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Codes, exemptions & field inspections

Build to the adopted code. Verify every exception.

This guide translates the available agency record into a preconstruction checklist for structural scope, minor work, and inspection release. The adopted code and the issuing official control when a field condition is disputed.

Regulatory framework

The code baseline for Silver Bow County.

Butte-Silver Bow’s official permitting presentation identifies the 2021 International Building Code, 2021 International Residential Code for one- and two-family dwellings, 2021 International Existing Building Code, 2021 Uniform Plumbing Code, 2021 International Mechanical Code, 2021 International Fuel Gas Code, 2021 International Energy Conservation Code, 2012 International Fire Code, 2021 International Swimming Pool and Spa Code, and 2021 International Wildland-Urban Interface Code; local staff are certified to review and inspect under these codes. Current state amendments apply through ARM Title 24, Chapter 301.

Inspection lane

Call the Planning and Building Department at (406) 497-6210, submit the permit application and plans through the GovWell portal or department process, await review and approval, then schedule required inspections. The official permitting presentation describes the sequence as application, review, approval, inspections, and certificate of occupancy.

Minor-work playbook

Understand what may be exempt—and what is not.

The official Butte-Silver Bow permitting presentation says permit exceptions are those listed in IBC 105.2; the reviewed presentation does not reproduce the full exception list. Permit categories include new construction, enlargement, alteration, repair, moving, demolition, change of occupancy, roofing, plumbing, mechanical, excavation, right-of-way, sewer-tap, and related work.

Field rule

A permit exemption generally addresses one narrow construction trigger. It does not automatically waive zoning, land-use, floodplain, shoreline, fire, energy, electrical, utility, septic, or right-of-way requirements. Obtain written confirmation when the project involves a new structure, structural alteration, change in occupancy, or concealed work.

Inspection pipeline

Keep the work visible at every release point.

  1. 1

    Request with lead time

    Call the Planning and Building Department at (406) 497-6210, submit the permit application and plans through the GovWell portal or department process, await review and approval, then schedule required inspections. The official permitting presentation describes the sequence as application, review, approval, inspections, and certificate of occupancy.

  2. 2

    Preserve access

    Do not cover framing, reinforcement, wiring, piping, damp-proofing, or life-safety work until the required inspection has been completed and documented.

  3. 3

    Close the record

    Retain the approved plans, inspection approvals, correction responses, and final certificate or occupancy release with the property file.

Contractor verification

Verify the builder before the contract is signed.

Use the state licensing system to verify active registration, trade credentials, bond status, and liability coverage where available. Match the legal business name to the proposal and permit application.

No verified lookup link

Planning reference

Keep the parcel rules beside the building plans.

A building permit is only one part of statutory compliance. Check the local zoning, ordinance, map, or land-use reference before finalizing setbacks, height, lot coverage, access, drainage, or accessory structure placement.

Open planning reference ↗

Source trail

Official sources for this profile

Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.

Agency websiteOpen official source ↗Permit portalOpen official source ↗Planning or zoning referenceOpen official source ↗

Project questions

Frequently asked questions for Silver Bow County

Who handles permitting for this jurisdiction?

Butte-Silver Bow Building & Code Enforcement Department, the certified county building-code authority is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.

How should I begin an application?

Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact (406) 497-6210 (Building & Code Enforcement); (406) 497-6250 (Planning).

How long might review take?

Butte-Silver Bow’s official commercial-permitting presentation reported 2022 averages of 20.7 days to first comment and 57.1 days to approval; current project timelines may vary.

How are inspections scheduled?

Call the Planning and Building Department at (406) 497-6210, submit the permit application and plans through the GovWell portal or department process, await review and approval, then schedule required inspections. The official permitting presentation describes the sequence as application, review, approval, inspections, and certificate of occupancy.

Which codes and exemptions should I review?

Butte-Silver Bow’s official permitting presentation identifies the 2021 International Building Code, 2021 International Residential Code for one- and two-family dwellings, 2021 International Existing Building Code, 2021 Uniform Plumbing Code, 2021 International Mechanical Code, 2021 International Fuel Gas Code, 2021 International Energy Conservation Code, 2012 International Fire Code, 2021 International Swimming Pool and Spa Code, and 2021 International Wildland-Urban Interface Code; local staff are certified to review and inspect under these codes. Current state amendments apply through ARM Title 24, Chapter 301. The official Butte-Silver Bow permitting presentation says permit exceptions are those listed in IBC 105.2; the reviewed presentation does not reproduce the full exception list. Permit categories include new construction, enlargement, alteration, repair, moving, demolition, change of occupancy, roofing, plumbing, mechanical, excavation, right-of-way, sewer-tap, and related work.

Field sequencing matters

The inspector needs to see the work at the right moment.

Code compliance is not only a plan-review exercise. Footings, reinforcement, framing, fireblocking, wiring, piping, insulation, weather protection, and life-safety systems each have points where the work must remain accessible. Build the inspection calendar into the trade schedule instead of treating it as a final administrative step.

When a project qualifies for a narrow minor-work exemption, keep a written explanation of why it qualifies and confirm that related zoning, utility, fire, energy, or environmental rules do not create a separate approval requirement.

Closeout file

Keep the approved plan set, inspection approvals, correction responses, contractor license verification, final certificate, and any occupancy release together. A clean record protects the owner, builder, lender, insurer, and future buyer.