Mechanical / HVAC Permit in Anaconda-Deer Lodge, Montana
VerifiedRequired for heating, ventilation, air conditioning, and fuel-gas installations in Anaconda-Deer Lodge. Mechanical is NOT locally certified in Anaconda-Deer Lodge — it is issued and inspected DIRECTLY by the Montana Department of Labor & Industry, Building Codes Bureau, under the 2021 International Mechanical Code (IMC) and 2021 International Fuel Gas Code (IFGC), both effective June 11, 2022.
Verified 2026-07-02 · Source
When you need this permit
- A state mechanical permit is required for heating, ventilating, air-conditioning, restaurant kitchen hoods, and other mechanical systems on buildings to which state building permits are applicable and located outside cities/counties certified to issue their own mechanical permits — Deer Lodge County is not certified for mechanical
- Exemptions: farm and ranch buildings, mining buildings on mining property, petroleum refineries and pulp/paper mills (except offices/shops), residential buildings containing fewer than five dwelling units (except when serving transient guests), and private garages/storage buildings for the owner's own use
- Application for Mechanical Permit (BCP-1) submitted to the Building Codes Bureau with applicable fee(s), or applied for online at aca-prod.accela.com/bcb
- Mechanical permit holders must call for gas piping pressure tests, rough-in, and final inspections, giving 48 hours' notice before covering up work
- All work must meet the International Mechanical Code and International Fuel Gas Code as adopted by Montana
Required documents
- Required
Application for Mechanical Permit
Montana Building Codes Bureau form BCP-1 (Rev. 11/25); valuation-based fee schedule with a worked fee-calculation example printed on the form
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Mechanical Permit — project value $0 to $10,000 | $48 for the first $1,000 plus $14 for each additional $1,000 or fraction thereof | Montana Building Codes Bureau, Application for Mechanical Permit, BCP-1 (Rev. 11/25). Worked example on the form: a $9,460 project = $48 + 9 x $14 = $174 total. |
| Mechanical Permit — project value $10,001 to $50,000 | $166 for the first $10,000 plus $9 for each additional $1,000 or fraction thereof | BCP-1 (Rev. 11/25) |
| Mechanical Permit — project value $50,001 or more | $514 for the first $50,000 plus $6 for each additional $1,000 or fraction thereof | BCP-1 (Rev. 11/25) |
Review timeline
~0–0 business days
Typical estimate — confirm current times with the Anaconda-Deer Lodge building department
Inspection process
- 1
Gas Piping Pressure Test
Required before concealing gas piping; 48 hours' notice required
- 2
Rough-In
Ductwork and mechanical equipment rough-in before walls closed
- 3
Final
Equipment operational, combustion air and venting verified
Tips
- Anaconda-Deer Lodge is NOT on Montana's certified-jurisdiction list for mechanical — every mechanical/HVAC permit there is a STATE permit issued by the Building Codes Bureau, not the county Building Inspector.
- Residential buildings with fewer than five dwelling units are exempt from the state mechanical permit requirement (except when serving transient guests) — confirm applicability of this exemption to your specific project with the Building Codes Bureau at (406) 841-2056.
- Apply online at https://aca-prod.accela.com/bcb/ or mail the paper application with payment to: Department of Labor & Industry, Building Codes Bureau, PO Box 200517, Helena, MT 59620-0517.
Frequently asked questions
- Do I need a permit to replace my furnace or A/C in Anaconda-Deer Lodge?
- Generally, single-family and duplex residential buildings (fewer than five dwelling units) are exempt from the Montana state mechanical permit requirement, per the Building Codes Bureau's published exemptions. Larger residential, commercial, and other non-exempt mechanical work requires a State Mechanical Permit, since Deer Lodge County is not a certified jurisdiction for mechanical permitting. Confirm exemption applicability with the Building Codes Bureau at (406) 841-2056.
- Who issues mechanical/HVAC permits in Anaconda-Deer Lodge?
- The State of Montana Building Codes Bureau, not the county. The ADLC Building Inspector's webpage confirms mechanical permitting and inspection are functions of the Montana Department of Labor and Industry.
Sources & verification
Verified against official sources. Last reviewed 2026-07-02.
- Anaconda-Deer Lodge County Planning Department — Building Inspector (local Building-only program); Montana Department of Labor & Industry, Building Codes Bureau (state — electrical, plumbing, mechanical) — official building department
- Montana Building Codes Bureau — Mechanical Permits
- Application for Mechanical Permit (BCP-1, Rev. 11/25, PDF)
- ADLC Building Inspector (confirms mechanical is a state, not county, function)
- Montana Building Codes Bureau — Current Codes (2021 IMC/IFGC adoption)
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 Anaconda-Deer Lodge building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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