Port Orange, FL Environmental Rules: Flood Elevation Requirements (2026)

1 of the Florida Building Code, Residential, as adopted for use within Port Orange. The amended rule sets four elevation thresholds depending on the flood zone: buildings and structures in flood hazard areas not designated as Coastal A Zones must have their lowest floors elevated to or above the base flood elevation plus one foot, or the design flood elevation, whichever is higher; buildings in Coastal A Zones face the same one-foot-above-BFE standard; buildings in shallow-flooding AO zones must have their lowest floor, including any basement, elevated at least as high as the FIRM's specified depth number plus one foot, or at least three feet if no depth number is specified; and basement floors that are below grade on all sides must likewise sit at or above the base flood elevation plus one foot or the design flood elevation.

2 pushes coastal high-hazard (zone V) structures even higher, requiring the lowest horizontal structural member to sit at base flood elevation plus one foot, or plus two feet if it is oriented perpendicular to the direction of wave approach. 2. The floodplain administrator, working with the building official, reviews the required elevation certification once the lowest floor is placed and again at final inspection, and a Florida-licensed surveyor's certification of the finished elevation is required before construction can proceed to the next vertical stage.