Off-Grid Living in St. Francois County, Missouri

I'll be upfront: St. Francois County, Missouri is one of those places where the paper trail is thinner than I'd like, so a lot of what follows is "here's what I found, here's what to confirm yourself."

Zoning. I could not find a countywide zoning ordinance or planning department for St. Francois County. What I did find is that cities inside the county, Farmington being the clear example, run their own planning and zoning function. That strongly suggests zoning is handled at the municipal level here, not the county level, which means unincorporated land may fall outside any zoning code at all. But I don't have an official page stating that outright for unincorporated parcels, so treat it as likely, not certain, and confirm with the county before you buy raw land expecting no rules.

Dwellings, tiny homes, RVs. No official county document on minimum dwelling size, tiny home standards, or RV residency turned up in my research. This is a genuine gap. If you're inside a city like Farmington, ask their planning office directly; for unincorporated county land, I'd call the County Clerk's office since they handle permits and ordinance records.

Building permits. The St. Francois County Clerk's office issues building permits and keeps records of ordinances, and there's an actual Building Permit form on the county's site. What I can't confirm officially is which building code edition (IRC, IBC, etc.) the county has adopted, or whether that permit requirement even reaches unincorporated land. Don't take a commercial site's word for the code edition, ask the Clerk directly.

Septic. This one's clearer. The St. Francois County Health Center runs its own onsite wastewater treatment system (OWTS) permitting program through its Environmental Health Department, rather than deferring entirely to the state. You need an OWTS Construction Permit for new systems or major repairs. Missouri DHSS sets the statewide baseline rules, but the county health department is the one issuing permits locally. Composting toilets aren't addressed anywhere official that I found.

Greywater. Genuinely unclear, both at the state and county level. No official Missouri or St. Francois County page spells out residential greywater reuse rules. Ask the county's Environmental Health Department before you build a greywater system.

Rainwater harvesting. Nothing in county sources restricts it, so the general state-level allowance appears to apply here without local modification.

Wells. No county-specific well permitting office turned up. Well construction falls under Missouri DNR's statewide Water Well Drillers Act program, and that appears to be the operative authority here rather than anything county-specific.

Utilities. I found no county ordinance banning off-grid living or mandating hookups. The real compliance points are septic and well rules, not a direct prohibition on going off-grid.

Bottom line: septic is the one area with real teeth and a clear local authority. Zoning, dwelling rules, and greywater are foggy enough that a phone call before you commit to land is worth your time.