Menifee, CA Environmental Rules: Flood Zones (2026)

FEMA flood maps for Riverside County (effective panels include 06065C-series, most recently updated August 28, 2008 county-wide with revisions thereafter) identify SFHAs in Menifee primarily along Salt Creek, the Romoland drainage, and Paloma Wash. New construction or substantial improvements (work valued at ≥50% of pre-improvement market value) in a Zone A/AE area must have the lowest floor elevated to or above the Base Flood Elevation (BFE), typically with 1 foot of freeboard per California Building Code Appendix G. Manufactured homes in SFHAs must be elevated on permanent foundations. Non-residential structures may be dry- or wet-floodproofed to the BFE. An Elevation Certificate prepared by a licensed surveyor is required after construction. Substantial damage (≥50% of pre-damage value) triggers the same elevation requirement during repair. Fill, grading, or development in the regulatory floodway requires a no-rise certification or a Conditional Letter of Map Revision (CLOMR). Menifee adopted floodplain provisions through the California Building Code Appendix G (mandatory in California per 24 CCR Part 2) and via the inherited Riverside County floodplain ordinance carried forward at incorporation.