Can I build a dock or seawall on my Miami waterfront property?
Answered by AskBaily Editorial · Updated
Short answer
Most waterfront work triggers a combined permit stack: Miami-Dade DERM (Environmental Resource Management), Florida Department of Environmental Protection (FDEP submerged lands authorization), U.S. Army Corps of Engineers, and — in Biscayne Bay Aquatic Preserve — an ERP from the state. Timelines run 6-18 months. Seawall elevation under new sea-level-rise mandates frequently increases design freeboard by 1.5-2 feet over legacy seawalls.
In detail
Most waterfront work on a Miami property — seawall, dock, boat lift, or shoreline stabilization — triggers a stack of overlapping permits because Biscayne Bay sits within multiple regulated jurisdictions. The minimum permit set:
- Miami-Dade Department of Environmental Resources Management (DERM) Class I, II, or III permit under Chapter 24 of the Miami-Dade County Code. Class I covers work in tidal waters and is the most common.
- Florida Department of Environmental Protection Submerged Lands & Environmental Resource Permit. Sovereign Submerged Lands authorization under Florida Statutes Section 253.77 and the Environmental Resource Permit (ERP) under Section 373.4145.
- U.S. Army Corps of Engineers Section 10 (Rivers & Harbors Act of 1899) and/or Section 404 (Clean Water Act) authorization. Most residential seawall replacements clear under Nationwide Permit 13 (bank stabilization) or NWP 3 (maintenance).
- Local municipal building permit (City of Miami, Miami Beach, Coral Gables, Key Biscayne, Sunny Isles) with sealed structural drawings.
Biscayne Bay Aquatic Preserve overlay — the entire bay south of NE 79th Street is protected under Florida Statutes Section 258.397. ERP applications inside the preserve trigger a stricter "public interest" test under Section 373.414(1)(a), longer review (5-9 months), and frequently a manatee-protection construction condition.
Elevation requirements have tightened. Miami-Dade Resilient305 and the City of Miami Resolution R-19-0470 have driven seawall design freeboard up by 1.5-2.0 feet over legacy elevations. Miami-Dade's Seawall Standards (Code Chapter 24-48.18) now require a minimum top-of-cap elevation of NAVD88 +5.0 feet for new and replacement seawalls in unincorporated areas, with municipalities (Miami Beach, Coral Gables) often requiring +5.7 feet.
Realistic timelines:
- Seawall replacement (in-place): 6-9 months across DERM, FDEP, USACE, and local building.
- New seawall, dock, or lift: 9-18 months.
- Anything inside Biscayne Bay Aquatic Preserve or seaward of the CCCL: 12-24 months.
Budget for a pre-application meeting with DERM (mandatory under Chapter 24-48.5) and a coastal engineer before drawing scope.
Sources
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