Great Falls, Montana Building Permits
Explore Great Falls, Montana building permits, costs, review timelines, zoning, inspections, adopted codes, and climate design factors for construction.
Wind
ASCE 7 basic wind speed: typically 115 mph ultimate design wind speed for Risk Category II buildings; Great Falls' open plains exposure can increase wind pressures, so exposure category and site conditions should be verified.
Snow Load
Ground snow load: commonly about 30 psf in the Great Falls area, but local design criteria, elevation, drifting, exposure, and the adopted code should be confirmed for each site.
Flood
FEMA floodplain issues are most common near the Missouri River, Sun River, and associated drainage corridors. Construction in mapped FEMA Special Flood Hazard Areas may require floodplain development review, elevation certificates, flood-resistant materials, and compliance with base flood elevation requirements.
Earthquake
Seismic design category: commonly SDC C for many Great Falls-area sites, subject to soil class, occupancy, and mapped ASCE 7 spectral values. Project-specific seismic criteria should be confirmed during design.
Wildfire
Great Falls has grassland and wildland-urban-interface exposure at the edges of the city and in nearby rural/open-range areas. Fire access, driveway clearances, hydrant or water supply, address identification, and defensible space may be important, particularly for edge-of-city development and large accessory structures.
Building Department
City of Great Falls Planning and Community Development Department - Building Division
Approval Timeline
Small residential trade permits and straightforward minor work may be issued in a few business days. Residential additions, detached garages, decks, basement finishes, and new homes commonly take 1-3 weeks depending on completeness. Commercial tenant improvements and new commercial buildings often take 3-6 weeks, with longer review periods for fire alarm/sprinkler work, accessibility issues, change of occupancy, civil/site review, floodplain review, or plan corrections.
Common Requirements
Typical permit applications include owner and contractor information, construction valuation, a site plan showing lot lines and setbacks, building plans, floor plans, elevations, foundation and framing details, wall sections, energy code information, truss drawings if used, and separate trade permits for mechanical, electrical, and plumbing work. Commercial projects generally require stamped plans when applicable, a code analysis, occupancy and construction type, egress and accessibility plans, fire-resistance details, special inspection information, and coordination with fire protection systems.
Zoning Information
Great Falls zoning regulations establish permitted uses, setbacks, lot coverage, height limits, parking, landscaping, signage, and standards for residential, commercial, industrial, and mixed-use areas. Zoning review is typically part of the building permit process. Projects near the Missouri River, Sun River, drainage channels, or mapped floodplains may need additional floodplain and site review. Change-of-use projects should confirm zoning compliance before lease signing or construction.
Permit Costs
Great Falls permit fees are generally based on project valuation, with separate plan review, state surcharge, and trade permit fees. Very small permits may be around $50-$200. Decks, garages, basement finishes, and residential remodels often cost several hundred dollars to over $1,000 depending on value. New houses and commercial projects commonly range from $1,000 to several thousand dollars or more when plan review, fire protection, utility, and inspection-related fees are included.
Engineering Requirements
Engineer-stamped plans are typically required for commercial buildings, structural alterations, non-prescriptive residential construction, retaining walls above code thresholds, complex foundations, long-span beams, steel or concrete structural systems, high snow or wind loads, special inspection items, and repairs involving structural damage. Trusses require engineered truss drawings. The city may also request geotechnical or structural engineering for river-adjacent sites, unusual soils, foundation problems, or substantial remodels.
Local Code Adoption
Great Falls enforces Montana-adopted construction codes, generally based on the 2021 International Building Code and 2021 International Residential Code with Montana amendments, plus adopted mechanical, plumbing, electrical, energy, fire, and accessibility standards. Applicants should verify current code adoption with the City of Great Falls Building Division.
Typical Projects
Common Great Falls permit projects include single-family homes, basement finishes, detached garages and shops, decks, roof and siding repairs, commercial tenant improvements, medical and office remodels, restaurant work, industrial and warehouse projects, signs, accessibility upgrades, and repairs related to wind, hail, freeze-thaw, snow, or foundation movement.