§ MT Montana
County permits
Yellowstone County
Yellowstone County issues permits only for unincorporated areas. Inside an incorporated city? Pick the city below — its building department handles your permit.
§ 01 Unincorporated
Unincorporated Yellowstone County.
If your property isn't inside an incorporated city, the county permit office handles your application directly.
- Permit authority
- Montana Building Codes Program (Building and Commercial Measurements Bureau, Montana Department of Labor and Industry)
- Website
- EBIZ Montana ↗
- Online portal
- EBIZ Montana ↗
- Phone
- (406) 841-2056
- buildingcodes@mt.gov
- Address
- 301 South Park Ave., Floors 4-5, Helena, MT 59620
§ 02 Jurisdictions
Cities in Yellowstone County
Click any city for its full permit guide — authority, fees, application steps, inspections, and exempt work.
§ 03 County navigation
Information last verified for Yellowstone County, Montana. Permit rules and fees change frequently — verify current requirements with the issuing department before applying. Jaspector is an educational reference, not legal advice.