Environmental Rules in Westminster, CA (2026)
4 verified environmental rules for Westminster, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Westminster regulates stormwater under Chapter 8.30 (Water Quality), the city's implementation of its Santa Ana Regional Water Quality Control Board NPDES permit. Before the city issues a discretionary land use, grading, or building permit for new development or significant redevelopment, the property owner must submit and get engineering-division approval of a water quality management plan that reduces or eliminates pollutants in the project's storm water runoff.
Westminster Requires Water Quality Plans for Runoff
Significant RestrictionsWestminster Municipal Code § 8.30.040(A)
All new development and significant redevelopment within the city of Westminster shall: Require a water quality management plan which shall be prepared in accordance with the DAMP; and Meet any conditions and requirements established by the engineering division which are reasonably related to the reduction or elimination of pollutants in storm water runoff from the project site. ... Prior to th...
Flood Zones
Westminster requires a separate development permit, on top of any building or grading permit, before anyone builds or otherwise develops land, including manufactured homes, inside a special flood hazard area mapped on the FEMA Flood Insurance Rate Map for Orange County. Chapter 8.55 (Flood Damage Prevention), enacted under state Government Code authority, sets the application requirements and makes the city engineer the floodplain administrator who grants or denies them.
Westminster Flood Zone Development Permit Rules
Significant RestrictionsWestminster Municipal Code § 8.55.130
A development permit shall be obtained before construction or other development, including manufactured homes, within any area of special flood hazards established in Section 8.55.070. Application for a development permit shall be made on forms furnished by the city of Westminster.
Defensible Space
Westminster's Fire Code requires every new structure built next to land carrying hazardous combustible vegetation to install and maintain an approved fuel modification zone that meets Orange County Fire Authority Guideline C-05, governing the type, amount, arrangement and upkeep of vegetation in that zone. The rule sits alongside a citywide duty to cut and remove weeds, grass and vines capable of igniting and endangering property, per Fire Code §§ 304.1.3 and 324.
Westminster's Fuel Modification Rule for New Construction
Some RestrictionsWestminster Municipal Code § 15.22.040 (Fire Code §§ 304.1.3, 324)
304.1.3 Vegetation. Weeds, grass, vines or other growth that is capable of being ignited and endangering property, shall be cut down and removed by the owner or occupant of the premises. Vegetation clearance requirement in urban-wildland interface areas shall be in accordance with Part 7, the California Wildland-Urban Interface Code. Type, amount, arrangement, and maintenance of vegetation in a...
Flood Elevation Requirements
Westminster requires new or substantially improved residential structures in a mapped special flood hazard area to elevate the lowest floor, including any basement, to or above the base flood elevation shown on the FEMA Flood Insurance Rate Map, per § 8.55.160(C)(1). The city does not add a freeboard cushion above that federal BFE: the standard is elevation 'to or above' BFE, not BFE-plus-a-foot.
Westminster's Flood Elevation Building Standard
Some RestrictionsWestminster Municipal Code § 8.55.160(C)(1)
Residential Construction. All new construction or substantial improvements of residential structures shall have the lowest floor, including basement: a. In an AO zone, elevated to or above the base flood elevation. b. In an AO zone, elevated above the highest adjacent grade to a height equal to or exceeding the depth number specified in feet on the FIRM, or elevated at least two feet above the ...
Looking for Orange County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Westminster city rules.
Environmental Rules in Orange County →