Gallatin County is the second-most populous county in Montana at about 129,000 residents, and added about 9,800 residents between 2020 and 2025, second only to Flathead County. It is home to Bozeman, the county seat, and Montana State University. The county itself does not issue building permits: Bozeman, Belgrade and Manhattan run state-certified programs inside their limits, West Yellowstone’s covers residential building, and elsewhere the state Building Codes Program is the authority. The county Planning Department issues land use permits in its zoning districts.
This guide covers who issues building permits in Gallatin County, the uniform Montana code, snow and seismic design near Yellowstone, and how contractor and trade licensing work.
This guide covers unincorporated Gallatin County. Bozeman, Belgrade and Manhattan run their own certified programs, West Yellowstone’s covers residential building, and Three Forks is covered by the state.
Gallatin County does not issue building permits. Outside Bozeman, Belgrade and Manhattan (and residential building in West Yellowstone) the state Building Codes Program in Helena is the authority, and the state code does not reach houses of fewer than five units, farm and ranch buildings or private garages there. A county land use permit is still required for work in any of the county’s zoning districts, and outside certified cities snow loads come from the ASCE 7 Hazard Tool, with a 30 psf minimum roof snow load.
What requires a building permit in Gallatin County?
Permit required
- Outside certified cities: new commercial buildings and buildings of five or more dwelling units, and their additions, alterations, moves and changes of occupancy
- New residential construction within a certified jurisdiction that enforces the residential code
- Inside certified cities: structural work, retaining walls more than 4 feet high, re-roofing, pools 24 inches deep or more, larger decks and demolition
- Electrical work under the adopted National Electrical Code, including services, circuits, solar and EV charging
- Plumbing under the Uniform Plumbing Code (outside certified cities a state plumbing permit, unless a homeowner does the work on their own home), and mechanical work (outside certified cities only on buildings that need a state building permit)
Often exempt or no permit
- Houses and residential buildings of fewer than five units (not serving transient guests), where no local program has adopted the code for them
- Farm and ranch buildings of any size, and private garages and storage buildings for the owner’s own use, unless the local government has adopted the code for them
- Outside certified cities, other work the state confirms is exempt when asked
- Painting, papering, tiling, carpeting, cabinets, countertops and similar finish work, and ordinary repairs that do not cut into walls or structure or change piping or wiring
Short on time to read all of this?
Get a free quote →Which authority applies — certified program or the state program
Where a city or county holds a certified building-code program, that jurisdiction is the authority having jurisdiction and issues the permit. Everywhere else — the state’s vast non-certified areas — the Montana Building Codes Program in Helena is the authority, and it enforces primarily commercial and other covered buildings. Gallatin County has no certified program: Bozeman, Belgrade and Manhattan are certified, West Yellowstone is certified for residential building, and the state is the authority everywhere else in the county.
Montana adopts one building code, based on the 2024 International Codes from 26 September 2026; a certified local program or the state Building Codes Program enforces it, and the state code does not reach houses of fewer than five units, farm and ranch buildings or private garages unless a local government has made it apply to them. How Montana’s statewide code works
Who handles permitting in Gallatin County?
Gallatin County does not issue building permits. In unincorporated areas the state Building Codes Program is the building authority and the county Planning Department issues land use permits in its zoning districts; Bozeman, Belgrade and Manhattan run their own certified programs.
| Detail | Information |
|---|---|
| Building permits | Montana DLI Building Codes Program, 2705 Skyway Drive, Helena; 406-841-2056 (the county issues none) |
| Seat | Bozeman |
| Serves | Unincorporated Gallatin County |
| Certified cities | Bozeman, Belgrade and Manhattan; West Yellowstone for residential building |
| Code | Montana state code, amended by ARM Title 24 Ch. 301; the state moved to the 2024 I-Codes and 2023 NEC on 26 September 2026 |
| Design loads | Outside certified cities, snow loads from the ASCE 7 Hazard Tool (30 psf minimum roof snow load) |
| Contractor credentials | State construction contractor licence (or ICEC where exempt); electrical and plumbing state-licensed |
| County role | Planning Department land use permits in zoning districts (County Courthouse, Room 108) |
Not sure this scope needs a permit?
