Plumbing Permit in Westminster, Colorado

Westminster requires a plumbing permit for: Underground repair/replacement of sewer/water lines requires a permit; Relocating plumbing fixtures requires a permit (replacing fixtures in place does not); Whole house water softener system installation requires a permit; Plumbing contractors must hold a City of Westminster Class B Plumbing Contractor license ($110) — issuance requires copies of the state master's and state contractor's license; Beginning May 1, 2026: Plumbing subcontractors must be registered with the City and signed onto the permit prior to permit release. If your project isn't listed, confirm with City of Westminster — Department of Community Development, Building Division at 303-658-2075 before starting work.

A water heater replacement is a flat $40.00 fee per the City of Westminster Building Division Fee Schedule (effective January 1, 2026).

Plan review for a plumbing permit in Westminster typically runs 1–1 business days. This is an estimate, not a published figure — confirm current review times with City of Westminster — Department of Community Development, Building Division at 303-658-2075.

You'll need: Building/Plumbing Permit Application (eTRAKiT); Contractor License Application. See the required-documents checklist on this page for details on each.

Westminster requires 3 inspection(s) for a plumbing permit, in order: Underground / Under-slab, Rough-In, Final. Schedule each through City of Westminster — Department of Community Development, Building Division (303-658-2075).

Apply through City of Westminster — Department of Community Development, Building Division at 4800 W. 92nd Avenue, Westminster, CO 80031. Phone: 303-658-2075, email: permits@westminsterco.gov. Office hours: Mon–Fri, 8 a.m.–5 p.m. (front office); residential permit review walk-through times: Tuesdays 1–4:30 p.m. and Thursdays 9 a.m.–noon; all permits must be applied for online via eTRAKiT. Official information: https://www.westminsterco.gov/621/Building-Division.

Westminster, Colorado has adopted: 2021 International Building Code (IBC) — with City of Westminster amendments; effective June 1, 2024; 2021 International Residential Code (IRC) — with City of Westminster amendments; effective June 1, 2024; 2021 International Fire Code (IFC) — with City of Westminster amendments; effective June 1, 2024; 2021 International Plumbing Code (IPC) — with City of Westminster amendments; effective June 1, 2024; 2021 International Mechanical Code (IMC) — with City of Westminster amendments; effective June 1, 2024; 2021 International Fuel Gas Code (IFGC) — with City of Westminster amendments; effective June 1, 2024; 2021 International Energy Conservation Code (IECC) — adopted per Westminster Municipal Code Section 11-9-11, meeting the Colorado HB22-1362 statewide minimum energy-code floor; Colorado Model Electric Ready and Solar Ready Code — adopted per Westminster Municipal Code Section 11-9-12, with Westminster amendments (waiver/variance provisions for commercial buildings over 10,000 sq ft and substantial cost differential appeals); 2023 National Electrical Code (NEC) / NFPA 70 — current edition (per Westminster's Commercial Plan Review Submittal Guidelines); the City has announced the 2026 NEC will become effective August 1, 2026, superseding the 2023 edition; ICC/ANSI A117.1-2017 — Standard for Accessible Design. Local amendments apply — see the Westminster overview page for the full list.

The City of Westminster Building Division issues plumbing permits itself as part of its single project-permit model. Plumbing contractors must separately hold a Colorado state DORA Plumbing Contractor license, which is a documented prerequisite for the City's own Class B Plumbing Contractor license ($110).