Permits & Inspections

For permitting questions, call 406-552-6635. Permit applications, approval time, and relevant codes are listed by individual permit type below.

Inspections
Inspections for existing permits can be scheduled online or by calling 406-552-6040. Building inspection information is on our resources page.

Development Services Permit Types
The following permits are available at the Development Services permit desk, upstairs on the west end of City Hall. Hours of operation are from 8 a.m. to 4 p.m. Monday through Friday.
  • Excavation – required for water, sewer, storm sewer, and other utilities.
  • Paving, grading, ADA are often required as part of a building permit when other work is being done.
  • Fences – find out if your fence needs a permit before you build.
  • Right-of-way – required to work on sidewalks or occupy streets or sidewalks.
  • Storm Water Pollution Prevention Plan (SWPPP) – required for all work on development, parcel, or lot over one (1) acre in size.
  • Building – find out if your project requires a building permit.
  • Commercial building permits
  • Residential building permits
  • Sign permit application and fees
Jurisdiction
All connections and repairs to the city's sewer system require an excavation permit from Development Services. For other permit types, the jurisdictional area is the city limits. Any inquiries on building permits outside the city limits, except for city sewer permits, can be directed to the County Building Inspection Office at 406-258-3701.

Other Permits
The following permits are not issued by Development Services. More information is available from the appropriate department’s page.
  • Alarms – burglary alarms require permits.
  • Burning - permits are always required for outdoor burning.
  • Fireworks & pyrotechnics - permits can be obtained from Financial Services.
  • Parking
  • Street Use – required to hold a parade, run, block party, or other special events on city streets.
  • Tree Planting Permit – to plant trees in the boulevard.
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