1.
- If you need a septic system, apply through Coke County's On-Site Sewage Department, budgeting $250 for a residential system or $410 for commercial, and wait for the Authorization to Construct before any work begins57.
- Once the system is installed, schedule your inspection with the county before you use it, since a permit to operate follows only a successful inspection12.
- If your driveway will connect to a state highway, submit TxDOT's Permit Form 1058 before you build any new or modified access14.
- If you're building inside an incorporated city, get building approval from that city first — the county's rules above don't apply there10.
What to check before you buy land in Coke County
Soils: only about 17.4% of Coke County's land has no severe limitations for a conventional septic drain field, so get a site evaluation from the On-Site Sewage Department before you count on a standard system135. Access: a new or modified driveway onto a state highway needs a completed TxDOT Permit Form 105814. Flooding: Coke County participates in the National Flood Insurance Program, but no official source confirms a specific county floodplain-development permit process, so ask the County Judge's office directly if your parcel is near mapped flood hazard area11. Taxes: Coke County's effective property tax rate runs about 1.2%, with a median annual bill near $1,3401516. Setting: the county has no federal land, population density is very light at about 3.7 people per square mile, and the nearest metro area is roughly 61 miles away171819.
Watch-outs
- Coke County's official site does not explicitly say whether the county requires residential building permits or inspections; the "not required" answer here follows from Texas counties generally lacking that authority and the county's site listing no building department, so confirm with the County Judge's office for your specific project11.
- No official Coke County floodplain-development permit rule was confirmed during research, even though the county participates in the National Flood Insurance Program; ask the County Judge's office before you build near a floodplain11.
- "Unrestricted" RV, tiny-home and manufactured-home rules apply only to unincorporated county land; any incorporated city in Coke County follows its own building code10.
Sources
- Coke County, Texas - Official County Website (2026 county census)
- Coke County, Texas - Official County Website (2026 county census)
- Texas law on county zoning and building authority
- Coke County On-Site Sewage Department (2026 county census)
- Coke County On-Site Sewage Department (Designated Representative) (co.coke.tx.us)
- Coke County On-Site Sewage Facility Permit Information, quoted and re-checked
- Coke County On-Site Sewage Facility Permit Information, quoted and re-checked
- Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
- Local Government Code Chapter 233, County Regulation of Housing and Other Structures (Texas statewide rule), quoted and re-checked
- Texas Local Government Code Chapter 214, Section 214.212 — International Residential Code, quoted and re-checked
- Coke County Courthouse (County Judge's Office) (co.coke.tx.us)
- On-Site Sewage Facilities Permit, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- General Access Driveway Policy, quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Federal land share: Bolthole Index county data
- Population density: Bolthole Index county data
- Distance to the nearest metro area: 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.