Building or remodeling in a Special Flood Hazard Area (floodplain) requires adherence to specific regulations and guidelines to minimize flood damage and ensure safety. These typically involve substantial improvement / substantial damage regulations, elevating the lowest floor of the building to one foot about flood plain elevation, using flood-resistant materials, and potentially incorporating flood vents and other flood-proofing measures. Local jurisdictions often have additional requirements, so consulting with your local flood plain administrator is crucial.