FEMA flood zone rules in Charleston, SC — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Charleston has extensive flood zones and participates in the NFIP Community Rating System. Development in flood zones must comply with the Flood Damage Prevention Ordinance requiring elevation of structures above base flood elevation.
Charleston is one of the most flood-prone cities in the US and has comprehensive flood regulations under its Flood Damage Prevention Ordinance (Chapter 27, Article II). All new construction and substantial improvements in FEMA-designated flood zones must elevate the lowest floor at least 2 feet above the Base Flood Elevation (BFE). The city participates in the NFIP Community Rating System, earning flood insurance discounts for residents. Flood zone determination is required for all building permits. Fill, development, and encroachment in floodways is heavily restricted.
Construction without proper flood elevation is a serious violation resulting in stop-work orders, fines, and denial of flood insurance.
Charleston, SC
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Side-by-side rule comparisons with other cities in Charleston County.
See how other cities in Charleston County handle flood zones.
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