Missoula building permits
VerifiedDepartment contacts, adopted codes, permit types, fees, and gotchas for Missoula, Montana.
Last verified 2026-07-02 · Source
Building department
- Address
- 435 Ryman St., Missoula, MT 59802
- Phone
- (406) 552-6630
- Office hours
- Permit/application questions: Mon–Fri 9:00 AM–4:00 PM, (406) 552-6060, coordinators@ci.missoula.mt.us. Building code questions: Mon–Fri 8:00 AM–5:00 PM, (406) 552-6630, BLDG@ci.missoula.mt.us. Inspection scheduling: (406) 552-6040 or text (888) 413-4439.
- Website
- Official site
Codes adopted
Montana adopts a single statewide building code by rule and, by default, enforces it directly — local governments only gain enforcement authority once the state certifies them. Under the Montana Building Codes Act (Mont. Code Ann. Title 50, Chapter 60), the Department of Labor & Industry's Building Codes Bureau adopts one state building code applicable everywhere (§ 50-60-203, codified further at Administrative Rules of Montana Title 24, Chapter 301) — currently the 2021 editions of the IBC, IRC, IMC, IFGC, IECC, IEBC, ISPSC, and UPC, with the 2020 NEC for electrical (effective statewide since 6/11/2022 per the Bureau's own Current Codes page). A city, county, or town may adopt and enforce its own building-code program under § 50-60-301, but its adopted code "may include only codes adopted by the Building Codes Bureau" — a local edition can never diverge from or be less stringent than the state's. Critically, under § 50-60-302, a local government cannot enforce ANY building code — even one it has formally adopted — until the Bureau certifies its program (requiring an approved code, a published fee schedule, an enforcement plan, and properly licensed or nationally certified inspectors); certification is granted per TRADE, not as one blanket designation. The Bureau's own "Certified City, County and Town Programs" list uses the key B=Building, P=Plumbing, E=Electrical, M=Mechanical, SP=Pool, W=Wildland-Urban-Interface — a jurisdiction can be certified for Building only while Electrical/Plumbing/Mechanical remain directly state-enforced within the same city limits (e.g., Havre, Anaconda-Deer Lodge), or certified across all trades (e.g., Billings, Missoula, Great Falls, Bozeman, Helena, Kalispell). Non-certified jurisdictions — most of Montana's unincorporated county land, since very few counties appear on the certified list — fall under direct enforcement by the state Building Codes Bureau (§ 50-60-304). Montana also exempts private homes and buildings of four or fewer dwelling units not serving transient guests from the state building-permit requirement entirely, though electrical, plumbing, and mechanical permits remain separately required regardless. Always confirm with the specific jurisdiction which trades it is certified for versus which remain directly state-enforced.
Permit types & fees
Residential Building Permit (New Construction)
Required for new single-family and duplex construction within Missoula city limits. Reviewed against the 2021 IRC/IBC and 2021 IECC as amended by the State of Montana Building Codes Bureau, adopted locally via Missoula Municipal Code 15.04.010. Applications are submitted online through the Accela Citizen Access portal.
Residential Addition / Remodel / Alteration Permit
Required for room additions, structural alterations, and remodels affecting structural, mechanical, electrical, or plumbing systems on existing single-family and duplex dwellings within Missoula city limits.
Residential Electrical Permit
Required for electrical installations, service upgrades, and rewiring in single-family, duplex, and multi-family dwellings within Missoula city limits. Governed by the 2020 NEC as amended by the State of Montana. Montana homeowners may self-perform electrical work on their own residence under a State Homeowner's Electrical Permit.
Residential Plumbing Permit
Required for plumbing installations, alterations, and repairs in Missoula residential properties, including water heater replacement. Governed by the 2021 Uniform Plumbing Code as amended by the State of Montana. A statewide homeowner exemption under MCA 50-60-506(4) allows an owner-occupant to do their own plumbing work without a license.
