§ MO Missouri
County permits
Washington County
Washington County issues permits only for unincorporated areas. Inside an incorporated city? Pick the city below — its building department handles your permit.
§ 01 Unincorporated
Unincorporated Washington County.
If your property isn't inside an incorporated city, the county permit office handles your application directly.
- Permit authority
- No countywide building permit department publicly found; Washington County government pages reviewed did not show a building permits office
- Website
- None found ↗
- Online portal
- None found ↗
- Phone
- 573-438-6111
- Address
- 102 N Missouri St, Potosi, MO 63664
§ 02 Jurisdictions
Cities in Washington County
Click any city for its full permit guide — authority, fees, application steps, inspections, and exempt work.
§ 03 County navigation
Information last verified for Washington County, Missouri. Permit rules and fees change frequently — verify current requirements with the issuing department before applying. Jaspector is an educational reference, not legal advice.