Plantation, FL Environmental Rules: Flood Elevation Requirements (2026)

5 feet, half a foot above the Florida Building Code's own minimum. 2, is anchored against flotation and lateral movement, is built of flood damage-resistant materials below base flood elevation plus one foot, and has its mechanical, plumbing and electrical systems elevated to that same plus-one-foot line. Enclosures below elevated buildings are flatly prohibited under Section 9-12(c)(2), including breakaway-wall enclosures. Fill placed to raise a building must meet the compaction standard of ASTM D-698 or the FBC's engineered-fill requirements under Section 9-12(c)(3). Critical facilities get the strictest standard: Section 9-12(c)(4) requires them to sit outside the special flood hazard area where a feasible alternative site exists, and if built inside it, they must be elevated to base flood elevation plus three feet or the 500-year flood elevation, whichever is higher, with flood-proofing to keep toxic substances out of floodwater.

Section 9-12(c)(5) defines a 'substantial improvement,' the trigger for full compliance, as repair or renovation work whose cumulative cost over any five-year period equals or exceeds 50 percent of the building's market value; a structure that already suffered 'substantial damage' is treated as a substantial improvement regardless of the repair's scope. The Engineering Department separately charges a fee for the elevation certificates owners use to support flood insurance applications under Section 9-19.