Off-Grid Living in Brown County, Ohio

I've spent time digging through Brown County, Ohio's official pages to piece together what off-grid living actually looks like here, and the honest answer is: it depends heavily on whether you're in the unincorporated county, a township, or a village like Mt. Orab. I'm not a lawyer, and I haven't built or lived on land here myself, this is a research summary, so always confirm specifics with the named offices before you buy land or start building.

Zoning in unincorporated Brown County is handled by the Brown County Planning Commission, which administers zoning and development regs and advises the County Commissioners on land use. Villages like Mt. Orab run their own separate zoning permit process for anything inside village limits. I couldn't find a specific minimum-acreage or raw-land-occupancy rule for the unincorporated county in official sources, so that's not confirmed, call the Planning Commission to ask about your specific parcel.

Dwellings, tiny homes, and RVs are governed partly by Ohio state law (Ohio Revised Code Section 519.212), which protects permanently sited manufactured homes from township zoning bans and generally restricts travel trailers, park trailers, and non-permanently-sited manufactured homes from residential zones. Brown County's Building Department says it no longer issues manufactured-home permits or inspections itself, that function has apparently moved elsewhere at the state level, but I couldn't confirm exactly where. Local tiny-home or RV occupancy-duration rules for Brown County specifically are not confirmed.

Building permits for standard construction go through the Brown County Building Department, which enforces the Residential Code of Ohio. In Mt. Orab, you need a village zoning permit before applying for the county building permit.

Septic systems are permitted and required through the Brown County Health Department, since most of the county has no municipal sewer. The county follows state rules (Ohio Administrative Code 3701-29-15) with locally adopted separation-distance standards. Composting toilets aren't separately addressed, so treat them as falling under the same septic framework until you confirm otherwise with the Health Department.

Greywater falls under Ohio's statewide sewage treatment code (OAC 3701-29), enforced locally by the Health Department, which can adopt stricter rules. No Brown County-specific greywater variance was found.

Rainwater harvesting and cisterns are explicitly recognized as an acceptable private water source by the Health Department, permitted the same way as wells.

Private wells require a permit from the Brown County Health Department, consistent with state rules; non-potable wells (irrigation, geothermal) are exempt under OAC 3701-28-01.

Utility disconnection: I found no county law mandating hookup to electric or water utilities in unincorporated areas, but occupancy still requires passing inspections, so full self-sufficiency has to clear those hurdles first. Villages may have their own separate rules I haven't confirmed.