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Residential Addition / Alteration Permit in Bozeman, Montana

Required for adding new square footage to, or remodeling without adding square footage to, an existing residential structure in Bozeman. Reviewed under the 2021 IRC.

Verified 2026-07-02 · Source

When you need this permit

  • Residential Addition: adding new square footage to an existing residential structure
  • Residential Alteration (Remodel): remodeling an existing residential structure without adding new square footage
  • Water Service Fixture Count form required if adding or removing water fixtures
  • Sump Drain Policy and Site Drainage Self Certification required for additions
  • Truss/structural calculations and spec sheets required as applicable to scope
  • Some remodel work is exempt from permitting — see the city's 'IRC Work Exempt from Permits' guide before applying

Required documents

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Fee schedule

Building Permit Fee (formula-based, additions)Bozeman Municipal Code Sec. 10.02.020, as amended by Ordinance 2143 (2023)
Same Table A / hourly-rate formula as new residential construction, applied to the added square footage
Plan Revision Fee — Residential (IRC)City of Bozeman Building Permit Checklists, Forms, and Guides page (Revisions to Approved Plans section); additional plan check/permit fees may apply if project valuation increases due to the revision
$125.00

Review timeline

Plan reviewTypical estimate — confirm current times with the Bozeman building department
~5–10 business days

How long did your Residential Addition / Alteration Permit permit actually take in Bozeman?

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Inspection process

  1. 1

    Framing

    Required if structural work is part of the addition/remodel scope

  2. 2

    Final

    All work complete per approved plans

See the full Bozeman inspection guide — scheduling & re-inspection fees →

Tips

  • Check the 'IRC Work Exempt from Permits' guide first — some remodel work does not require a permit at all.
  • If you are only remodeling (no new square footage), you do not need the Landscape & Irrigation Self-Certification Form required for new construction/additions.
  • Revising an already-approved and stamped plan set costs $125 for residential (IRC) projects and requires emailing building@bozemanmt.gov with the permit number, project address, and description of changes.

Frequently asked questions

Bozeman requires a residential addition / alteration permit for: Residential Addition: adding new square footage to an existing residential structure; Residential Alteration (Remodel): remodeling an existing residential structure without adding new square footage; Water Service Fixture Count form required if adding or removing water fixtures; Sump Drain Policy and Site Drainage Self Certification required for additions; Truss/structural calculations and spec sheets required as applicable to scope; Some remodel work is exempt from permitting — see the city's 'IRC Work Exempt from Permits' guide before applying. If your project isn't listed, confirm with City of Bozeman — Community Development, Building Division at (406) 582-2375 ext. 1 before starting work.

$125.00 for residential (IRC) plan revisions, per the City of Bozeman Building Permit Checklists, Forms, and Guides page. If the revision increases the project's valuation, additional plan check and permit fees may apply.

Plan review for a residential addition / alteration permit in Bozeman typically runs 5–10 business days. This is an estimate, not a published figure — confirm current review times with City of Bozeman — Community Development, Building Division at (406) 582-2375 ext. 1.

You'll need: Sump Drain Policy acknowledgment (PDF); Site Drainage Self Certification Form (PDF). Depending on your project, Bozeman may also ask for: Water Service Fixture Count (PDF); Truss/Structural Calculations; IRC Work Exempt from Permits (PDF). See the required-documents checklist on this page for details on each.

Bozeman requires 2 inspection(s) for a residential addition / alteration permit, in order: Framing, Final. Schedule each through City of Bozeman — Community Development, Building Division ((406) 582-2375 ext. 1).

Apply through City of Bozeman — Community Development, Building Division at 20 East Olive Street, Bozeman, MT 59715 (Professional Building front counter); mailing/administration at 121 N Rouse Ave, Bozeman, MT 59715. Phone: (406) 582-2375 ext. 1, email: building@bozemanmt.gov. Office hours: Professional Building front counter (20 East Olive St.): Mon, Wed, Fri 9am-4pm; Tue, Thu 9am-1pm. Plans Examiner appointments (commercial or residential) bookable via Vagaro, 30-minute slots daily.. Official information: https://www.bozemanmt.gov/departments/community-development/building.

Bozeman, Montana has adopted: 2021 International Residential Code (IRC) — State of Montana adopted code, ARM 24.301.154 (chapters 11-14 and 16-43 deleted by ARM amendment); Appendix Q (Tiny Houses) adopted; 2021 International Building Code (IBC) — State of Montana adopted code, ARM 24.301.146; 2021 International Mechanical Code (IMC) — ARM 24.301.172; 2021 International Fuel Gas Code (IFGC) — ARM 24.301.173; 2021 International Energy Conservation Code (IECC) — ARM 24.301.161; Appendix RB (Solar Ready Provisions) adopted; 2020 National Electrical Code (NEC) — ARM 24.301.401; 2021 Uniform Plumbing Code (UPC, IAPMO) — ARM 24.301.301; 2021 International Existing Building Code (IEBC) — ARM 24.301.171 (commercial); 2021 International Swimming Pool and Spa Code — ARM 24.301.175 (commercial); 2021 International Fire Code — ARM 23.12.601, Admin Order 2023-04; ICC A117.1-2017 Standard for Accessible and Usable Buildings and Facilities — ARM Subchapter 24.301.9 (commercial); NOTE: Montana plans to adopt the 2024 ICC family of codes statewide in mid-2026; the City of Bozeman's Building Division states designs must comply with the code cycle in effect at time of permit application submission and will publish updates when the new cycle takes effect.. Local amendments apply — see the Bozeman overview page for the full list.

Sources & verification

Verified against official sources. Last reviewed 2026-07-02.

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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Residential Addition / Alteration Permit in other cities

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