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Plumbing Permit (State-Issued, incl. Water Heater) in Troy, Montana

Because Troy holds no DLI Plumbing certification, plumbing work anywhere within Troy city limits — including water heater installation/replacement — requires a Plumbing Permit issued directly by the Montana DLI Building Codes Bureau in Helena, not by the City of Troy, under the 2021 Uniform Plumbing Code.

Verified 2026-07-04 · Source

When you need this permit

  • Application must be signed by the Master Plumber and include the Master Plumber License Number, or filed as a homeowner permit for owner-performed work where allowed
  • Property address, county, and whether the job is inside city limits must be indicated
  • Type of Building and Type of Work must be indicated; sewer service type (public/septic) and potable water source must be indicated
  • Apply in accordance with Title 50, Chapter 60, Section 505, MCA and ARM 24.301.301 / 24.301.361

Required documents

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Fee schedule

Each NEW water heater (or replacement)Montana Building Codes Bureau, Application for Plumbing Permit (BCP-1) statewide Fee Schedule — same schedule applied to all non-plumbing-certified jurisdictions, including Troy
$25
Each plumbing fixture or trapApplication for Plumbing Permit (BCP-1) statewide Fee Schedule
$10 per fixture/trap

Review timeline

Plan review
Not published — contact the department

How long did your Plumbing Permit (State-Issued, incl. Water Heater) permit actually take in Troy?

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

Inspection process

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

    Tips

    • Plumbing permits for any Troy address (including a simple water heater swap) 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.

    Frequently asked questions

    Yes. Water heater installation or replacement requires a state Plumbing Permit for $25, issued by the Montana Building Codes Bureau (not the city), since Troy is not plumbing-certified.

    In Troy, the published Each NEW water heater (or replacement) is: $25. Additional published fees: Each plumbing fixture or trap — $10 per fixture/trap. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

    Troy does not publish a plan-review timeline for this permit. Contact City of Troy Building Department — Building Inspector David Jones; city-certified for Building (B), RESIDENTIAL ONLY, plus Swimming Pool (SP) permits. Commercial building permits, and Electrical, Plumbing, and Mechanical permits for ALL project types (residential and commercial), within Troy city limits are issued directly by the Montana Department of Labor & Industry Building Codes Bureau, not the City. at (406) 295-4151 for current turnaround.

    You'll need: Application for Plumbing Permit (BCP-1). See the required-documents checklist on this page for details on each.

    Apply through City of Troy Building Department — Building Inspector David Jones; city-certified for Building (B), RESIDENTIAL ONLY, plus Swimming Pool (SP) permits. Commercial building permits, and Electrical, Plumbing, and Mechanical permits for ALL project types (residential and commercial), within Troy city limits are issued directly by the Montana Department of Labor & Industry Building Codes Bureau, not the City. at 301 E. Kootenai Avenue, Troy, MT 59935. Phone: (406) 295-4151, email: citytroy@troymt.net. Office hours: City Hall, 301 E. Kootenai Ave., Troy, MT 59935; Monday-Friday, 8:00 am to 5:00 pm (closed weekends/holidays); general line (406) 295-4151, email citytroy@troymt.net. Building Inspector David Jones direct line (406) 295-9851, email building.inspector@troymt.net.. Official information: https://cityoftroymontana.com/troy-city-council/city-hall/.

    Troy, 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; non-certified trades and non-certified project scopes in a partially-certified jurisdiction 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/building-codes-permits).; Troy is a Montana DLI-certified jurisdiction for Building (B), RESIDENTIAL ONLY, plus Swimming Pool (SP), within city limits; certified official on file with DLI: David Jones, (406) 295-9851. Verified directly against the DLI Building Codes Bureau's 'Montana Certified Local Government Program' roster PDF (fetched via browser-header curl and read directly with pdftotext, not taken on secondhand summary): 'Troy | B (residential only), SP | David Jones | 295-9851 | City Limits'. This means COMMERCIAL building permits within Troy city limits, and Electrical/Plumbing/Mechanical permits for ALL project types (residential and commercial), are issued DIRECTLY by the Montana DLI Building Codes Bureau, not the City. Source: https://bsd.dli.mt.gov/_docs/building-codes-permits/certified-city.pdf; The City of Troy's own 'Building Permit Requirements' packet (dated February 7, 2023, filename Building Permit Application 2022.docx/pdf) references the '2009 IBC-IRC' on its Inspection Record card ('REMEMBER 2009 IBC-IRC required the permit holder to notify the building official when work is ready for inspection') — the City's packet has not been refreshed to reference the current 2021-edition code, even though the statewide code in force is now the 2021 edition. This is reported as an observed inconsistency in the City's own published document, not an invented fact — directly parallel to the same inconsistency found in Libby's packet.; Per the Montana DLI Building Codes Bureau's Current Codes page (statewide effective date June 11, 2022, applicable to all certified and state-enforced jurisdictions alike): 2021 IBC, 2021 IRC, 2021 IEBC, 2021 IMC, 2021 IFGC, 2021 IECC, 2021 ISPSC, 2021 UPC, 2020 NEC, 2017 ICC A117.1 Accessibility. Source: bsd.dli.mt.gov/building-codes-permits/current-codes; Troy's own Building Permit Requirements packet does not separately name IECC, IEBC, or ISPSC edition years the way Libby's City page does — the City's packet references only the general 'City, State, and National regulations' framing and the 2009 IBC-IRC inspection-card citation noted above. No additional code-edition citations were found on the City's own materials beyond what is reported here; omitted rather than inferred.. Local amendments apply — see the Troy overview page for the full list.

    Sources & verification

    Verified against official sources. Last reviewed 2026-07-04.

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