Westminster, CA Building Safety: Plumbing Permits (2026)
Key Facts
- Adopted code
- 2025 California Plumbing Code
- Base standard
- 2024 Uniform Plumbing Code (IAPMO)
- Underground water piping
- Min. 40 mils plastic sleeve required
- Buried gas piping
- Approved polyethylene required
- Adopting ordinance
- Ord. 2629, 11/12/2025
Summary
Westminster regulates plumbing installation, alteration, repair and use under the 2025 California Plumbing Code, based on the 2024 Uniform Plumbing Code. Section 15.16.010 makes that code the city's plumbing code, and it layers local amendments onto underground water piping and buried gas piping materials before the Building Official signs off on plumbing work.
Except as provided in this chapter, the California Plumbing Code, 2025 Edition, based on the 2024 Uniform Plumbing Code as published by the International Association of Plumbing and Mechanical Officials (IAPMO), shall be and become the plumbing code of the city, regulating erection, installation, alteration, repair, relocation, replacement, maintenance or use of plumbing systems within the city. The California Plumbing Code will be on file for public examination in the office of the building official.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4982734; v10 updated 2026-06-10).
Full Breakdown
010, adopts the 2025 Edition of the California Plumbing Code, based on the 2024 Uniform Plumbing Code published by the International Association of Plumbing and Mechanical Officials, as the plumbing code of the city. It governs erection, installation, alteration, repair, relocation, replacement, maintenance and use of plumbing systems within Westminster, and the adopted code is kept on file for public examination in the office of the Building Official. 14, Underground piping material: metal piping is barred under a floor slab within a building, and all metallic pipe, fittings and fixture parts buried in the ground must be protected by at least 40 mils of plastic sleeve or equivalent wrapping.
1, Exterior buried piping systems, which requires approved polyethylene or other pipe material approved for underground installation in exterior buried gas piping. All three sections were adopted by Ordinance 2629 on November 12, 2025, and apply on top of the base 2025 California Plumbing Code to any plumbing permit the Building Division issues. Because these are permit-triggered material standards, a plumbing contractor's rough-in inspection checks compliance with both the state code and these two Westminster-specific piping amendments before the Building Official approves cover-up.
Violations & Fines
Plumbing work that skips the required permit, or that uses bare metal piping under a floor slab or unprotected metallic pipe underground without the 40-mil plastic sleeve required by Section 15.16.020, fails the Building Official's rough-in inspection and cannot be covered until corrected. Exterior gas piping installed with material other than approved polyethylene under Section 15.16.030 is rejected on the same basis.
Frequently Asked Questions
What plumbing code applies in Westminster?
Are there local rules for underground water pipes?
What material is required for buried gas piping outside the building?
Sources & Official References
Other rules in Westminster
California rules heatmap·Compare Westminster to another location·View the California building safety overview
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