Off-Grid Living in Clinton County, Ohio

If you're looking at land in Clinton County, Ohio for an off-grid setup, the first thing to understand is that "zoning" here isn't one uniform county rule, it depends on your township. According to Clinton County Building & Zoning, most townships in the county are "zoned communities" and fall under the Clinton County Zoning Resolution, which means you'll need a zoning permit before you build anything. But Clark and Washington townships are un-zoned, meaning there's no local zoning at all there, and raw-land occupancy defaults to state law. On top of that, the City of Wilmington and the Village of Blanchester each run their own separate zoning and building departments inside their limits, so if your parcel is inside one of those, forget the county rules and call the municipality directly.

For structures, the county requires a zoning permit before you can even apply for a building permit in the zoned townships. The county enforces the state's Residential Code of Ohio (with recent amendments), through its Building & Zoning Department. I did not find county-specific guidance on tiny homes or RVs as permanent dwellings, that's genuinely unclear and worth a direct call. I did find that shipping containers are not treated as a permitted accessory structure under the county's zoning resolution, which tells me the county is not lenient toward alternative structures generally.

Septic and wells are handled countywide, regardless of township zoning status, by the Clinton County Health District, which administers state rules (Ohio Administrative Code chapters covering sewage treatment systems and private water systems). Only registered installers can pull a septic permit. Composting toilets aren't separately addressed, so I'd assume the same state framework applies until you confirm otherwise with the Health District. Greywater reuse likewise falls under that same state administrative code, with no distinct Clinton County ordinance found, so expect to need a permit through the same Health District office.

Rainwater harvesting via cisterns is explicitly allowed and treated similarly to a private water system component. Wells are permitted with a Health District permit, and notably, a private water systems permit is not required for things like non-potable wells, ponds, springs, or cisterns not built as a formal private water system, per state rules the county cites.

Living fully off the utility grid, no electric or water hookup, isn't addressed one way or the other in anything I found from the county. That's a real gap: nobody has told me it's banned, but nobody's confirmed it's fine either, so ask Building & Zoning directly for your specific township.

Bottom line: your township matters enormously here, so figure out which one your land sits in before assuming anything.