Off-Grid Living in Dade County, Missouri

I've spent a good chunk of time digging through Dade County, Missouri's official sources, and the honest headline is: this is a light-touch county for zoning and building, but septic and wells are firmly regulated by state and local health authorities. Here's what I found, and where I hit walls.

Zoning and land use. I could not find a countywide zoning ordinance on Dade County's official site. Under Missouri law (Chapter 64 RSMo), second- and third-class counties like Dade can only adopt planning and zoning after voters approve it, and many rural counties never bother. So Dade appears to have no countywide zoning, though a town like Greenfield could have its own rules I wasn't able to confirm separately. If you're eyeing raw land, call the county clerk's office to be sure before you assume anything goes.

Dwellings, tiny homes, RVs, and building permits. I found nothing from the county addressing minimum home size, tiny homes, or living in an RV, and no evidence of a county building department or adopted building code (IRC/IBC/IECC). Missouri doesn't mandate a statewide code, and adoption is county-by-county, so absent confirmation, this looks like a place where building permitting simply isn't imposed at the county level. Don't take my word as gospel here, though, it's a "not confirmed" rather than a guarantee.

Septic systems, this is where Dade County actually regulates. The Dade County Health Department enforces an adopted sewage ordinance tied to Missouri Department of Health and Senior Services (DHSS) standards. Every onsite sewage system needs a permit to construct, and installers must be state-registered. There are no property-size exemptions. Percolation tests aren't accepted, soil morphology reports are required instead, and if a lagoon doesn't meet setbacks, you're looking at an engineer-designed system. Composting toilets aren't separately addressed, so treat any wastewater plan as subject to this ordinance until the health department tells you otherwise.

Greywater. No specific rule found, county or state. It's genuinely unclear, so ask the health department directly.

Rainwater harvesting. No Dade County restriction found; Missouri generally protects the right to collect rainwater, so this looks fine.

Wells. Missouri DNR sets statewide well construction standards (RSMo 256.600-640) with permitted drillers required, though landowners drilling their own well are exempt from that particular permit (other rules still apply). The Dade County Health Department also offers bacteria water testing and technical help. No extra county well ordinance was found beyond the state layer.

Utilities. No ordinance forcing a grid connection was found, and with no confirmed zoning or building code tying occupancy to utility hookups, off-grid living looks permitted here, septic being the main regulatory checkpoint you'll actually run into.

Bottom line: Dade County is loose on zoning and building, but strict on septic. Confirm everything with the offices below before you build.