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Westminster, CA Fire Regulations: Wildfire Zones (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Adopted code
2025 CA Wildland-Urban Interface Code
Local amendments
None (§ 15.21.020)
Cross-referenced rule
CRC § R902.1.2 roof covering
Baseline roof standard
Class B outside FHSZ/WUI areas
Adopting ordinances
Ord. 2626 (9/24/2025), Ord. 2629 (11/12/2025)

Summary

Westminster adopts the California Wildland-Urban Interface Code, 2025 Edition, as its own Wildland-Urban Interface Code under Section 15.21.010, with no local amendments. Building Code Section 15.10.060 separately requires stricter Class B (or better) roofing for any structure outside a Fire Hazard Severity Zone or WUI area.

Except as provided in this chapter, the California Wildland-Urban Interface Code, 2025 Edition, as published by the California Building Standards Commission, shall be and become the Wildland-Urban Interface Code of the city. The California Wildland-Urban Interface Code will be on file for public examination in the office of the building official. ... Section R902.1.2 is amended by revising it to require a minimum Class B roof: R902.1.2 Roof coverings in all other areas other than Fire Hazard Severity Zones or a Wildland-Urban Interface (WUI) area.

View official code

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, states that except as provided in that chapter, the California Wildland-Urban Interface Code, 2025 Edition, as published by the California Building Standards Commission, shall be and become the Wildland-Urban Interface Code of the city, and a copy is kept on file for public examination in the office of the Building Official. 020 confirms the 2025 Edition of that code is adopted with no local amendments, so the state text governs wildfire building standards in Westminster without any city-specific carve-outs. 2 to require that 'Roof coverings in all other areas other than Fire Hazard Severity Zones or a Wildland-Urban Interface (WUI) area' meet at minimum a Class B fire-retardant roof covering standard whenever more than half of an existing roof is replaced within a year, on any new structure, or on any roof covering applied during alteration, repair or replacement.

The 'other than' clause signals that property located inside a Fire Hazard Severity Zone or WUI area is held to the WUI Code's own, generally stricter Chapter 7A material standards rather than to the base Class B minimum that applies elsewhere in the city.

Violations & Fines

A structure inside a Fire Hazard Severity Zone or WUI area that is built or re-roofed to only the citywide Class B minimum, instead of meeting the California Wildland-Urban Interface Code adopted at Section 15.21.010, fails Building Official plan review and inspection. Both chapters were adopted by Ordinance 2626 (Sept. 24, 2025) and Ordinance 2629 (Nov. 12, 2025), and compliance is checked at permit issuance and final inspection.

Frequently Asked Questions

Does Westminster regulate construction in wildfire zones?
Yes. Section 15.21.010 adopts the California Wildland-Urban Interface Code, 2025 Edition, as the city's own Wildland-Urban Interface Code in full, and Section 15.21.020 confirms it applies with no local amendments layered on top.
Are roofing rules different inside a Fire Hazard Severity Zone?
Yes. Section 15.10.060 amends California Residential Code Section R902.1.2 so the citywide Class B minimum roof covering applies only in areas other than a Fire Hazard Severity Zone or Wildland-Urban Interface area; property inside those zones is instead governed by the adopted Wildland-Urban Interface Code.
What agency enforces the WUI Code in Westminster?
The Wildland-Urban Interface Code is administered through the city's Building Official under Chapter 15.21, working alongside the Orange County Fire Authority, which the Fire Code names as the fire authority having jurisdiction over fire and life-safety matters citywide.

Sources & Official References

Other rules in Westminster

All Westminster rules

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