Off-Grid Living in Clark County, Missouri

I'll say upfront: Clark County, Missouri is one of those places where the honest answer to "is this legal?" is often "there's no rule against it that I could find, but confirm before you build." That's not me being cagey, it's the actual state of the official record for this small rural county in the far northeast corner of the state (Kahoka is the seat).

Zoning and dwellings. I could not find a Clark County zoning ordinance, planning commission, or zoning map anywhere on the county's official website. Missouri law (the Chapter 64 county planning enabling statutes) requires counties like Clark to have voters affirmatively adopt zoning, and it looks like Clark County simply hasn't done that. If that holds up, it means raw-land occupancy, tiny homes, and RV living in the unincorporated county aren't governed by a county zoning code, one way or the other. But I want to be careful here: absence of evidence isn't the same as an official "yes." Call the Clark County Commission or Courthouse before you assume anything. Note that this only covers unincorporated land, incorporated towns like Kahoka may have their own separate building or zoning rules.

Building permits. Same story: no evidence of Clark County adopting the IRC, IBC, or requiring county building permits. Missouri doesn't have a mandatory statewide building code, so without a county-level adoption, construction standards outside incorporated towns don't appear to be regulated. Again, not officially confirmed as "no permit needed," just an absence of a found rule.

Septic. This is the one area where Clark County clearly does regulate things locally. The Clark County Health Department runs the Household Sewage Treatment System Program, permitting and inspecting septic installations, and registering installers and haulers. This sits inside Missouri's statewide framework where DHSS sets minimum standards and county health departments (or local OWTS authorities) enforce them locally. If you're putting in a septic system, this is your permitting stop, no way around it.

Greywater and rainwater. No Clark County or state rule specifically addresses greywater reuse, so I'm marking that unclear, ask the health department directly. Rainwater harvesting looks fine under Missouri's general legal protections, no county restriction turned up.

Wells. Private well drilling is governed statewide by DNR's Water Well Drillers Act and Well Construction Rules, no Clark County-specific add-on found. If you'd rather not drill, Clark County Consolidated Public Water Supply District No. 1 is a DNR-permitted public system serving parts of the county.

Utilities. No Clark County rule against living off-grid (private water, off-grid power) turned up. The state baseline protecting private water systems seems to be what governs, subject to the DNR well rules and county septic permitting above.

Bottom line for research purposes: septic is the hard local requirement, everything else likely defaults to state law or is simply unaddressed at the county level, so a phone call before you commit to a plan is worth the ten minutes.