Selling or buying a home on septic or a well in Missouri
Missouri does not have a statewide law requiring a septic inspection when you sell a home. Some counties require one by local ordinance; everywhere else, the inspection still happens anyway: FHA, VA, USDA, and cautious conventional lenders all require the septic and well to be sound before they'll fund your buyer's loan.HomeCleared is starting with the counties below.
Statewide position confirmed against the Missouri DHSS Onsite Wastewater Treatment Program FAQ, 2026-09-10.
Launch counties
St. Charles County
Requires a county compliance inspection of the septic system and/or well before the title can transfer.
County requirement confirmed
Jefferson County
A septic inspection at sale is driven by the buyer’s loan and contingency, not a confirmed county mandate. County process and contractors differ locally.
Verifying the county rule
Warren County
The county Sanitarian runs septic permitting; an existing-system inspection is available. Whether it is mandatory at transfer is being confirmed.
Verifying the county rule
Christian County
County onsite ordinance since 1992, with county-certified installers. The at-sale requirement is being confirmed.
Verifying the county rule
Camden County (Lake of the Ozarks)
Very high septic density; lake-adjoining lots always need a permit. The at-sale requirement is being confirmed with the county Wastewater Department.
Verifying the county rule
What changes county to county
Even where the state rule is the same, the county authority, the forms, the fees, the repair-permit timeline, and the list of licensed inspectors and installers are all local. That is what each county page covers — not a re-worded version of the same answer.