McMinn County, Tennessee does not require a state or county residential building permit for a home, because the county has opted out of the state's residential building permit program1. No countywide zoning ordinance has been confirmed on an official county source, though the McMinn County Regional Planning Commission does enforce building setbacks and subdivision rules on unincorporated land2. Septic systems are a state matter here too: Subsurface Sewage Disposal System permits are issued by the Tennessee Department of Environment and Conservation, not the county3.
At a glance
- Building permit
- Not required; McMinn County has opted out of the state residential permit program1
- Zoning
- No countywide zoning ordinance confirmed on an official source2
- Septic permit
- Tennessee Dept. of Environment and Conservation (state), not the county3
- Septic soil suitability
- About 25.3% of county soils rate free of severe limits for a conventional drain field4
- Owner-builder / contractor rule
- One owner-builder permit every two years; anyone paid over $25,000 must be a licensed contractor56
- Driveway permit (county road)
- Required; the Highway Department allows driveway connections by permit only7
- Single mobile home / RV as your home
- Not regulated as a "park" under the county's mobile home resolution, but must meet the same standards as a conventional residence and comply with subdivision rules8
Who to call
Planning & zoning
McMinn County Planning Commission
Subdivision plat review and building setback standards for unincorporated McMinn County; meets monthly
Roads & driveways
McMinn County Highway Department
Construction and maintenance of county roads and bridges; issues driveway connection permits
250 County Road 552, Athens, TN 37303
Septic permits
TDEC Chattanooga Environmental Field Office
The Tennessee Department of Environment and Conservation field office serving McMinn County for water-resources matters, including Subsurface Sewage Disposal System (septic) permits
1301 Riverfront Parkway, Suite #206, Chattanooga, TN 37402
Septic permits
McMinn County septic permit line
The phone number McMinn County's own permits page directs residents to call with septic permit questions
Zoning
McMinn County Regional Planning Commission
McMinn County's Mobile Home Park and Travel Trailer Park Regulations, including the individual-mobile-home and owner's-own-dwelling provisions
Planning & zoning
McMinn County Regional Planning Commission — Subdivision Regulations
McMinn County's Subdivision Regulations, including minimum lot size requirements for lots relying on a well and/or septic system
Contact details are copied from each office’s official page and were checked against it on September 25, 2026.
Do you need a building permit in McMinn County, Tennessee?
No: McMinn County has opted out of Tennessee's state residential building permit program, so no state or county structural building permit is required for a home in the unincorporated county1. Statewide, the residential permit program administered by the State Fire Marshal's Office only applies in jurisdictions that have not opted out, and a county legislative body can remove its unincorporated areas from that program the way McMinn has9. Opting out of the building permit does not remove every requirement, though: you'll still need a septic or sewer connection, and if you subdivide land or build a mobile home or travel trailer park you'll run into the county's separate subdivision and mobile-home-park rules108.
Who handles permitting and land-use questions in McMinn County, and how do you reach them?
There is no county building department, since no structural building permit is required. The McMinn County Planning Commission, reachable at (423) 829-0665, reviews subdivision plats and enforces building setbacks on unincorporated land: 35 feet from the front property line, 10 feet from the side property line, and 15 feet from the rear property line11. The Planning Commission meets on the third Thursday of each month11. The McMinn County Highway Department, at 250 County Road 552, Athens, TN 37303, phone (423) 745-1820, maintains the county's roads and allows driveway connections onto them by permit only7. An electrical permit for new construction is purchased through the State Fire Marshal's Office rather than the county11.
Does McMinn County have zoning?
No countywide zoning ordinance has been confirmed on an official McMinn County source, so treat any claim that the whole county is zoned, or that it definitely is not, with caution2. That does not mean unincorporated land is unregulated: the county's Subdivision Regulations set a minimum lot size of 35,000 square feet for a new lot that will rely on both a private well and a septic system, or 20,000 square feet where public water is available alongside a septic system10. Separately, the county's Mobile Home Park and Travel Trailer Park Regulations require a permit for mobile home parks, single mobile homes, and travel trailer parks, and the Planning Commission enforces building setback lines on lots outside those rules811. Tennessee law generally lets county governments adopt countywide zoning for unincorporated territory, so it is worth asking the Planning Commission directly whether McMinn County has done so for your specific area12.
How do septic permits work in McMinn County?
Septic permitting in McMinn County is a state program: Subsurface Sewage Disposal System construction permits are issued by the Tennessee Department of Environment and Conservation, not the county, because McMinn is not one of the small number of Tennessee counties that self-administers its own septic program3. Statewide, a Septic System Construction Permit is required before installing a new system or repairing an existing faulty one, and the review generally takes about 10 days but must be completed within 4513. The TDEC field office covering McMinn County is the Chattanooga Environmental Field Office at 1301 Riverfront Parkway, Suite #206, Chattanooga, TN 37402, phone (423) 634-574514. McMinn County's own permits page also directs residents to call 423.296.2260 with septic permit questions15. Soils here are workable for a conventional system more often than not: about 25.3% of McMinn County's soils rate free of severe limits for a conventional drain field, meaning roughly three out of four sites may need a site evaluation before you know whether a standard system will work4.
