Off-Grid Living in Perry County, Missouri

Perry County, Missouri is one of those places where the answer to "can I do this off-grid?" really depends on whether your land sits inside a town or out in the unincorporated county. I want to be upfront about that split before getting into specifics.

Zoning. The unincorporated part of Perry County has no zoning ordinance at all, according to the county's own local government page. That means if your land is outside Perryville or the City of Perry, there's no zoning permit standing between you and occupying raw land. Step inside Perryville, though, and you're under that city's Municode-hosted ordinances, a completely separate system.

Dwellings, tiny homes, RVs. Because unincorporated Perry County has no zoning, I found no county-level rule restricting dwelling type, size, or RV living out there. I'd treat that as "not confirmed either way" rather than a green light, simply because absence of a found rule isn't the same as an explicit permission. Inside the City of Perry, mobile homes are regulated: a building permit is required, the unit needs to have been manufactured within a set recency window, and it can only be used as a single-family home.

Building codes. Missouri doesn't have a statewide building code that applies everywhere. The state's own dataset of local code adoptions lists Perry County with nothing on the books for residential or energy codes. So building code enforcement in the unincorporated county is essentially not confirmed to exist; the incorporated towns set and enforce their own.

Septic. This is where the county government does step in. Rural properties without central sewage need an individual sewage treatment system approved by the Perry County Health Department, working under state standards set by the Missouri Department of Health and Senior Services. Composting toilets aren't specifically addressed, so check with the health department directly before assuming you're exempt from permitting.

Greywater and rainwater. I couldn't find a Perry County or state rule specifically governing greywater reuse, so that one's genuinely unclear, ask the health department. Rainwater harvesting looks fine; no county restriction turned up, and Missouri's general stance doesn't limit it.

Wells. Well construction is a state matter, not a county one. The Missouri Department of Natural Resources issues well permits and sets construction standards under the Water Well Drillers Act and the Missouri Well Construction Rules. The county health department can help with water testing but doesn't issue well permits itself.

Utilities. No zoning means no zoning-based mandate to hook up to utilities in the unincorporated county. Just remember Perryville or the City of Perry may have their own connection rules I haven't confirmed.

Bottom line: unincorporated Perry County is about as light-touch as it gets on zoning and dwellings, but septic and wells still answer to the health department and state DNR, and towns inside the county play by very different rules.