FEMA flood zone rules in York County, SC — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
York County administers its own Flood Damage Prevention ordinance, Chapter 151, to keep the county in the National Flood Insurance Program. A floodplain development permit is required before any development in a mapped area of special flood hazard.
York County participates in the National Flood Insurance Program and enforces Chapter 151 of its Code of Ordinances, Flood Damage Prevention, most recently amended in 2024. The flood risk here is riverine, driven by the Catawba River, Lake Wylie, the Broad River, and their tributaries rather than coastal surge, with Duke Energy dam operations affecting lake levels. Before any development, fill, or construction in a FEMA area of special flood hazard, the owner must apply to the county floodplain administrator for a development permit. New and substantially improved structures must have their lowest floor elevated to or above the base flood elevation, plus freeboard in the Regent Park Floodplain Overlay District, documented by an elevation certificate.
Building, filling, or substantially improving a structure in a special flood hazard area without a floodplain development permit exposes the owner to county enforcement, mandatory removal, higher flood insurance premiums, and loss of coverage eligibility.
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