Yorba Linda, CA Environmental Rules: Flood Zones (2026)

Yorba Linda Municipal Code Section 15.12.060 applies the Flood Damage Protection chapter to all areas of special flood hazard within the city, as identified in the Flood Insurance Study and Flood Insurance Rate Map dated September 15, 1989, and later amendments, adopted by reference under Section 15.12.070 and on file at the Engineering Department. Section 15.12.110 requires a Floodplain Development Permit before construction or development begins in any special flood hazard area, with the application, made on forms from the Floodplain Administrator, needing scaled plans showing the nature, location, dimensions and elevation of existing or proposed structures, fill, storage of materials and drainage facilities, plus the proposed elevation of the lowest floor relative to mean sea level and certifications required elsewhere in the chapter.

Section 15.12.120 designates the Building Official as Floodplain Administrator, responsible for granting or denying permits, reviewing state and federal permit compliance, confirming a site is reasonably safe from flooding, and ensuring proposed development will not cumulatively raise the base flood water surface elevation by more than one foot, per Section 15.12.130. Section 15.12.080 makes it unlawful to construct, locate, extend, convert or alter any structure or land without full compliance with the chapter, and any violation, including breach of conditions attached to a permit, constitutes a misdemeanor; the City Council may take further lawful action to prevent or remedy violations.