Miami Marine Contractor
If your Miami seawall has rotated more than 4 inches, has perforated panels, or has reached the end of its service life, full seawall replacement is the right call. We engineer to current Miami-Dade code and the Miami Beach July 2025 5.7 ft NAVD ordinance.
Seawall replacement in Miami is a full structural rebuild: new sheet pile panels driven to engineered depth, new tieback anchors set to engineered capacity, a new cap engineered to the elevation that current code requires (5.7 ft NAVD in Miami Beach), and a complete corrosion-protection package designed for South Florida saltwater.
New panels are driven from a shallow-draft work barge using an impact or vibratory hammer sized to the panel and soil. Embedment depth is set by the engineer of record based on soil borings or, more commonly for residential canals, conservative published values for Miami oolitic limestone with overburden.
Tiebacks are typically helical anchors set behind the wall at engineered spacing (usually 6 to 10 feet on residential walls) and torqued to capacity. For very high walls or commercial loads, deadman anchors with corrosion-protected steel rods are also used.
The cap is reinforced concrete, poured to the elevation required by current code, with corrosion inhibitor additives and 1.5 inches minimum clear cover on rebar per ACI guidance for saltwater exposure. The cap connects panels and tiebacks into a single rigid structure.
Behind the new wall, free-draining backfill is placed in lifts and compacted, often with weep tubes or relief drains to prevent hydrostatic pressure buildup during king tides and rain events. Filter fabric prevents soil migration through joints.
Final inspections by DERM and the local municipality close out the permit. We provide a project binder with sealed drawings, inspection cards, warranty documents, and material specifications for your records and for the next owner of the property.
| Material | Service life (saltwater) | Cost / LF | Best use |
|---|---|---|---|
| Vinyl sheet pile (PVC composite) | 50+ years | $850 to $1,400 | Residential canals, sheltered water |
| Composite (FRP) | 50+ years | $1,200 to $1,800 | Impact-prone, high UV |
| Concrete sheet pile | 50 to 75 years | $1,500 to $2,200 | Open bay, Intracoastal frontage |
| Steel sheet pile (coated) | 40 to 60 years | $1,400 to $2,000 | Heavy commercial, deep cuts |
| Timber (CCA pile + lagging) | 25 to 35 years | $700 to $1,000 | Rarely used new in Miami today |
For most Miami residential canal frontage, vinyl is the right answer. Concrete becomes attractive on Intracoastal or bay frontage with consistent wave action.
Why Miami Chooses Us
Every replacement is engineered to Miami-Dade FBC HVHZ wind, current ASCE 7 wave loading where applicable, and the Miami Beach 5.7 ft NAVD ordinance. We do not copy-paste plans from one canal to another. Soil profile, water depth, and adjacent structure are reviewed for every job.
100% jobs sealed by FL PEFor roughly 60 percent of Miami residential walls, we can drive new sheet pile waterside of the existing wall. That eliminates dewatering, preserves landscape and pool decks, and shortens timeline by 1 to 2 weeks. We evaluate this option on every quote.
~60% jobs face-of-wall capableDERM, the relevant municipality, USACE for navigable waters, FDEP for environmental sensitive areas. We prepare submittals, respond to comments, and track the project through issuance. The Miami Beach 730-day compliance window starts when DERM notifies you, not when you finish, so timing matters.
Permits prepared and submitted in-houseReplacement projects in Miami face two specific local pressures. First, the Miami Beach July 2025 ordinance mandates 5.7 ft NAVD 88 minimum elevation for new seawalls, with fines starting at 250 dollars per offense and 500 per day after, and a 730-day compliance window for walls flagged as overtopping. Second, Miami-Dade's hurricane code (FBC HVHZ) requires wind and wave loading that exceeds inland Florida standards. Both are baked into every set of drawings we submit, so you are not retrofit-rebuilding to a tighter standard a year later.
"Two tiebacks had clearly failed and the cap was rotating. They installed new helical anchors through the cap with all the torque logging the engineer wanted. Clean job, no excavation, no landscape repair after."Olivia F.Bal Harbour · Helical anchor pull-back
"Old wall was past its time and a partial replacement did not make sense. They did 90 linear feet of full vinyl sheet pile replacement waterside of the existing wall. Took 4 weeks including permits. Crew was respectful of neighbors throughout."Mark B.Surfside · Full sheet pile replacement
"We had a sinkhole opening up about four feet behind the cap, getting bigger every king tide. Crew was on site in three days, did the whole injection in one afternoon, and patched the ports flush. Yard is solid eight months later. No upsell, no pressure."James M.Coconut Grove · Polyurethane foam injection
Miami seawall replacement runs 850 to 2,200 dollars per linear foot depending on panel type, cap design, water depth, soil conditions, and access. Vinyl is the most cost-effective for residential canals. Concrete is the most durable but adds 30 to 50 percent. Composite splits the difference.
A typical 100 to 150 foot residential replacement takes 3 to 8 weeks from mobilization to final inspection, including cure time for the cap and tieback grout. Permits often take longer than the build, particularly for Miami Beach 5.7 ft NAVD ordinance projects requiring DERM and city review.
For most residential Miami canals, vinyl sheet pile is the best balance of cost, durability, and saltwater resistance. Vinyl will not corrode, has a 50-plus year service life in marine environments, and weighs 60 percent less than concrete which reduces driving stress and barge load. Concrete panels are preferable for high wave exposure (open bay, Intracoastal frontage). Composite is used where impact resistance matters.
Not always. We frequently drive new sheet pile waterside of the existing wall (a face-of-wall replacement), leaving the old structure as a buried backstop. This avoids dewatering, preserves landscape, and shortens timeline. When the old wall must come out, we use waterside saw-cut and removal.
Free inspection, scoped written estimate, no high-pressure close.
Schedule Free Inspectionor call (555) 000-0000