Off-Grid Living in Sevier County, Tennessee

I've spent time digging through Sevier County, Tennessee's official pages to figure out what off-grid living actually looks like there, and the short version is: this is not a "no zoning, do what you want" county. It's one of the more regulated rural counties in Tennessee.

Zoning. The Sevier County Regional Planning Commission administers a countywide Zoning Resolution, which is unusual for rural Tennessee, where a lot of counties skip zoning entirely. Before you build anything, you'll need a Site Plan Permit and a Zoning Compliance Permit. I'd flag that the county's own paperwork notes a Site Plan Permit is only valid for six months before it lapses if construction isn't moving. If you're inside Sevierville, Gatlinburg, or Pigeon Forge city limits, add another layer: those cities run their own planning departments on top of the county rules.

Dwellings, tiny homes, RVs. This is genuinely fuzzy. Tennessee adopted the 2018 IRC with Appendix Q as a statewide baseline, which is the code path that makes small dwellings easier to permit, but I could not confirm whether Sevier County has specifically adopted or excluded Appendix Q. Tiny houses on wheels tend statewide to get treated like RVs, meaning campgrounds or recreation-zoned land, but I found no county-specific placement ordinance. Call the Planning Department before you buy land assuming you can live in a THOW on it.

Building permits. Required, no ambiguity, at least inside city limits, where Sevierville's Code Enforcement office says plainly that all new construction and remodeling needs a permit. In unincorporated county land, the Site Plan/ZCP process functions as the county's version of the same gate.

Septic and composting toilets. Sevier County is a TDEC "contract county," meaning it runs its own septic permitting through its Division of Environmental Health rather than deferring fully to the state. A septic permit is required for any private wastewater system. I found no confirmed dry-cabin exemption or composting-toilet carve-out at the county level, so assume the state's NSF 41 certification standard applies to composting toilets until Environmental Health tells you otherwise.

Greywater. Not addressed in any Sevier County page I found. The state plumbing code technically allows subsurface greywater irrigation with tank and filtration limits, but I'd call this unclear at the county level and confirm with Environmental Health directly.

Rainwater harvesting. No county restriction turned up in my research; Tennessee's statewide baseline allows it freely for collection, with plumbing code review only kicking in if you tie collected water into household plumbing.

Wells. Well drilling itself is licensed at the state level under the Tennessee Water Well Act, administered by TDEC, not the county. Sevier County also runs its own Water Department for residents outside municipal water service areas, which is worth calling if you're weighing well versus utility hookup.

Disconnecting from utilities. Electric disconnection isn't restricted by anything I found. Water and sewer are different: if you're not on public systems, the county Health Department requires an approved private septic system, so "off-grid" water/waste still means going through a permit process, not skipping it.

Bottom line: Sevier County gives you more paperwork than a typical rural TN county, and a fair number of details (tiny homes, greywater) simply aren't nailed down publicly, so a phone call to Planning & Zoning and Environmental Health before you buy land will save you real headaches.