FEMA flood zone rules in Lodi, CA — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Lodi participates in the National Flood Insurance Program and enforces FEMA flood-zone building standards under Lodi Municipal Code Chapter 15.60; portions of the city near the Mokelumne River and Smith Canal sit in the 100-year floodplain.
Lodi Municipal Code Title 15, Chapter 15.60 (Flood Damage Prevention) adopts FEMA's National Flood Insurance Program standards. New construction, substantial improvements, and substantial damage repairs within a Special Flood Hazard Area (SFHA — Zone A/AE) require a floodplain development permit and the lowest floor must be elevated to or above the Base Flood Elevation (BFE) shown on the effective FIRM. The Mokelumne River historically flooded northwest Lodi and Woodbridge in November 1950, evacuating ~1,000 residents, and parts of the city remain mapped in the 100-year floodplain. A $100 million Smith Canal floodgate (completed 2024) protects roughly 1,700 downstream homes. Property owners can verify their zone on the FEMA Flood Map Service Center.
Building in a Special Flood Hazard Area without a floodplain permit, or below BFE, is a violation of LMC Ch. 15.60. Enforcement can include stop-work orders, required structural elevation/retrofit, denial of NFIP flood insurance discounts, and loss of community CRS standing.
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