Required for a new seawall, or an existing one undergoing substantial improvement. A wall being repaired below that threshold may be built to 4.0 ft NAVD88, but only if it is designed and constructed to accommodate a future 5.7 ft.
Source: City of Miami Beach Code Sec. 54-62(a); Ordinance 2025-4754, adopted 23 July 2025; City of Miami Beach maintenance and enforcement provisions · Verified 2026-10
The elevation your city requires, the datum it is measured in, and the section of code that says so. One page.
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The rule changes at the city line, not the county line.
What to look for, where to look for it, and what it means when you find it. Walk your wall in twenty minutes.
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