Seawall Repair Sullivan's Island, SC

SC DHEC-OCRM critical-area permit + Charleston County. USACE Charleston District; SC DHEC Office of Ocean & Coastal Resource Management (OCRM). Under the SC Beachfront Management Act, new oceanfront seawalls are banned - work focuses on bulkheads, riprap and living shorelines on the Intracoastal and tidal creeks

We serve waterfront properties along Charleston Harbor, the Intracoastal Waterway, and Cove Inlet. Service areas include Sullivan's Island, Cove Inlet. Call 866-398-9323 to confirm service at your specific address.

Harbor and Cove Inlet tidal current; oceanfront armoring banned; aging creek-side bulkheads.

Seawall repair in Sullivan's Island typically costs $200–$575 per linear foot. An 80-foot Charleston Harbor and the Intracoastal Waterway residential bulkhead runs $10,000–$32,000 for repair versus $35,000–$70,000 for full replacement. Call 866-398-9323 for a free on-site estimate.

The primary causes are Charleston Harbor mouth tidal range of 5-6 feet with Breach Inlet and Fort Moultrie channel tidal current effects. Combined with Charleston County harbor entrance barrier island soils with historic military installation environmental considerations, these forces accelerate void formation, panel cracking, and joint separation. Sullivan's Island sits at the mouth of Charleston Harbor, exposing seawalls to the maximum 5-6 foot tidal amplitude plus Fort Moultrie channel current effects — one of the most demanding seawall environments in the Carolinas.

Most Sullivan's Island seawall repairs using polyurethane injection or helical tiebacks are completed in 1–2 days. We schedule work around low tide windows for maximum access and accuracy.

Structural repairs including tieback installation and cap replacement require Charleston County permits and may require DEP or Army Corps review for waterfront properties adjacent to Charleston Harbor and the Intracoastal Waterway. Polyurethane injection and maintenance repairs generally do not require permits. We handle all permitting coordination for major projects.

We recommend annual inspections for seawalls older than 20 years, plus inspection after every named storm event. Sullivan's Island sits at the mouth of Charleston Harbor, exposing seawalls to the maximum 5-6 foot tidal amplitude plus Fort Moultrie channel current effects — one of the most demanding seawall environments in the Carolinas. Early detection of voids and micro-cracks costs far less to address than waiting for visible structural failure.