Get a free quote →Gallatin County has no building program, so outside the certified cities the state Building Codes Program reviews, permits and inspects the buildings the state code covers, chiefly commercial buildings and residential buildings of five or more units. Houses of fewer than five units in unincorporated areas need no state building permit, but a county land use permit in a zoning district, septic and floodplain approvals, and state electrical permits still apply.
Snow and seismic loads set the structural design across the county; moderate-to-severe loads pull a Montana-licensed design professional into the project.
Permit types
Residential permits
In unincorporated Gallatin County, houses and residential buildings of fewer than five units need no state building permit, though a county land use permit applies in a zoning district and electrical work still needs a state electrical permit. Contractors need a state construction contractor licence unless exempt, and owners may do their own electrical and plumbing work on their own home.
Commercial permits
Commercial work in unincorporated areas is reviewed, permitted and inspected by the state Building Codes Program under the uniform Montana code. Moderate-to-severe snow or seismic loads require engineered drawings from a Montana-licensed design professional.
Construction contractors need a Department of Labor and Industry licence, with exemptions for casual work under $2,500, owners working on their own property and independent contractors with no employees; electricians and plumbers hold state trade licences, though owners may do their own electrical and plumbing at home. Contractor licensing in Montana
Gallatin County permit costs and fees
Budget the state building permit and plan-review fees, separate trade permits, any county land use permit fee and any design-professional drawings.
| Fee component | How it works |
|---|---|
| Building permit | Based on project valuation; set by the certified jurisdiction or the state schedule |
| Plan review | 35 percent of the building permit fee on state permits; certified programs set their own |
| Trade permits | Separate electrical, plumbing and mechanical fees |
| Design professional | Engineer or architect fees where snow, seismic or design triggers it |
| Zoning and floodplain | Local land-use, zoning or floodplain review where it applies |
| Extra inspections | The state charges $75 an hour for requested inspections; certified cities set their own fees |
Rather talk it over?
Call 1-855-478-4290 →Need a real number for a specific Gallatin County project? Send us the scope, address and valuation and we will identify the authority having jurisdiction, the reviews it will trigger and the fee categories that will apply.
Where the state issues the permit, the fee follows a valuation table and plan review is 35 percent of the permit fee; a certified local program sets its own schedule. Montana’s state permit rules
Trade permits and who may pull them
Permit required
- Service installations, panel upgrades, new circuits, solar PV and EV chargers
- New plumbing, repipes, water heaters, fixtures and backflow devices (outside certified cities, a state plumbing permit)
- Heating, air conditioning, ventilation, gas piping and kitchen hoods (outside certified cities, a state mechanical permit only on buildings that need a state building permit)
- Fire sprinkler and other fire-extinguishing systems on commercial and multi-family buildings
Typically exempt
- Plugging an appliance into an existing approved outlet, and low-voltage signal, communications and fibre-optic wiring
- Outside certified cities, plumbing a homeowner does on their own home, if it is not built to sell or rent
- Outside certified cities, mechanical work on houses of fewer than five units, farm and ranch buildings, and private garages and storage buildings
- Inside certified cities, clearing stoppages and replacing minor parts that do not alter the equipment’s approval
Electricians and plumbers are licensed by state boards, though an owner may do electrical work on their own home and plumbing on their own single-family home. Where the state covers the area, an electrical permit is needed for any installation or repair, and where a building permit is needed, only after it is issued. Electrical permits in Montana
Rather not deal with the Gallatin County building department?
Get a free quote →How to apply for a Gallatin County building permit
The state for unincorporated areas; Bozeman, Belgrade or Manhattan inside those cities.
Outside the certified cities the state code does not reach houses of fewer than five units; commercial work needs a state permit.
Outside certified cities, snow loads come from the ASCE 7 Hazard Tool, with a 30 psf minimum.
Contractors hold a state construction contractor licence (or an ICEC where exempt); electrical and plumbing are state-licensed.
Moderate-to-severe snow or seismic loads trigger engineered drawings.
Get any county land use permit, then file with the state or the certified city.
