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- Grading, Drainage & Erosion Permits
For any new buildings where the grade of the lot is altered more than three feet. The exception is for new single family residences where the original slope is less than 5%. These permits are governed by Missoula Municipal Code 13.27 (PDF).
Permits expire if work is not started within 180 days of issuance.
Contact Development Services at 406-552-6630.