Off-Grid Living in Decatur County, Tennessee

I'll be upfront: Decatur County, Tennessee (home to Decaturville and Parsons) doesn't appear to have a searchable, official planning/zoning or environmental-health web page, at least not one I could find in this research. That's a real gap, and I want to flag it rather than paper over it with guesses. A lot of what follows leans on Tennessee state defaults because I couldn't verify a county-specific ordinance.

Zoning. In Tennessee, county commissions generally hold zoning authority in unincorporated areas, but whether Decatur County has adopted its own zoning resolution isn't something I could confirm from an official source. If you're eyeing unincorporated land, don't assume anything, call the county directly. If your parcel is inside Decaturville or Parsons city limits, municipal rules could differ and would take precedence.

Dwellings, tiny homes, RVs. No county ordinance on this turned up in my research. You'll see tiny-home directories claiming they're permitted, but those aren't official sources, so I can't treat them as authority here.

Building permits. This one's actually semi-confirmed: Tennessee's state fire marshal's office (TDCI) lists both "Decatur" and "Decaturville" among places where a state residential permit applies to construction in unincorporated areas. That suggests the county hasn't opted out of code enforcement and the state handles permitting for unincorporated land, rather than a local building department.

Septic and composting toilets. Statewide, TDEC's Division of Water Resources runs septic permitting, often through staff based at county health or building departments. Applications go through TDEC's statewide septic portal. I found nothing suggesting Decatur County has any composting-toilet exemption, so assume the state baseline (permit needed, NSF 41 certification for composting units) applies until told otherwise by TDEC's regional field office.

Greywater. No county-specific rule found. State plumbing code generally allows subsurface greywater irrigation, though enforcement clarity is limited. Treat that as the fallback.

Rainwater harvesting. I found no Decatur County restriction, and Tennessee state law doesn't restrict collecting or using rainwater non-potably. This one looks genuinely open.

Wells. No county-specific well ordinance. Wells need to be drilled or altered by a state-licensed driller under Tennessee's well-construction rules, administered by TDEC. That's just the standard state requirement, unchanged here.

Utilities. No ordinance requiring hookup to public water or sewer for occupied dwellings turned up for Decatur County. Where a public utility district does serve an area, TDEC oversees those systems, but I don't have Decatur County-specific documentation on mandatory connection.

Bottom line: this is one of those counties where the honest answer is "go ask." The Decatur County Clerk's office and the Decaturville or Parsons city halls are your best bets for anything zoning- or building-specific, since I couldn't verify their pages directly.