Where the state issues the permit, plan review averages about three weeks, and the building permit must be issued before any trade permit. Montana’s state permit rules
Inspections in Gallatin County
Where a permit is required, standard checkpoints include footing and foundation, framing, rough-in electrical, plumbing and mechanical, insulation and energy, fire systems on commercial work, and final, with occupancy approval before use. In unincorporated Gallatin County the state program inspects the work it permits.
Field inspection staff for the state program are positioned around Montana to cover non-certified areas; certified jurisdictions run their own inspectors. Confirm which authority inspects your project and give the notice it asks for.
Do not cover work before the required inspection has been approved. Keep the issued permit, the approved plans, the snow-load and seismic documentation, product listings and your correction responses available on site.
Gallatin County permit search and official resources
Permit records in Montana sit with the authority that issued them — a certified jurisdiction holds its own, while the state Building Codes Program provides records of permits it issued in non-certified areas through a public records request. For unincorporated Gallatin County those records sit with the state; Bozeman, Belgrade and Manhattan hold their own. If you are buying, refinancing or renovating, confirm that past work was permitted rather than assuming it was.
Want this handled start to finish?
Get a free quote →Confirm the authority having jurisdiction first. Montana’s certified-versus-state split means the answer — and whether a permit was even required — varies by parcel. The code text is uniform statewide; the administering authority, the fee schedule and the land-use requirements are not. Confirm current requirements, fees and review turnaround for your filing date.
These are the primary sources behind this guide. Codes, fee schedules and portal procedures change — confirm the position for your filing date.
- Gallatin County — who issues building and land use permits
- Montana Building Codes Program (DLI)
- Administrative Rules of Montana, Title 24 Ch. 301
- Montana DLI Construction Contractor License Program
- Montana state permit portal (EBIZ)
Frequently asked questions
Where do I get a Gallatin County building permit?
Not from the county: Gallatin County does not issue building permits. Outside Bozeman, Belgrade and Manhattan (and residential building in West Yellowstone) the state Building Codes Program issues them; the county issues land use permits in its zoning districts.
Does Gallatin County have a building department?
No. The county has no state-certified building program, so the state is the building authority in unincorporated areas; the county Planning Department handles zoning and land use permits.
Is the code different from the state’s?
No. Montana has one statewide code, and a city or county may not adopt a more stringent one, apart from voluntary, incentive-based energy conservation standards.
Inspections are where schedules slip.
Get a free quote →Does Montana license general contractors?
Yes. Since January 1, 2026, construction contractors need a Construction Contractor License from the Department of Labor and Industry, which replaced the former registration. The state’s FAQ lists an online application and a $70 fee, with no exam, and exemptions apply: an independent contractor with no employees instead needs an Independent Contractor Exemption Certificate (ICEC) or workers’ compensation coverage. Electricians and plumbers are separately licensed by state boards. Confirm current requirements with Montana DLI.
When is an engineer required?
When a building carries moderate-to-severe snow or seismic loads, or does not meet conventional light-frame provisions, a Montana-licensed design professional is generally required.
How do I run a Gallatin County permit search?
For unincorporated areas, ask the state Building Codes Program, which holds the records of permits it issued; Bozeman, Belgrade and Manhattan hold their own.
Simplify Gallatin County permitting with Alliance Permitting
Gallatin County issues no building permits itself, so the first questions are whether a parcel is inside a certified city, whether the state code reaches the building, and what snow and seismic design it needs. Getting those right keeps a Gallatin Valley project moving.
Trusted by leading builders, developers, and national contractors — 21+ years of filing in the jurisdictions we write about.
Contractors and builders choose Alliance for Gallatin County because the work is done by people who have stood at the counter:
- We confirm whether the parcel sits inside a certified city.
- We confirm the scope that needs a permit.
- We pull snow and seismic design values and flag engineered drawings.
- We confirm the state contractor licence (or ICEC) and state trade licences.
- We assemble the plan set for the state or the city and track the review.
Alliance Permitting is a permit documentation and submission company in Montana. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.
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Let Alliance prepare, file, and track your Gallatin County permits while your crew stays on the job.
More Montana permitting guides
This guide is provided by Alliance Permitting for general information about Gallatin County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.