Off-Grid Living in Adams County, Ohio

I'll be upfront: Adams County, Ohio doesn't have much of an official web presence for land-use rules, and a lot of the searches I ran kept surfacing Adams County, Colorado instead. So this brief is honest about what's confirmed and what isn't, rather than guessing at numbers that don't exist in my research.

Zoning. I could not find an official Adams County government page describing a countywide zoning ordinance. A local news report suggested the county itself doesn't administer zoning or issue building permits, but I couldn't verify that against an official county source, so I'm calling it not confirmed. Under Ohio law, counties (ORC 303) and townships (ORC 519) can both hold zoning authority, and in practice townships often run their own zoning independent of the county. If you're eyeing land in unincorporated Adams County, the township trustees where the parcel sits are probably your real authority, not the county commissioners.

Dwellings, tiny homes, RVs. No Adams County-specific rule turned up. The state baseline applies: Ohio requires HUD-compliant manufactured homes be allowed wherever conventional single-family homes are, but whether an RV can be a permanent residence or a tiny home meets a minimum size is set locally, likely by the township or by the Village of West Union if you're inside its limits.

Building permits and codes. I found no official county building department page. One non-official source implied there isn't a countywide building code office, which would mean Ohio's statewide Residential Code gets enforced through some other certified jurisdiction, but I couldn't confirm this officially, so treat it as open.

Septic. This one I can confirm: the Adams County Health Department runs the septic program, pointing residents to the Ohio Department of Health's household sewage rules (OAC 3701-29) for guidance. That's the department to call for a septic or composting toilet situation.

Greywater, rainwater, wells. None of these have a confirmed Adams County-specific page. All three default to Ohio's state framework, greywater and wells under OAC 3701-28/3701-29 and ORC 3701.344-.347, rainwater harvesting also under OAC 3701-28. The Adams County Health Department is the most likely delegated authority for permitting, but I couldn't verify that delegation on an official county page, so confirm directly with them.

Utility disconnection. No county ordinance requiring hookup to electric, water, or sewer was found. You'd still need to meet habitability requirements under applicable residential code, but there's no confirmed mandatory-hookup rule at the county level.

Bottom line: Adams County is thin on official online documentation, so plan on phone calls to the Health Department, the Board of Commissioners, and whichever township your land falls in before you buy or build.