Seawall repair in Coral Gables

Signs you need seawall repair

Call us when you see any of these. Each one lets water and soil move through the wall, and the damage speeds up once it starts.

• Cracks, spalling or rust stains on the cap or face
• Open or leaking joints between panels
• Sinkholes or soft ground just behind the wall
• Water seeping through the wall at high tide
• A cap or panels leaning toward the water

6 ft NGVD, built to carry 7.5 ft

Zoning Code 3-706(C) sets the minimum top of bulkheads and seawalls in Coral Gables at 6 ft NGVD 1929, and the structure must be able to support a wall of 7.5 ft. The City Attorney's 2022 opinion fixed a drafting error that had named NAVD 1988 instead, which matters because the two datums give different numbers for the same height.

A repair that leaves the cap below that height can be the right call, as long as you know a raise may come later.[1]

Fee breaks for living seawalls

Under Resolution 2025-342, Coral Gables cuts city permit fees by 20% for living seawalls that use pH-neutral cement or modular retrofit panels, and waives fees for existing homes making seawall improvements to address sea level rise.

Toe protection is often the cheapest way to add years to a wall that is still sound above the waterline.[2]

DERM approval comes before the City

Coral Gables will not take dock, mooring or wharf plans without Miami-Dade DERM's preliminary approval, and revised plans need DERM's stamp again. The permit set also needs a notarised Public Works application, dimensions across the waterway, existing mangroves and the installation method, so a lift or dock design gets settled with the county first.

Many crack, spall and cap repairs move faster than a rebuild because of that permit route.[3]

What makes Coral Gables different

Dock, mooring and wharf plans must show dimensions across the waterway, existing mangroves and the installation method, and carry DERM's preliminary approval; revised plans need a DERM stamp again. Properties in Cocoplum Section II must include a copy of the Cocoplum dock plan. The City also asks for a notarised Public Works permit application, colour photos of existing conditions and a survey.[3]

Fee incentives

Under Resolution 2025-342, living seawalls with pH-neutral cement or modular retrofit panels qualify for a 20% reduction in city permit fees, and a separate fee waiver applies to existing homes making seawall improvements to address sea level rise.[2]

Permits in Coral Gables

• Miami-Dade DERM, Coastal Resources Section: Class I permit, plus the preliminary approval the City asks to see before it looks at any dock or wall plans. Phone (305) 372-6575.
• City of Coral Gables Development Services and Public Works: Building and Public Works permits for seawalls, bulkheads and docks, after DERM preliminary approval.
• Florida DEP or South Florida Water Management District: State permit or exemption for docks and walls on the Gables canals and the bay, where aquatic preserve rules apply to open bay frontage.
• US Army Corps of Engineers, Jacksonville District: Federal authorisation for bayfront and canal work, confirmed for each job since SPGP VI's stated July 2026 expiry.

How do you repair a seawall?

We start with a close inspection at low tide to find where water and soil are moving. Then the fix matches the fault: crack injection or patching for the face, rebuilt concrete for spalled caps, new tie rods and anchors where the wall is leaning, and compacted fill behind the wall once it is sealed.

1. Inspect the cap, face, joints and toe at low tide
2. Confirm the permit path (exempt, expedited or short form)
3. Seal joints and cracks, repair spalls
4. Replace tiebacks or the cap if needed
5. Backfill and restore the yard

Which seawall repairs need a permit?

Miami-Dade DERM lists as exempt: sealing cracks and spall repair on the cap or face, repair or sealing of pilasters, backfilling landward of an existing seawall, riprap or gunite tubes under an undercut wall no more than 2 ft waterward, and sand-cement bags at the toe no more than 2 ft waterward. Cap and tieback repair or replacement need structurally approved plans from the building department and an expedited DERM authorisation. Your city may still need a building permit.[4]

Repair or replace?

If the panels are sound and the wall is tall enough for local rules, repair is usually the better value. If repairs would cross a city's substantial repair line, such as $300 per linear foot in Miami Beach, you may have to raise the whole wall anyway, and replacement can make more sense.[7]

Frequently asked questions