Plumbing Permit in Great Falls, Montana

A plumbing permit is generally required, with a fee of $16.46 for the water heater fixture plus the $34.39 issuance fee, per Resolution No. 10374. Homeowners doing the work themselves on their own owner-occupied, non-rental residence may qualify for an exemption or a Homeowner's Plumbing Permit — confirm with the City Plumbing Inspector at (406) 455-8531.

In Great Falls, the published Permit Issuance Fee is: $34.39. Additional published fees: Each plumbing fixture or trap (or set of fixtures on one trap) — $12.65; Water service — repair, replacement, or new (1 only) — $27.87; Water heater installation — $16.46; Water piping or water-treating equipment installation/alteration/repair — $7.61 each; Lawn sprinkler system (per meter, incl. backflow protection) — $19.04; Private swimming pool — $75.86; Private spa — $37.94; Re-inspection Fee — $67.63 per hour, minimum 1-hour charge; Investigation Fee (work commenced before permit issuance) — Equal to the permit fee. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Plan review for a plumbing permit in Great Falls typically runs 1–10 business days. This is an estimate, not a published figure — confirm current review times with City of Great Falls Building Division (Planning & Community Development Department) at (406) 455-8430.

Depending on your project, Great Falls may also ask for: Homeowner's Plumbing Permit Application. See the required-documents checklist on this page for details on each.

Great Falls requires 3 inspection(s) for a plumbing permit, in order: Underground / Slab Plumbing, Rough-In, Final. Schedule each through City of Great Falls Building Division (Planning & Community Development Department) ((406) 455-8430).

Apply through City of Great Falls Building Division (Planning & Community Development Department) at Civic Center, 2 Park Drive South, Room 112, P.O. Box 5021, Great Falls, MT 59403-5021. Phone: (406) 455-8430, email: permit@greatfallsmt.gov. Office hours: Mon-Fri 8:00 AM - 5:00 PM. Official information: https://greatfallsmt.gov/627/Building-Division.

Great Falls, Montana has adopted: 2021 International Building Code (IBC) — adopted by the City of Great Falls September 9, 2022, effective per city adoption (state effective date June 11, 2022 under ARM Title 24, Chapter 301); city stopped accepting the prior 2018-cycle codes as of November 9, 2022; 2021 International Residential Code (IRC) — adopted September 9, 2022; 2021 International Existing Building Code (IEBC) — adopted September 9, 2022; 2021 Uniform Plumbing Code (UPC) — adopted September 9, 2022 (Montana uses the UPC, not the International Plumbing Code); 2021 International Mechanical Code (IMC) — adopted September 9, 2022; 2021 International Fuel Gas Code (IFGC) — adopted September 9, 2022; 2020 National Electrical Code (NEC) — adopted September 9, 2022 (Montana's statewide NEC edition is 2020, not 2021, per ARM Title 24, Chapter 301); 2021 International Energy Conservation Code (IECC) — adopted September 9, 2022; 2021 International Swimming Pool and Spa Code (ISPSC) — adopted September 9, 2022; 2021 International Wildland-Urban Interface Code (IWUIC) — part of the certified program scope ("W"); ICC A117.1-2017 Accessibility Code — statewide standard incorporated by reference; 2021 International Fire Code (IFC) — adopted separately by the City of Great Falls effective May 25, 2023 (amending OCCGF Title 15), administered by Great Falls Fire Rescue rather than the Building Division. Local amendments apply — see the Great Falls overview page for the full list.

The 2021 Uniform Plumbing Code (UPC), adopted by the City of Great Falls September 9, 2022, matching Montana's statewide UPC adoption — not the International Plumbing Code.