Construction Permits

All Construction Activities

Construction permit holders must prevent all mud, dirt, rock, sand, and debris from being spilled or dragged onto streets and rights-of-way outside the construction site. This includes proper set-up of temporary construction site access (see STD-408) and construction site cleanup and right-of-way protection (see Admin Rule 414).

Any construction work where the grade of the lot or parcel is altered more than three feet requires a Grading, Drainage and Erosion Permit to be submitted to City of Missoula Development Services for review. For more details see Ordinance 3580's MMC 13.26, MMC 13.27, MMC 15.65. Exclusions may apply where the site's original slope is less than 5%. Grading, drainage, and hillside standards for slopes greater than 5% are listed in the Residential Site Plan and Commercial Site Plan checklists. If you require assistance contact Development Services at 406-552-6635.

Image taken at a new subdivision, showing the tough fabric filters a construction crew can place aro

Missoula SWPPP Instructions

Any construction activity that results in disturbance of one acre or greater total land area requires additional permit coverage. This total disturbance may include any clearing, excavating, grading, stockpiling earth materials, placement or removal of earth material performed during the construction project. If so, the construction activity’s owner or operator is required to follow the below steps:

  1. Obtain and submit to Montana DEQ the Storm Water Construction General Permit Application Package. For this, the owner or operator is fully responsible. This 2018 Montana DEQ application package may include the items listed below:
  2. Montana DEQ will review and will provide an approval letter.
  3. Once the Storm Water Construction General Permit Application Package has been approved by Montana DEQ, then the following should be submitted to City of Missoula's Development Services:
  4. City of Missoula's Development Services' engineering staff will review. And when approved, the City will then issue a permit for your construction activity.
  5. If the construction activity requires a permit transfer, both Montana DEQ and the City of Missoula Development Services require the owner or operator to submit a Permit Transfer Notification (PTN).
  6. When your construction activity is completed to the specific item instructions, submit a Notice of Termination (NOT). This is to be submitted to both Montana DEQ and the City of Missoula Development Services engineering staff.

If you have construction project complaints or suspect illicit discharge, report online anonymously. To reach the general spill hotline during business hours call 406-258-4890, or, for after hours dispatch call 911.