Accessory Dwelling Unit (ADU) Permit in Bozeman, Montana
VerifiedRequired for construction of an accessory dwelling unit on a residential property in Bozeman. ADUs require both zoning/Planning review and a Building Permit, plus a unique street address.
Verified 2026-07-02 · Source
When you need this permit
- Building permit review required in addition to Planning/zoning review of ADU eligibility for the specific lot and zoning district
- ADUs (and any additional dwelling unit on a lot) require a unique address, separate from the primary address on the property — request via building@bozemanmt.gov
- For planning/zoning eligibility questions specific to a property, contact PlanningTech@bozemanmt.gov
Required documents
- Required
Building Permit Application (ProjectDox)
Submitted the same as new residential construction/addition, scoped to the ADU
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (formula-based, same as residential new construction/addition) | (Administrative Charges/Employee/Hour + Inspector's Hourly Pay Rate) x Table A factor x Building Square Footage | Bozeman Municipal Code Sec. 10.02.020, as amended by Ordinance 2143 (2023); ADUs are not billed under a separate fee category from other residential construction in the ordinance text reviewed |
Review timeline
~10–15 business days
Typical estimate — confirm current times with the Bozeman building department
Inspection process
- 1
Foundation/Framing
Same inspection sequence as new residential construction
- 2
Final
Final inspection prior to occupancy
Tips
- Request a unique address for the ADU from building@bozemanmt.gov early — this is a documented prerequisite separate from the building permit itself.
- Confirm zoning eligibility for your specific lot with the Planning Division (PlanningTech@bozemanmt.gov) before designing to a specific size or configuration, since ADU zoning standards (allowed districts, size caps) are set in Bozeman's Unified Development Code (Chapter 38) and were not independently re-verified against a live, current-dated source this session.
Frequently asked questions
- Does an ADU need its own address in Bozeman?
- Yes. The City of Bozeman requires ADUs and other additional dwelling units on a lot to have a unique address separate from the primary residence's address — request one from building@bozemanmt.gov.
Sources & verification
Verified against official sources. Last reviewed 2026-07-02.
- City of Bozeman — Community Development, Building Division — official building department
- Building Permit Checklists, Forms, and Guides | City of Bozeman (Helpful Reminders section)
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Bozeman building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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