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Residential Building Permit (New Construction / Addition / Remodel) in Hamilton, Montana

Required for new single-family and two-family dwelling construction, additions, remodels, re-siding, and repairs in Hamilton. Reviewed against the 2021 IRC/IBC and related adopted codes by the Planning Department, Public Works, and the Building Official. Applications are submitted to the Building Department at 920 New York Ave.

Verified 2026-07-03 · Source

When you need this permit

  • Complete, signed permit application including legal description of the property, owner, and contractor information
  • Complete, signed site plan checklist
  • Two copies of complete construction plan sets plus one digital (PDF) copy for residential building
  • Signed and completed ResCheck (energycodes.gov/rescheck) for new construction energy compliance
  • Plan sets must be complete at submittal — the City does not accept deferred-submittal projects
  • Plans prepared by a licensed Architect or Engineer required unless the project is a single-family dwelling (2 stories + basement max), a small multi-family building (up to 4 units, 2 stories + basement max), an appurtenant garage/accessory structure, or an agricultural/ranch building
  • Detached structures (garages, ADUs) require separate permits from the primary residential permit
  • Submittals routed to Planning, Zoning, Public Works, and the Building Official for approval

Required documents

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Fee schedule

Building Permit FeeNo valuation-based residential building permit fee table was found published on the City of Hamilton website. The 2021 Planning & Public Works Fee Schedule covers only Planning/Public Works fee items (floodplain, zoning, subdivision, encroachment, site-plan-review fees) — it does NOT include a Building Division valuation fee table. Chase trail: checked the Building Department index and Permits & Applications pages, the 2023 Residential Building Permit Application (5 pages, no fee table), and the 2021 PW & Planning Fee Schedule PDF directly (extracted via curl + pypdf) — no building-valuation fee schedule located in any. Left null rather than inferring a plausible-sounding valuation table; confidence for this specific field is unverified.
Not published — contact the department

Review timeline

Plan reviewHamilton’s published plan-review target
10–10 business days

How long did your Residential Building Permit (New Construction / Addition / Remodel) permit actually take in Hamilton?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Foundation/Footing

    Before concrete pour — foundation plan, footing details, depth, embedded hardware and reinforcing steel per submitted plans

  2. 2

    Framing

    Structural framing per approved plans before walls are closed

  3. 3

    Final

    Completed work verified against approved plans; Building Official sign-off required before occupancy

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

Tips

  • Complete submittals are routed to Planning, Zoning, Public Works, and the Building Official; approvals could take up to 10 days per the Residential Building Permit Application instructions. If more information is needed, the 10-day clock restarts from the date of resubmittal.
  • Building permit fees must be paid when the permit is picked up, after approval — not at submittal.
  • Call the Building Inspection line, (406) 880-5832 (also listed as 406-552-3238 for scheduling), to schedule required inspections.
  • Detached garages and ADUs require their own separate permit from the primary residential building permit — do not assume one permit covers both.
  • The City does not accept deferred-submittal projects; plan sets must be complete when first submitted.

Frequently asked questions

Yes. Detached structures including garages and Accessory Dwelling Units (ADUs) require separate permits from the primary residential building permit. Source: City of Hamilton Residential Building Permit Application (PDF).

Complete submittals are routed to Planning, Zoning, Public Works, and the Building Official for approval, which 'could take up to 10 days.' If additional information is requested, the 10-day review period restarts from the date the requested information is resubmitted. Source: City of Hamilton Residential Building Permit Application, Instructions for Residential Building Permit Submittal.

You'll need: Residential Building Permit Application; Site Plan Checklist; Construction Drawings; ResCheck Energy Compliance Report. See the required-documents checklist on this page for details on each.

Hamilton requires 3 inspection(s) for a residential building permit (new construction / addition / remodel), in order: Foundation/Footing, Framing, Final. Schedule each through City of Hamilton Building Department ((406) 363-3316).

Apply through City of Hamilton Building Department at 920 New York Ave, Hamilton, MT 59840. Phone: (406) 363-3316, email: dpwsec@cityofhamilton.net. Office hours: City Hall: 223 S. 2nd Street, Hamilton, MT 59840, main line (406) 363-2101. Building Department / Public Works office: 920 New York Ave, (406) 363-3316 or (406) 363-6717. Building Inspector Tim Netzley: (406) 880-5832, inspector@constructmt.com. Inspection scheduling line: (406) 552-3238. Inspections scheduled Monday & Wednesday 1pm-4pm and Fridays 8am-12pm per the Roof Permit Application; 24 hours' notice required for plumbing inspections per the Plumbing Permit Application.. Official information: https://www.cityofhamilton.net/departments/building_department/index.php.

Hamilton, Montana has adopted: Montana has a mandatory statewide building code administered by the Montana Department of Labor & Industry (DLI) Building Codes Bureau, amended by the Administrative Rules of Montana (ARM) Title 24, Chapter 301. Cities, counties, and towns may become 'certified' to locally administer permitting and inspection for all or part of the code; a certified local program's adopted code 'may include only codes adopted by the Building Codes Bureau' (ARM 24.301.202). Non-certified areas fall under direct state administration by the DLI Building Codes Bureau. Source: Montana DLI Building Codes Bureau, Certified City, County and Town Programs (bsd.dli.mt.gov/_docs/building-codes-permits/certified-city.pdf, updated 04/22/2026).; Hamilton is a Montana DLI-certified jurisdiction for Building (B), Plumbing (P), Mechanical (M), Electrical (E), and Swimming Pool (SP) — full-trade certification — within Hamilton city limits. Certified program contact on file with DLI: Tim Netzley, (406) 880-5832. Source: Montana DLI Building Codes Bureau, 'Certified City, County and Town Programs' roster (bsd.dli.mt.gov/_docs/building-codes-permits/certified-city.pdf, updated 04/22/2026), row 'Hamilton — B, P, M, E, SP — Tim Netzley — 880-5832 — City Limits'. Directly verified by fetching and OCR-extracting the PDF text during this research pass (2026-07-03).; 2021 International Building Code (IBC) — adopted by City of Hamilton per the Building Department's Adopted Codes list on the Residential Building Permit Application; 2021 International Residential Code (IRC) — adopted by City of Hamilton (referenced on the permit application as '2021 International Residential Building Code'); 2021 International Existing Building Code (IEBC) — adopted by City of Hamilton; 2021 International Mechanical Code (IMC) — adopted by City of Hamilton; 2021 International Fuel Gas Code (IFGC) — adopted by City of Hamilton; 2021 International Energy Conservation Code (IECC) — adopted by City of Hamilton; 2021 Uniform Plumbing Code (UPC) — adopted by City of Hamilton (Montana uses the Uniform Plumbing Code, not the International Plumbing Code); 2020 National Electrical Code (NEC) — adopted by City of Hamilton; 2021 International Swimming Pool and Spa Code (ISPSC) — adopted by City of Hamilton; consistent with Hamilton's DLI Swimming Pool (SP) certification; 2017 ICC A117.1 Accessibility — adopted by City of Hamilton; All codes listed verbatim on the City of Hamilton 2023 Residential Building Permit Application, page 2 ('All construction shall comply with the minimum requirements of the following codes'). Source: City of Hamilton Residential Building Permit Application (PDF).. Local amendments apply — see the Hamilton overview page for the full list.

Sources & verification

Verified against official sources. Last reviewed 2026-07-03.

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 Hamilton building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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