Montana Building Permits — Complete Guide (2026)
Find, Apply & Track Permits in Cities and Counties Across Montana
Montana has minimal statewide permitting requirements. Cities and counties adopt codes independently. Much of rural Montana has no permit requirements. Building in wildfire zones adds specific defensible space considerations.
How building permits work in Montana
Building permit requirements and processing times in Montana vary by city and county. Use the links below to apply, check status, schedule inspections and find permit information for your location.
Learn the step-by-step permit process →Not sure where to apply?
Enter your city or address to find your permit office.
Permit costs by type — Montana
| Permit Type | Fee Range | Processing Time | Notes |
|---|---|---|---|
| Electrical | $75–$200 | 1–3 days | State licensed electrician required statewide |
| Plumbing | $70–$185 | 1–3 days | State licensed plumber required |
| HVAC / Mechanical | $75–$200 | 1–4 days | Heating system sizing critical at MT temps |
| Roofing | $100–$275 | 1–3 days | Snow load design required in most of MT |
| New Construction | $400–$1,300 | 1–5 weeks | Varies widely by location |
| Room Addition | $225–$650 | 1–4 weeks | Simple process in most Montana cities |
| Deck / Patio | $100–$300 | 1–3 weeks | Frost depth 36–48 inches |
| Pool | $125–$375 | 1–3 weeks | Short season — primarily indoor pools |
| ADU | $225–$650 | 1–4 weeks | Local rules only — no statewide law |
| Solar | $75–$200 | 1–3 days | Net metering available statewide |
Major Montana cities — apply online
Most Montana building permits are issued by cities. Click your city to access the permit portal, apply online, or check permit status.
Permit costs by county — top Montana counties
County building departments handle unincorporated areas. Click a county to access its permit portal directly.
How to get a building permit in Montana
Determine if your area has permit requirements
Many Montana counties have no local permit requirements. Cities — Billings, Missoula, Great Falls, Bozeman — have adopted codes. Check with your county planning office.
Montana contractor licensing
The Department of Labor and Industry requires state licenses for electrical and plumbing contractors statewide, even in areas with no local building codes.
Wildfire considerations
Properties in Wildland-Urban Interface (WUI) zones may have additional requirements. Check with your county fire district.
Submit application if required
City building departments handle permits where they exist. Rural areas may have no process.
Inspections
Cities have inspectors. State-licensed contractors in rural areas ensure code compliance even without local inspection.
ADU permits in Montana — what you need to know
🏠 Montana ADU-friendly status: No statewide law
Montana passed SB 382 in 2023 allowing ADUs by right in all single-family zones statewide. Bozeman and Missoula have active ADU programs driven by rapid population growth. Processing times are generally fast outside of Bozeman where demand is highest.
Find a licensed Montana contractor
Montana requires licensed professionals for most permitted work. Always verify a contractor's license before hiring — it protects you and is required for most permit types.
General Contractors
Find pre-screened general contractors for your Montana home project. Compare quotes on permitted work.
Find a Contractor →Verify MT License
Verify your contractor holds a valid Montana Department of Labor & Industry license before any permitted work begins.
Verify MT License →Electricians & Plumbers
Specialty-licensed electricians and plumbers are required for all permitted electrical and plumbing work in Montana.
Learn More →Ready to get started? Browse verified, licensed contractors serving Montana homeowners and get free quotes on your project.
🔍 Find a Contractor Near YouFrequently asked questions — Montana permits
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