Building permits, zoning and septic rules in Cumberland County, Tennessee

Yes. Cumberland County requires a building permit for residential new construction and for county-regulated commercial work¹. A new home also requires plumbing and mechanical, HVAC or gas-piping permits¹. Cumberland County's residential and commercial codes took effect in 2024; residential work uses the 2018 International Residential Code with local amendments and deletions². The county inspects new residential construction but excludes residential remodels and additions from the inspection scope stated in the adopting resolution; specified commercial construction and occupancy-change work is inspected². Agricultural buildings, plus accessory buildings, garages and decks that are not part of new residential construction, are exempt from permits under that resolution². Confirm the exemption with the Codes Department before work begins.

The Cumberland County Codes Department is the local building office for county-regulated work outside the City of Crossville⁴. Call (931) 710-5727, email codes@cumberlandcountytn.gov or visit 1760 S Main Street in Crossville⁴. Applications may be filed there or through the county's online permit portal⁸. A complete application may require address verification, a septic permit and layout, construction plans, and a homeowner affidavit when applicable; a state-licensed general contractor must establish an account before pulling permits⁸. County fees vary by project valuation and square footage; a $100 re-inspection fee applies after two no-charge re-inspections⁹. An owner-occupant may act as general contractor on one personal residence every two years, but the home cannot be for resale, lease or rent, and hired contractors must be licensed⁶. Inside Crossville the city uses ICC building codes, so confirm with the city codes department before assuming the county's rules apply³.

Land-use controls vary across Cumberland County, so the parcel's jurisdiction matters³. We could not confirm a general countywide zoning ordinance for unincorporated land; ask the Planning Commission at 931-979-2170 about the parcel^10,11. Crossville has zoning for airports, floodplains, signs, mobile homes and mobile-home parks, but no general residential, commercial or industrial districts³. County subdivision rules apply outside the Crossville planning jurisdiction and the municipalities of Crab Orchard and Pleasant Hill¹². Within that county planning jurisdiction, subdivision lots have road setbacks of 30, 40 or 50 feet depending on road class and side and rear setbacks of 10 feet¹². Residential subdivision minimum lot area ranges from 6,000 square feet with public water and sewer to 2 acres with private water and septic¹².

TDEC handles septic permitting in Cumberland County, not the county Codes Department⁴. A state septic permit is required to construct, modify or repair a system serving residential, commercial or industrial property⁵. Tennessee advises obtaining the septic permit before starting dirt work or construction of any building, including the building pad¹³. Obtain the septic approval early also because the county permit application may require the septic permit and layout⁸. After installation, the installer must arrange TDEC's final inspection before covering the system; an approved installation receives a Certificate of Completion⁵. Only 4.6% of Cumberland County soils rate free of severe limitations for a conventional drain field, so establish a workable system and reserve area before committing to a homesite⁷. In county-regulated subdivisions, lots using private water and private sewage disposal generally require at least 2 acres, subject to the Environmentalist and site conditions¹².

We could not confirm a Cumberland County rule for long-term RV occupancy, temporary camping, tiny-home occupancy or manufactured-home occupancy on private land. Ask both the Cumberland County Codes Department and Planning Commission about the exact parcel and proposed use before placing or occupying a unit^4,11. Crossville separately regulates mobile homes and mobile-home parks, so land inside the city needs a city-specific answer³. A tiny home used as a dwelling should not be treated as permit-exempt merely because it is small: Cumberland County requires permits for residential new construction in the county's jurisdiction¹. Any septic system must go through the state permit process⁵. We could not confirm a general minimum dwelling size or rules for off-grid sanitation; ask the two county offices before buying or building.

1. Confirm whether the parcel is in the county planning jurisdiction, Crossville, Crab Orchard or Pleasant Hill because land-use rules vary³.
2. If land is being divided, submit the required plat before recording or selling a lot and verify the applicable lot size, setbacks and access¹².
3. Have TDEC approve the septic system and obtain the layout needed for the county application^5,8.
4. Assemble the plans and homeowner affidavit if applicable, then apply online or in person^6,8.
5. Obtain the building, plumbing and mechanical permits required for a new home¹.
6. Schedule the required inspections; the county will not schedule them without a permit¹.
7. Pass final inspection and receive the certificate of occupancy before moving in furniture or occupying the home⁸.

Start with septic suitability: only 4.6% of Cumberland County soils rate free of severe limitations for a conventional drain field⁷. Confirm the parcel's jurisdiction and whether subdivision review applies, because county subdivision rules exclude the Crossville planning jurisdiction, Crab Orchard and Pleasant Hill¹². New subdivision lots in the county planning jurisdiction generally need at least 50 feet of road frontage, while a qualifying cul-de-sac lot may have 30 feet; a narrow access easement must meet separate conditions¹². Where public water or sewer is reasonably accessible in a county-regulated subdivision, the subdivider must connect each lot, and a sewer line within 300 feet triggers a subdivision sewer connection requirement¹². For a driveway on state right-of-way, TDOT requires a permit¹⁴. Cumberland County's median property-tax bill is about $699 per year at an effective rate near 0.3%⁷. Floodplain development in Tennessee is managed by the local community's floodplain administrator, the city's inside city limits and the county's outside them¹⁵.