Helena building permits

Building department

Address

316 N. Park Avenue, Room 435, Helena, MT 59623

Phone

(406) 447-8438

Email

CityBuilding@helenamt.gov

Office hours

City County Building, 316 N Park Ave, Helena, MT 59623; applications and permits also processed online via Civic Access (helenamt.gov/business/civic-access/)

Website

Official site

Permit portal

Apply online at Helena's portal

Inspection guide

See how inspections work in Helena — sequence, scheduling & re-inspection fees.

Codes adopted

Montana adopts a single statewide building code by rule and, by default, enforces it directly — local governments only gain enforcement authority once the state certifies them. Under the Montana Building Codes Act (Mont. Code Ann. Title 50, Chapter 60), the Department of Labor & Industry's Building Codes Bureau adopts one state building code applicable everywhere (§ 50-60-203, codified further at Administrative Rules of Montana Title 24, Chapter 301) — currently the 2021 editions of the IBC, IRC, IMC, IFGC, IECC, IEBC, ISPSC, and UPC, with the 2020 NEC for electrical (effective statewide since 6/11/2022 per the Bureau's own Current Codes page). A city, county, or town may adopt and enforce its own building-code program under § 50-60-301, but its adopted code "may include only codes adopted by the Building Codes Bureau" — a local edition can never diverge from or be less stringent than the state's. Critically, under § 50-60-302, a local government cannot enforce ANY building code — even one it has formally adopted — until the Bureau certifies its program (requiring an approved code, a published fee schedule, an enforcement plan, and properly licensed or nationally certified inspectors); certification is granted per TRADE, not as one blanket designation. The Bureau's own "Certified City, County and Town Programs" list uses the key B=Building, P=Plumbing, E=Electrical, M=Mechanical, SP=Pool, W=Wildland-Urban-Interface — a jurisdiction can be certified for Building only while Electrical/Plumbing/Mechanical remain directly state-enforced within the same city limits (e.g., Havre, Anaconda-Deer Lodge), or certified across all trades (e.g., Billings, Missoula, Great Falls, Bozeman, Helena, Kalispell). Non-certified jurisdictions — most of Montana's unincorporated county land, since very few counties appear on the certified list — fall under direct enforcement by the state Building Codes Bureau (§ 50-60-304). Montana also exempts private homes and buildings of four or fewer dwelling units not serving transient guests from the state building-permit requirement entirely, though electrical, plumbing, and mechanical permits remain separately required regardless. Always confirm with the specific jurisdiction which trades it is certified for versus which remain directly state-enforced.

• 2021 International Building Code (IBC) — Montana statewide adoption, effective June 11, 2022; enforced by the City of Helena within city limits under its DLI-certified Building Code Enforcement Program
• 2021 International Residential Code (IRC), for One- and Two-Family Dwellings — Montana statewide adoption, effective June 11, 2022; City of Helena Building Division is the local Authority Having Jurisdiction (AHJ) for one- and two-family dwellings under IRC Chapters 8 and 9, including roofing/re-roofing
• 2021 International Existing Building Code (IEBC) — Montana statewide adoption, effective June 11, 2022
• ICC A117.1-2017 (Accessibility) — Montana statewide adoption, effective June 11, 2022
• 2021 Uniform Plumbing Code (UPC) — Montana statewide adoption, effective June 11, 2022; City of Helena is certified to enforce plumbing (P) within city limits
• 2021 International Mechanical Code (IMC) — Montana statewide adoption, effective June 11, 2022; City of Helena is certified to enforce mechanical (M) within city limits
• 2021 International Fuel Gas Code (IFGC) — Montana statewide adoption, effective June 11, 2022
• 2020 National Electrical Code (NEC) — Montana statewide adoption, effective June 11, 2022 (Technical Advisory NEC_TIA-23-3_210.8 issued August 12, 2022); City of Helena is certified to enforce electrical (E) within city limits
• 2021 International Energy Conservation Code (IECC) — Montana statewide adoption, effective June 11, 2022
• 2021 International Swimming Pool and Spa Code (ISPSC) — Montana statewide adoption, effective June 11, 2022
• 2021 Wildland Urban Interface (WUI) Code — Montana statewide adoption, effective June 11, 2022 (Helena is NOT listed as WUI-certified; WUI enforcement in Helena's jurisdiction area is not confirmed — see notes)
• Statewide code administered by the Montana Department of Labor & Industry (DLI), Business Standards Division, Building Codes Program (formerly/also referenced as the Building Codes Bureau) — Mont. Code Ann. Title 50, Chapter 60, Parts 1-4

Permit types & fees

• Residential Building Permit (One- and Two-Family Dwelling — New Construction)

  Required for construction of new single-family and two-family (duplex) dwellings within Helena city limits. Reviewed against the 2021 International Residential Code (IRC) as adopted statewide by Montana and enforced locally by the City of Helena Building Division, a DLI-certified building code enforcement program.

  →

• Residential Addition / Remodel / Alteration Permit

  Required for additions, remodels, and structural alterations to existing one- and two-family dwellings within Helena city limits, using the same valuation-based fee schedule and 2021 IRC review standards as new construction.

