Off-Grid Living in Harrison County, Missouri

Harrison County sits up in northwest Missouri, county seat Bethany, and it's the kind of rural place where a lot of people assume "no zoning, no rules." That's probably close to true here, but I want to be honest: I could not find an official Harrison County planning, zoning, or building department webpage anywhere. That's not me being lazy, it's just that the county doesn't appear to publish one, which itself tells you something about how lightly regulated the unincorporated areas likely are.

Zoning and land use. Missouri's Chapter 64 RSMo requires counties like Harrison (a second or third-class county) to hold a voter referendum before adopting planning and zoning authority. Many rural Missouri counties have never done this. I couldn't officially confirm Harrison County's status either way, but the absence of any zoning office or ordinance online is a strong hint that unincorporated land may be unzoned. If you're inside Bethany city limits, that's a different story, and you'd want to check with Bethany city hall directly.

Dwellings, tiny homes, RVs. No county or Bethany ordinance text turned up addressing minimum home size or living in an RV or tiny house. Missouri has no statewide dwelling-size standard, so this is purely local, and "local" here means an information gap rather than a green light. Confirm with the county commission office or Bethany before you set up.

Building permits. Missouri has no statewide building code. Whether Harrison County or Bethany requires permits for construction is not confirmed from any official source I found. Don't assume either way, call and ask.

Septic and composting toilets. This one does have real state teeth. The Missouri Department of Health and Senior Services sets baseline standards for onsite wastewater treatment systems (septic), and a construction permit is generally required before you build or majorly repair one, with some exemptions for certain residential properties. Locally, permitting authority usually sits with the county health department, and Harrison County does have a health department, but I couldn't confirm from its site that it actually issues septic permits. Composting toilets aren't addressed anywhere I found.

Greywater. No Missouri statute or Harrison County rule specifically covers greywater reuse. It's genuinely unclear, ask DHSS or the local health department before setting up a system.

Rainwater harvesting. Nothing in county sources restricts it, so the general state-friendly baseline seems to apply, though I couldn't verify a county-specific statement either way.

Wells. Missouri DNR's Water Well Drillers Act and Well Construction Rules (10 CSR 23) govern well drilling statewide, and I found no Harrison County wrinkle on top of that. Expect to work with a licensed driller under state rules.

Utility disconnection. No ordinance requiring grid hookup surfaced. Living off-grid electrically and on a private well appears to be your right here, subject to the state well rules above.

Bottom line: Harrison County looks like light-touch territory, but "looks like" isn't the same as confirmed, and a couple of phone calls will save you headaches later.