FEMA flood zone rules in Modesto, CA — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Modesto has significant FEMA flood zones along the Tuolumne River and Dry Creek. Properties in Special Flood Hazard Areas (Zone A/AE) require flood insurance and must comply with floodplain development regulations. Modesto participates in the National Flood Insurance Program (NFIP).
Modesto faces significant flood risk primarily from the Tuolumne River and Dry Creek, with substantial portions of the city within FEMA-designated Special Flood Hazard Areas (Zones A and AE). The city participates in the National Flood Insurance Program (NFIP), requiring all federally-backed mortgages on properties in flood zones to carry flood insurance. Development in floodplains is regulated under both the MMC and the Stanislaus County Floodplain Management Ordinance. New construction and substantial improvements in flood zones must elevate the lowest floor at least 1 foot above the base flood elevation (BFE). Fill and grading in floodways requires an engineering study demonstrating no rise in flood levels. The US Army Corps of Engineers and the Central Valley Flood Protection Board also regulate flood management in the area.
Development in floodplain without permit: stop-work order and penalties. Non-compliance with elevation requirements: denial of occupancy permit.
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See how Modesto's flood zones rules stack up against other locations.
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