Off-Grid Living in Callaway County, Missouri

I've been digging into Callaway County, Missouri for anyone thinking about living off-grid there, and the short version is: this is about as close to "regulation-light" as Missouri gets, at least outside the towns.

Zoning and raw land. Callaway County itself says, in its own commission materials, that it has not adopted countywide planning or zoning. That means if you buy unincorporated land, there's no county use-district or setback rule standing between you and building what you want. But that "no zoning" status only applies outside city limits. Fulton, Holts Summit, New Bloomfield, Mokane, Kingdom City, Auxvasse, and Lake Mykee are all incorporated and may run their own zoning and permitting, so if your parcel is inside or near one of those, call the city hall, not the county.

Dwellings, tiny homes, RVs. I didn't find a county ordinance addressing minimum dwelling size, tiny homes, or RV living. Given there's no zoning or building code countywide, that tracks, but I'm treating it as unconfirmed rather than a green light, since a city within the county could easily have its own rule.

Building permits. The county states plainly that no occupancy or building permits are required in unincorporated Callaway County. Again, cities can and do differ.

Septic. This is the one place real regulation shows up. The Callaway County Health Department handles onsite wastewater (septic) permitting under Missouri's statewide DHSS OWTS rules, a two-stage process of site evaluation and then a permit to construct. The county commission has also referenced sewage-related permit requirements tied to a county ordinance. So even without zoning, you can't legally skip septic permitting if you're installing a system. Composting toilets specifically weren't addressed anywhere I found, so confirm directly with the health department.

Greywater. No county or state page I found addresses greywater reuse specifically. Treat this as unclear and ask the health department about their nuisance-based expectations.

Rainwater. No county ordinance restricts collecting it, and Missouri doesn't impose the kind of water-rights restrictions some western states do, so this looks permitted by default.

Wells. Missouri DNR's statewide well construction rules govern drilling. I didn't find a county-level well permitting ordinance beyond that, so the state rules are what apply. The county health department can point you toward water testing options.

Utilities. No ordinance compels hookup to grid power, water, or sewer for a private residence outside city limits. The one administrative catch: if your utility lines (water, electric, phone) need to cross a county road, you need a Utility Right-of-Way permit from the County Road and Bridge Engineer.

Bottom line: Callaway County unincorporated land is genuinely permissive on zoning and building, but septic is real and locally enforced, and everything flips once you're inside a city.