Building Division
Purpose
The purpose of the building codes is to establish minimum requirements to safeguard the public's health, safety, and general welfare. The building codes are adopted and amended by the State of Montana and then adopted by the City of Missoula. Our jurisdictional area is within city limits of the City of Missoula. If you are building outside of the city's jurisdiction, you will need to contact the Missoula County Building Division.
Current Codes
The City of Missoula adopted the following codes effective September 1, 2022. Building codes are adopted as amended by the State of Montana: [view amendments]. To purchase code books, visit the International Code Council; we recommend also purchasing the sectional tabs for each book.
- 2021 International Residential Code (IRC)
- 2021 International Building Code (IBC)
-
2021 International Energy Conservation Code (IECC)
(See Montana amendments)
- 2020 National Electric Code (NFPA 70)
- 2021 Uniform Plumbing Code (UPC)
- 2021 International Mechanical Code (IMC)
- 2021 International Fuel Gas Code (IFGC)
Design Criteria
| City of Missoula | |
|---|---|
| Frost Depth: 3' | Wind Speed: 105 MPH [IBC see ASCE7] |
| Seismic Category: D0 [IBC see ASCE7] | Climate Zone: 6 B |
| Roof Snow Load: Minimum 30 PSF [IBC see ASCE7 for exact number] | Soil Pressure: 1500-2000 PSF (site specific) [IBC see ASCE7: use default Site Class D ] |
| Air Freezing Index: 2000 | Mean Annual Temp: 45.5 F |
| Weathering: Severe | Flood: [Floodplain Information] |
Roofing Note: This Jurisdiction does require an ice barrier (such as Ice and Water Shield) in accordance with R905.1.2.
- Electrical Permit Information and Questions
- Plumbing Permit Information and Questions
- Mechanical Permit Information and Questions
- Demolition Permit Information and Questions
- Do I need a Building Permit?
- What inspections are required?
- When do permits or applications expire?
- Can I file a complaint about the property I am renting?