Manatee County, FL Environmental Rules: Flood Elevation Requirements (2026)

The Florida Building Code, Residential amendment at Sec. 2-10-25 requires that buildings in flood hazard areas, including coastal A zones, have their lowest floor elevated to or above the base flood elevation plus 1 foot, or the design flood elevation, whichever is higher. In AO zones, the lowest floor must clear the highest adjacent grade by the FIRM depth number plus 1 foot, or 4 feet if no depth number is shown. Basement floors below grade on all sides are prohibited outright in coastal high-hazard areas and coastal A zones under the companion amendment at Sec.

2-10-25(b). Sec. 2-10-26 applies the same 1-foot freeboard standard, base flood elevation plus 1 foot or ASCE 24 (whichever is higher), to buildings covered by the Florida Building Code, Building. Enclosed space below the design flood elevation may be used only for vehicle parking, building access or storage, cannot be finished into rooms, and cannot hold air conditioning equipment, electrical devices or plumbing fixtures except as needed for safety, per Sec. 2-10-21(c)(1)A-B. Applicants for elevated buildings must record a statement of these limitations with the Clerk of Circuit Court.

The county building official serves as floodplain administrator, reviewing site plans, issuing floodplain development permits for structures the Florida Building Code exempts, and inspecting the lowest-floor elevation before and after construction. A floodplain development permit lapses if work does not start within 180 days, with 180-day extensions available on written request. Variance requests and appeals go to the county hearing officer under Sec. 2-10-21(f); a decision may be appealed to circuit court within 30 days of issuance.