  →

• Electrical Permit

  Required for any electrical installation in new construction, remodeling, or repair within Helena city limits, except as provided by MCA 50-60-602. The City of Helena is DLI-certified to enforce electrical code within city limits under the 2020 NEC as adopted statewide by Montana.

  →

• Plumbing Permit

  Required for installation, removal, alteration, or repair of plumbing, water and sewer service lines, gas lines, and drainage systems within Helena city limits. The City of Helena is DLI-certified to enforce plumbing code within city limits under the 2021 Uniform Plumbing Code (UPC) as adopted statewide by Montana.

  →

• Mechanical / HVAC Permit

  Required for any installation or alteration to heating, ventilation, air-conditioning, hood systems, boilers, wood stoves, or other miscellaneous heat-producing appliances within Helena city limits. The City of Helena is DLI-certified to enforce mechanical code within city limits under the 2021 International Mechanical Code (IMC) as adopted statewide by Montana.

  →

• Roofing Permit (Reroof)

  Required for installation of new roofing materials and replacement of roofing materials (re-roof) on one- and two-family dwellings within Helena city limits. The City of Helena Building Division is the Authority Having Jurisdiction under 2021 IRC Chapters 8 and 9; structures of three dwelling units or more and all commercial structures are instead regulated under the 2021 IBC Chapter 15.

  →

• Accessory Dwelling Unit (ADU) Permit

  Required for construction of an Accessory Dwelling Unit on a residential parcel within Helena city limits. Helena City Code Title 11 (Zoning) formally defines and permits ADUs by right in nearly all residential and mixed-use zoning districts; construction itself follows the standard City of Helena residential building permit process under the 2021 IRC/IBC.

  →

• Deck Permit

  Required for decks attached to or associated with one- and two-family dwellings within Helena city limits that do not qualify for the City's deck permit exemption. Governed by the City of Helena Deck Policy (October 2022) under the 2021 IRC.

  →

• Fence Permit

  Required only for fences exceeding 7 feet in height within Helena city limits; fences 7 feet or less do not require a building permit.

  →

• Solar Photovoltaic (PV) Permit

  Required for installation of rooftop or ground-mount solar photovoltaic systems within Helena city limits. Requires a Building Permit (structural/racking, valuation-based per the City's Building Permit Fee Tabulation) plus an Electrical Permit (wiring/interconnection) -- Helena is a Montana DLI-certified jurisdiction for Building, Plumbing, Electrical, and Mechanical permits, so both are issued locally by the City's Community Development Department, Building Division. No dedicated solar/photovoltaic fee line or checklist is published in the City's fee schedule; residential solar wiring is billed under the general 'Interior rewire only or new addition to a home' electrical fee category.

  →

• EV Charger / EVSE Permit

  Helena has no dedicated EV charger or EVSE permit and no distinct fee line item for electric vehicle charging equipment on either the Residential or Commercial Electrical Fees schedules. The City of Helena is DLI-certified to enforce electrical code within city limits, so EV charger circuit work still requires a City Electrical Permit -- a single charger circuit added to an existing home is billed under the Residential Electrical Fees schedule's flat 'Interior rewire only or new addition to a home' fee, while larger/commercial installations use the Commercial Electrical Fees valuation-based tiers.

  →

• Sign Permit

  Required to erect, install, or modify a sign within Helena city limits. Governed by Helena City Code Title 11 (Zoning), Chapter 23 'General Sign Regulations' (Sections 11-23-1 through 11-23-11), and issued by the Community Development Department, Building Division. The permit fee is based on the sign's contract dollar value (materials and labor), run through the same Ordinance 3134 valuation-based fee table used for other building permits; illuminated signs also require a separate Electrical Permit.

  →

• Fire Sprinkler & Fire Alarm System Permit

  Required prior to installing any fire and life safety protection system within Helena city limits, per the City's Fire and Life Safety Protection System Plan Review Policy (effective September 1, 2020; updated September 28, 2022), jointly administered by the Community Development Department Building Division and the Helena Fire Department Fire Marshal. Covers fire alarm systems, fire sprinkler systems (NFPA 13/13D/13R), clean-agent fire suppression systems, and commercial kitchen Type I hood extinguishing systems. Plans must be stamped by a licensed Fire Protection Engineer (FPE), and systems containing or altering 20 or more devices require independent third-party plan review before the Building Division issues the permit.

  →

• Change of Occupancy Permit

  Required whenever a building's or tenant space's use/occupancy classification changes within Helena city limits (e.g., converting a mercantile space to a restaurant or assembly use). This is distinct from Helena's standard construction Building Permit: the City's 2020 Book of Fees (Exhibit A, Community Development Fees) lists a separate 'Building permit fee for occupancy change' line item, described as 'Permit for change of occupancy,' billed on an hourly 'whichever is greater' basis rather than the Ordinance 3134 valuation table used for new construction. It does not appear as its own named category on the City's public Building Permit Types page — its existence and fee structure are documented only in the adopted Book of Fees, so treat the process details below as the best-available grounded reading of that fee schedule, and confirm current process specifics directly with the Building Division.

  →

Comparable nearby cities