Off-Grid Living in Obion County, Tennessee

Obion County, Tennessee is one of those places where the honest answer to "what's the rule?" is "it depends which side of a town line you're on." The county itself, per the Obion County government, has not adopted a countywide zoning ordinance. Zoning only exists inside the incorporated towns, Union City, Obion, Rives, Troy, South Fulton, Kenton, and Woodland Mills, and each one runs its own code. If your land sits outside all of those town limits, there's no zoning code governing it at all right now, based on what I found.

That doesn't mean it's a free-for-all, though. Even out in unincorporated Obion County, a building permit is still required, and you'd get it from the Obion County Assessor's Office at the courthouse, not from a zoning department, because there isn't one. Union City has its own Building Codes Department for anything inside city limits. If you're building near a FEMA flood zone, expect extra permitting, and if your project disturbs an acre or more of ground, Tennessee's TDEC requires a stormwater permit. Also worth flagging: state law limits new home construction to one personal residence every two years, per the county's own FAQ page, which is an unusual restriction to keep in mind if you're planning phased building.

For dwellings, tiny homes, and RVs, I could not find an official county or town code spelling out minimum size rules or an RV-as-residence ban. Secondary sites claim restrictions exist, but I'm not going to cite those as fact. Treat this as unconfirmed and assume the state's baseline building code framework applies until a town official tells you otherwise.

Septic is likely handled through Tennessee's TDEC direct-permitting portal now, following the pattern other rural TN counties have moved to, but I couldn't confirm whether Obion's health department still does any local intake. Call before you dig.

Greywater, rainwater harvesting, private wells, and living off-grid utility-wise all seem to default to the Tennessee state baseline, meaning no known county-level restriction on rainwater collection, wells go through a state-licensed driller under the Tennessee Water Well Act, and grid disconnection isn't restricted that I found. But none of these have an Obion-specific official source confirming details, so I'm flagging them as unclear rather than guessing.

Bottom line: this is a county where the paperwork trail runs through the courthouse for unincorporated land and through individual town halls for anything inside city limits. Call ahead either way.