Off-Grid Living in DeKalb County, Missouri

I'll be upfront: DeKalb County, Missouri is one of those places where the paper trail thins out fast once you leave city limits, and that's actually useful information in itself.

Zoning. Based on the state's own building-code roster, DeKalb County has not adopted a countywide zoning or building code. That means if your land sits in the unincorporated county, outside Maysville, there's no confirmed zoning ordinance controlling what you build or how you use raw land. Inside Maysville, though, the city runs its own zoning code (Title IV, on eCode360) with districts like A-1 Agricultural and R-1 Residential, administered by a Planning Board and Zoning Commissioner. So the honest answer is: it depends entirely on which side of the city line you're on.

Dwellings, tiny homes, RVs. I found nothing specific to the unincorporated county on tiny homes or RV living. Maysville's code does regulate dwelling placement (one principal building per lot, minimum roof pitch requirements) but that's a city rule, not a county one.

Building permits. Same story: no county-adopted IRC, IECC, or IBC per the state's building-code database. Maysville has adopted the International Property Maintenance Code, a plumbing code, and requires permits plus certificates of occupancy within city limits.

Septic. This is where the state steps in regardless of county silence. Missouri DHSS sets minimum standards statewide for onsite wastewater treatment systems (OWTS), and a permit is generally required before construction or repair. DHSS notes that most counties have a local health department issue these permits, but I couldn't confirm which agency handles that in DeKalb County specifically, so call around (see offices below).

Greywater. No DeKalb County-specific policy found. This one's unclear, and I'd lean on the state DHSS contact for guidance since local rules aren't confirmed either way.

Rainwater harvesting. No restriction found at county or Maysville level, so this appears permitted under the general state baseline.

Wells. Regulated at the state level. Missouri DNR actively tracks DeKalb County's Public Water Supply Districts and Maysville's public water system, but private well construction itself falls under statewide Well Construction Rules, not a county ordinance.

Utility disconnection. In the unincorporated county, I found no rule tying occupancy to utility hookups, so living off-grid appears workable there as long as you satisfy state well and septic requirements. Inside Maysville, nuisance and sanitary sewer provisions in the city code would still apply.

Bottom line: unincorporated DeKalb County looks like light-touch territory on paper, but "not confirmed" isn't the same as "not regulated." Call the county courthouse and the state DHSS office before you commit to anything, especially septic.