Plumbing Permit (State-Administered) in Miles City, Montana
VerifiedRequired for plumbing work anywhere in Miles City and Custer County, including new water heater installation/replacement. Because Miles City holds no DLI Plumbing certification, this permit is issued directly by the Montana Department of Labor & Industry Building Codes Bureau (Helena) under the 2021 Uniform Plumbing Code, not the city.
Verified 2026-07-03 · Source
When you need this permit
- Application must be signed by the Master Plumber and include Master Plumber License Number
- Property address, county, and whether the job is located inside city limits must be indicated
- Type of Building (Single Family, Multiple Family, Commercial/Public, Accessory Building) and Type of Work (New, Alteration/Addition) must be indicated
- Sewer Service Type (Public Sewer System or Septic System) and Potable Water Source must be indicated
- Apply in accordance with Title 50, Chapter 60, Section 505, MCA and ARM 24.301.301 and ARM 24.301.361
Required documents
- Required
Application for Plumbing Permit
Montana Building Codes Bureau statewide form (BCP-1, Rev. 10/2019); mailed with payment to Building Codes Bureau, PO Box 200517, Helena, MT 59620-0517, or filed online via ebiz.mt.gov
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Gray water system, commercial or residential | $60 | Montana Building Codes Bureau, Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Repair or alteration of drainage or vent piping | $30 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Alteration or repair of water piping and/or treatment | $30 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each connection of building water supply to water service/public utility or private well | $20 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each connection of building drain to sewer system/public or septic | $20 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each NEW water heater (or replacement) | $25 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each storm drain and storm drainage | $30 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each lawn sprinkler, fire protection system, any meter, or backflow protection device | $30 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each hose bibb, vacuum breaker, and/or backflow device | $6 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each industrial water pre-treatment equipment including its drainage and vent | $30 | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
| Each plumbing fixture or trap (bath tub, lavatory, shower, water closet, kitchen sink, etc.) | $10 per fixture/trap | Application for Plumbing Permit (BCP-1, Rev. 10/2019), Fee Schedule |
Review timeline
1–15 business days
Miles City’s published plan-review target
Inspection process
Tips
- Review timeline governed by the Montana DLI Building Codes Bureau's own published figure for state-administered permits: 'This process may take anywhere from a few hours to several weeks depending upon the bureau's work load, the size of the project and the number of items that must be modified to address the deficiencies noted on the plan review' (Building Permit FAQ). Because Miles City holds no Plumbing certification, plumbing permits are state-administered, so this DLI turnaround governs. The 1-15 working-day range reflects 'a few hours' (same/next working day) to 'several weeks' (~3 weeks ≈ 15 working days); complex or deficient submittals can run longer. Confirm current turnaround at (406) 841-2056.
- Plumbing permits in Miles City are issued by the STATE Building Codes Bureau in Helena, not the city — mail applications and payment to PO Box 200517, Helena, MT 59620-0517, or apply online at ebiz.mt.gov.
- A straightforward water heater replacement is a flat $25 state fee.
- Master Plumber signature and license number are required fields on the application.
Frequently asked questions
- Do I need a permit to replace a water heater in Miles City?
- Yes. Water heater installation or replacement requires a state Plumbing Permit for $25, issued by the Montana Building Codes Bureau (not the city), since Miles City is not plumbing-certified. Apply by mail to PO Box 200517, Helena, MT 59620-0517, or online at ebiz.mt.gov.
- Who issues plumbing permits in Miles City?
- The Montana Department of Labor & Industry Building Codes Bureau issues plumbing permits for all of Miles City and Custer County under the 2021 Uniform Plumbing Code — the city itself is not DLI-certified for plumbing.
Sources & verification
Verified against official sources. Last reviewed 2026-07-03.
- City of Miles City Building Department — official building department
- Application for Plumbing Permit (PDF, BCP-1, Rev. 10/2019)
- Montana Building Codes Bureau — Plumbing Permits
- Montana Building Codes Bureau — Building Permit FAQ (plan-review turnaround: 'a few hours to several weeks')
- Montana Building Codes Bureau — Certified City, County and Town Programs
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 Miles City building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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