Living shoreline or hardened edge?
Living shoreline
- Works with an estuarine shoreline rather than replacing the whole edge with a hard wall
- Can use native plants and nature-based materials, sometimes with reef or sill elements
- Needs site conditions that can support the design
- Aims to maintain natural water movement and shoreline processes
Seawall / bulkhead
- Uses a rigid structure to retain upland soil
- Can remain part of the conversation when important improvements sit close to the edge
- May fit sites with stronger existing hardening or constraints
- Changes the natural shoreline and receives coastal review
There is no single best answer for every Charleston waterfront property.
The decision is really about site conditions.
Water energy
Waves, boat wakes, wind exposure, current, and fetch influence what can stay in place.
Shoreline shape
Slope, elevation, marsh edge, and room between the water and upland improvements matter.
Why soil is leaving
Wave attack, runoff, drainage, scour, and erosion around existing structures can require different answers.
What is at risk
A lawn edge is a different problem from erosion close to a house, pool, road, septic system, or utility.
A living shoreline is more than planting marsh grass.
South Carolina treats it as a designed shoreline-stabilization project. The design must protect navigation and public use, maintain water movement and aquatic-organism movement, preserve shoreline ecological processes, and remain secure enough to avoid becoming marine debris.
SCDES says they can provide environmental benefits and reduce impacts associated with traditional hardened erosion-control structures.
SCDES Living Shorelines ↗Assess the site before design gets expensive.
Assess
Understand erosion cause, energy, slope, habitat, nearby structures, and what is at risk.
→Design
Professional drawings translate the site into a stabilization approach that fits the shoreline.
→State permit
Living shoreline installations require an individual SCDES critical-area permit.
→Federal + local
Army Corps authorization and local requirements may also apply.
SCDES treats living shorelines as minor critical-area activities. The source reviewed for this guide lists a $250 administrative fee and a 15-calendar-day public notice after a complete application is accepted.
SCDES minor critical-area permits ↗The Critical Area Line can be part of the project.
SCDES requires a current Department-certified Critical Area Line for a living shoreline at the marsh-upland interface. A certified line can generally remain valid for up to five years.
SCDES Critical Area Line guidance ↗Not every waterfront property is eligible.
SCDES requires the lot to qualify as waterfront property under the coastal regulations. In general, the property’s shore-perpendicular side lines must reach a navigable watercourse within 1,000 feet of the marsh critical line, or the property must be identified through an approved Dock Master Plan with a different corridor.
South Carolina Regulation 30-12 ↗A federal permit can apply too.
The 2026 Nationwide Permits took effect March 15, 2026. Nationwide Permit 54 is the federal nationwide permit specifically for qualifying living shoreline work, subject to its terms, regional conditions, and required review.
Army Corps Nationwide Permits ↗Your local permit layer
Which local government handles the property?
Use the jurisdiction for the parcel, not only the island or mailing address. The local layer sits on top of the SCDES shoreline rules.
Start with the parcel, not the mailing address.
James Island, Johns Island, and other Charleston-area place names can include more than one local government.
Until the jurisdiction is confirmed, treat SCDES and any federal approval as the waterfront baseline and ask the local building or zoning office whether it has an additional review.
Show the whole shoreline, not just the worst spot.
Do not enter unstable marsh, climb a failing wall, or get into the water just to take a photo.
Which kind of pro do you need?
If the project is clearly an existing wall repair, a marine contractor with bulkhead or seawall experience may be the right starting point. If the solution is still unclear, shoreline assessment, design, engineering, surveying, or permitting help may come first.
Primary sources