Miami requires new construction in flood zones to be elevated to the FEMA Base Flood Elevation (BFE) plus freeboard. The city allows up to 5 feet of freeboard above BFE. The Florida Building Code mandates the lowest floor at or above the Design Flood Elevation (DFE).
Miami participates in the National Flood Insurance Program (NFIP) and enforces FEMA flood map requirements through the Florida Building Code and Miami 21 zoning code. The Base Flood Elevation (BFE) is the computed elevation of the 1% annual chance flood (100-year flood) shown on FEMA Flood Insurance Rate Maps (FIRMs). The Design Flood Elevation (DFE) is the BFE plus any community-adopted freeboard. Miami allows up to 5 feet of freeboard above BFE — this additional height provides a safety margin against flooding and can reduce flood insurance premiums. Under FBC Section 1612, the lowest floor of new residential construction in Special Flood Hazard Areas (zones A, AE, V, VE) must be at or above the DFE. In V zones (coastal high hazard), structures must be elevated on pilings or columns with the lowest horizontal structural member at or above the BFE. Substantial improvement (work costing 50%+ of building value) triggers full flood elevation compliance for existing structures. Miami-Dade County's Flood Protection program provides elevation certificates and flood zone determination services. The city's Stormwater Master Plan addresses sea-level rise projections, with current planning assuming 2+ feet of rise by 2060.
Construction below DFE: permit denial or stop-work order. Non-compliant elevation: required to elevate or floodproof at owner's expense. NFIP policy denial for structures knowingly built below BFE. Substantial improvement without elevation: code violation and mandatory compliance.
Miami, FL
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