Can you live in an RV or tiny home on your land in McMinn County?
McMinn County's own Mobile Home Park and Travel Trailer Park Regulations answer this more directly than most counties' rules do. A permit is required for mobile home parks, single mobile homes, and travel trailer parks under that resolution8. But the resolution goes on to say that an individual mobile home located on a lot by itself is not regulated by the resolution at all — it only has to meet the same standards as a conventional residence and comply with the county's Subdivision Regulations8. The resolution's definition of a "travel trailer park" goes further still, explicitly excluding land put to non-commercial use by the owner, or the portion of land that serves as the owner's own principal dwelling place8. Read together, a single RV or mobile home used as your own home on your own McMinn County land falls outside this park-permitting scheme, though since no countywide zoning ordinance is confirmed and building-permit rules don't apply here either, it's worth calling the Planning Commission to confirm there's nothing specific to your parcel before you rely on this211.
Building a home in McMinn County: the steps, in order
- Confirm you don't need a state or county building permit, since McMinn County has opted out of Tennessee's residential building permit program1.
- Arrange your septic permit through TDEC's Chattanooga Environmental Field Office, or start with McMinn County's own septic line at 423.296.2260, since a septic or sewer connection is still required by state law141513.
- If you're creating a new lot rather than building on an existing one, check McMinn's Subdivision Regulations minimum lot size: 35,000 square feet without public water, or 20,000 square feet with public water available, when relying on a septic system10.
- Confirm your building setbacks with the Planning Commission: 35 feet from the front property line, 10 feet from the side, and 15 feet from the rear11.
- Get an electrical permit through the State Fire Marshal's Office before wiring the home11.
- If your driveway will connect to a county road, get a driveway permit from the Highway Department first, since McMinn County allows driveway connections by permit only7.
- Remember Tennessee's contractor-licensing threshold still applies even without a local building permit: if you pay any one contractor more than $25,000, that contractor must be a licensed general contractor, and an owner building their own residence gets one owner-builder permit every two years65.
What to check before you buy land in McMinn County
McMinn County is a mix of woods and workable ground: about 57.9% of the land is forested, and about 62.1% sits at 15% slope or less1617. Septic soils are workable more often than not, but still limited: about 25.3% of the county's soils rate free of severe limits for a conventional drain field4. Farmland here has averaged around $5,610 an acre and a typical home value near $265,699 in recent data1819; a typical property tax bill runs about $707 a year at an effective rate near 0.4%, and a typical home insurance premium is around $1,558 a year202122. The county sees roughly 56.3 inches of precipitation a year and severe drought in about 8% of years2324. The nearest city of 100,000 or more people is about 43 miles away25. Before closing, confirm the parcel's minimum lot size, setbacks and any zoning specifics with the Planning Commission, and check driveway access with the Highway Department if it touches a county road117.
Watch-outs
- No countywide zoning ordinance has been confirmed for McMinn County on an official source; don't treat the county as either fully zoned or fully unzoned without checking with the Planning Commission first2.
- McMinn County requires no structural building permit, but that does not remove the Subdivision Regulations' minimum lot sizes, the Mobile Home Park and Travel Trailer Park Regulations, building setbacks, or the state septic permit requirement1108.
- Two different phone numbers for floodplain information appear on the county's own site and PDF; this guide did not cite either one because the discrepancy could not be resolved this session — ask the Planning Commission who currently handles floodplain questions11.
Sources
- TN State Fire Marshal's Office - Residential Jurisdictions & Inspectors (2026 county census)
- (2026 county census)
- TDEC - Subsurface Sewage Disposal Systems (SSDS) (2026 county census)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Can I build my own home without a license? (2026 county census)
- Can I build my own home without a license? (Tennessee statewide rule), quoted and re-checked
- McMinn County Highway Department (mcminncountytn.gov)
- McMinn County Regional Planning Commission (mcminncountytn.gov)
- Residential Permit FAQs (Tennessee statewide rule), quoted and re-checked
- McMinn County Regional Planning Commission — Subdivision Regulations (mcminncountytn.gov)
- McMinn County Planning Commission (mcminncountytn.gov)
- Tennessee Attorney General Opinion No. 10-108 (Tennessee statewide rule), quoted and re-checked
- Septic System Construction Permit (Tennessee statewide rule), quoted and re-checked
- TDEC Chattanooga Environmental Field Office (tn.gov)
- McMinn County septic permit line (mcminncountytn.gov)
- Wooded share of land: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Farmland value per acre (USDA census): Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Typical home insurance premium: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
Written September 25, 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.