§ MT Montana
County permits
Sweet Grass County
Sweet Grass County issues permits only for unincorporated areas. Inside an incorporated city? Pick the city below — its building department handles your permit.
§ 01 Unincorporated
Unincorporated Sweet Grass County.
If your property isn't inside an incorporated city, the county permit office handles your application directly.
- Permit authority
- Sweet Grass County Planning Department (City-County Planning Office)
- Online portal
- Montana Building Permits Portal ↗
- Phone
- (406) 932-5470
- Address
- Sweet Grass County Annex, 291 Centennial Drive, PO Box 888, Big Timber, MT 59011
§ 02 Jurisdictions
Cities in Sweet Grass County
Click any city for its full permit guide — authority, fees, application steps, inspections, and exempt work.
§ 03 County navigation
Information last verified for Sweet Grass 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.