Off-Grid Living in Douglas County, Missouri

I'll be upfront: this one was tough to research. Douglas County, Missouri is a small, rural, non-charter county in the Ozarks (the only incorporated city is Ava), and despite several searches I could not find an official county planning, zoning, building, or health department website. What follows leans heavily on the Missouri state baseline, with the gaps clearly flagged so you know what to double-check locally.

Zoning. Missouri law (the county planning/zoning enabling statutes, Chapter 64 RSMo) requires voters in a second- or third-class county to approve zoning before the county can adopt it. Many rural Ozark counties, Douglas County likely among them, have never done this. I could not locate a Douglas County zoning ordinance or map, which is consistent with there being no countywide zoning, but I can't confirm that from an official document. Ava, the one incorporated city, may have its own separate zoning rules.

Dwellings, tiny homes, RVs. No county ordinance on minimum dwelling size, tiny homes, or RV living turned up in my research. If there's no countywide zoning or building code (which seems likely but isn't confirmed), there's probably no local restriction either, but treat that as an educated guess, not a fact.

Building permits. Missouri has no statewide building code, adoption is a local, county-by-county or city-by-city choice. I found no evidence of a Douglas County building department or adopted code, suggesting permits may not be required outside Ava, but again this isn't verified by an official county source.

Septic systems. This one is more solid. Missouri's onsite wastewater treatment program is administered either by a county health department or, where none has taken it on, directly by the Missouri Department of Health and Senior Services (DHSS). I could not confirm a standalone Douglas County health department handling septic permits, so DHSS is the fallback authority here for individual septic systems.

Greywater. No state statute or Douglas County rule specific to greywater reuse showed up in my research. This is genuinely unclear, ask DHSS or whoever handles septic permitting locally before doing anything project-specific.

Rainwater harvesting. Covered by Missouri's statewide rainwater protections; I found nothing at the county level that changes this.

Wells. Well construction statewide, including here, falls under the Missouri Department of Natural Resources (DNR) Water Well Drillers Act and Well Construction Rules. No county-specific well ordinance was found, so DNR's rules are what govern.

Utilities. Missouri law generally protects reliance on a private water system instead of a utility hookup, subject to DNR's well rules. No Douglas County ordinance requiring utility connections was found.

Bottom line: for a rural county like this, a real phone call to the Douglas County Commission (based at the courthouse in Ava) is worth more than anything I can find online. Ask directly whether zoning or a building code exists, since a lot of rural Missouri counties simply don't have either.