FEMA flood zone rules in West Sacramento, CA — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
WSMC Title 18 (Floodplain Management Regulations) applies to all areas of special flood hazard identified by FEMA. Residential construction must be elevated at least one foot above the base flood elevation (BFE) noted on the Flood Insurance Rate Map.
Special flood-hazard areas (Zones A, AE, AH, AO, AR, and Shaded X behind the levees) cover most of West Sacramento because the city sits between the Sacramento River and the Yolo Bypass. Title 18 requires all new construction and substantial improvements to be anchored against flotation, collapse, and lateral movement. Ordinance 21-3 (March 3, 2021) amended §18.20.010 to add a one-foot freeboard requirement for mechanical equipment. Subdivision plans must identify the flood-hazard area and BFE; pads filled above BFE must be certified by a registered engineer or surveyor.
Building Division and Floodplain Administrator enforcement; non-compliant structures can be required to retrofit or be ineligible for flood insurance.
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