Off-Grid Living in Carter County, Missouri

I dig into rural counties like this a lot, and Carter County, Missouri is one of the more "wide open" places I've researched, at least on paper. That said, "no rules found" is not the same as "no rules exist," so let me walk through what I actually found and where the gaps are.

Zoning. Missouri law (Chapter 64 RSMo, the state's enabling statute for county planning and zoning) requires a non-charter county like Carter to hold a voter referendum before adopting any countywide zoning ordinance. I could not find any official Carter County Commission page, ordinance, or code-host record showing that vote ever happened. So as far as the research shows, there's no confirmed countywide zoning here. That's a real freedom for off-grid buyers, but double-check with the Carter County Commission directly, and don't forget that the town of Van Buren or any other incorporated town inside the county could have its own separate zoning that I did not confirm.

Dwellings and building codes. With no countywide zoning found, there's also no confirmed county rule on minimum house size, tiny homes, or RV living. The Missouri Office of Administration's statewide building-code dataset lists no IRC, IBC, or IECC edition adopted for Carter County either, which lines up with the pattern: Missouri lets counties and cities opt into building codes, and Carter County doesn't appear to have opted in. Again, this is what I found in state records, not a guarantee of zero regulation, so confirm with the county before you build.

Septic. This is the one area where Carter County definitely does regulate, through the Carter County Health Center's Environmental Public Health division. They issue the Missouri DHSS On-Site Sewage Disposal System Construction Permit, do a final inspection once your system is installed, and follow state DHSS design and siting standards. They told me directly they don't design your system for you, but they'll offer technical advice. Composting toilets aren't separately addressed anywhere I found; they'd likely fall under the same state OWTS rules.

Greywater. I found nothing specific to Carter County or even Missouri DHSS/DNR generally on greywater reuse. Call the Health Center before assuming any greywater setup is fine.

Rainwater harvesting. No county restriction turned up in my research, and Missouri generally protects a landowner's right to collect rainwater. I'd call this permitted by default, though not something I found spelled out at the county level.

Wells. No Carter County-specific well authority exists that I could find. Well construction and repair fall under Missouri DNR's Water Protection Program and the state's Water Well Drillers Act.

Off-grid utilities generally. No ordinance bans living without utility hookups. Your real constraints are the Health Center's septic permit and DNR's well rules above, plus DNR approval requirements if you're doing a subdivision or larger development using onsite wastewater systems.

Bottom line: Carter County looks genuinely permissive because so little has been formally adopted, but "not confirmed" cuts both ways, so call the Commission and the Health Center before you commit to a plan.