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Guide
Nobody publishes real numbers, so here are honest ranges. Every site differs — access, height, soil, tide window — but these brackets will tell you whether a quote is in the world of reasonable.
| Material | Typical range | Notes |
|---|---|---|
| Timber | $250 – $550 | Lowest upfront, shortest life in brackish water |
| Vinyl sheet pile | $400 – $900 | The residential standard; 40+ year service life |
| Concrete | $700 – $1,500 | Open-water strength; quality of pour is everything |
| Steel sheet pile | $800 – $1,500+ | Deep water / tall walls / commercial duty |
A typical 80-foot creek-front lot in vinyl: roughly $32,000–$72,000 plus permitting and any demolition. Long sea-island runs of 200+ feet scale accordingly — which is why early repair matters most for the biggest properties.
| Repair | Typical range |
|---|---|
| Cap replacement (per section) | $2,000 – $10,000 |
| Crack/joint injection & sealing | $1,500 – $8,000 |
| Helical tieback retrofit (per anchor) | $1,500 – $4,000 |
| Toe stone / scour protection | $3,000 – $15,000 |
| Backfill & void grouting | $2,500 – $12,000 |
Access. Barge work costs more than land access; tight lots between houses cost more than open ones. Height and tide. Taller walls and bigger tidal ranges (Beaufort County's 7–8 ft springs) demand more structure. Soil. Deep pluff mud means longer piles and deeper anchors. Permitting path. Like-for-like replacement in the existing footprint is the cheap lane; redesigns trigger longer review — see the permit guide.