Residential Mechanical / HVAC Permit
Required for heating, ventilation, air conditioning, and fuel-gas installations in Missoula residential properties. Covers furnaces, heaters, boilers, air handlers, evaporative coolers, ventilation, wood stoves, and gas piping. Governed by the 2021 International Mechanical Code and 2021 International Fuel Gas Code as amended by the State of Montana.
Residential Re-Roof Permit
Required for residential or commercial roofing replacement or re-cover within Missoula city limits. A flat permit fee applies rather than valuation-based calculation.
Solar Photovoltaic (PV) Permit
Required for rooftop or ground-mount solar PV installations on residential properties within Missoula city limits. An electrical permit is mandatory for all solar systems, billed at the same flat 'Solar Installation permit' fee. Apply through Accela Citizen Access, describing the project as a rooftop or ground-mount solar installation.
Accessory Dwelling Unit (ADU) Permit
Required for construction of a new accessory dwelling unit (detached, internal, or internal addition) on a residential parcel within Missoula city limits. Governed by Missoula Municipal Code Title 20 (Zoning), Section 20.45.060, as amended by Ordinance 3669 (October 2020), which removed the prior owner-occupancy and additional-parking requirements. A building permit is required in addition to zoning compliance review.
New residential construction activity
New privately-owned residential construction onlyHousing units authorized by building permits for new privately-owned residential construction — this is not total permit volume (no commercial permits or remodels).
- Latest month (2026-05)
- 160units
19 buildings · $30.9M valuation
- Trailing 12 months
- 594units
11 of 12 months reported · #2 in Montana coverage by units
- Year to date (2026 YTD through 2026-05)
- 261units
58 buildings · $57.1M valuation
5 month(s) reported to Census
- Full year 2025
- 556units
165 buildings · $125.2M valuation
Source: U.S. Census Bureau, Building Permits Survey (BPS), 2026-05 vintage. Census survey data — separate from the permit-requirements verification above. All Montana building activity
Tips & gotchas
- Missoula has TWO separate building departments covering Missoula County: the City of Missoula Development Services Building Division (435 Ryman St., (406) 552-6630) handles everything INSIDE city limits; the Missoula County Building Division (6089 Training Drive, (406) 258-3701) handles everything in unincorporated county OUTSIDE city limits. Confirm which jurisdiction your parcel is in before applying — this file (slug: missoula) covers the CITY only.
- Montana runs a state-preemptive building code model: the Montana Building Codes Bureau (Dept. of Labor & Industry, Business Standards Division) adopts a single uniform statewide code under MCA Title 50, Chapter 60 and ARM Title 24, Chapter 301. Missoula adopts the state's code editions by reference (MMC 15.04.010) rather than writing its own amendments — do not expect city-specific climate/snow-load tables the way some other states' cities publish.
- All City of Missoula permit applications are submitted online through Accela Citizen Access at aca-prod.accela.com/MISSOULA — there is no walk-in paper-only application path described on the City's site.
- For 1-2 family dwellings, mechanical, electrical, and plumbing scopes bundled into a building permit are field-verified at inspection rather than separately plan-reviewed.
- Rough mechanical, electrical, and plumbing inspections must all pass BEFORE a framing inspection can be scheduled on new residential construction.
- Plan Review Fee is a flat 30% of the Building Permit Fee across all valuation-based permit types.
- Current fees were adopted by Missoula City Council Resolution 8887 (August 18, 2025), effective January 1 – December 31, 2026 (labeled 'FY26' in City documents).
- Montana provides statewide homeowner self-permitting exemptions: plumbing work is exempt from licensing (not permitting) under MCA 50-60-506(4) for an owner-occupant's primary residence; electrical work requires a State Homeowner's Electrical Permit but no electrician's license.
- Building permits requiring plan review typically take 8-12 weeks; those not requiring plan review (most trade-only permits) typically take 2-3 business days.
- ADUs in Missoula no longer require owner-occupancy or extra parking as of Ordinance 3669 (2020) — a change from many other Montana/Mountain West cities that still require owner-occupancy.
- Sheds under 200 sq ft and free-standing decks (30 inches or less high, under 200 sq ft, no roof, not used as egress) do NOT require a building permit; anything exceeding those thresholds does.