Free tool 20+ years on the water 8 states served
Last updated: July 2026 — pricing from real seawall projects.
A seawall typically costs $150–$650+ per linear foot, depending on the material, wall height, length and how much wave energy the site takes. Use this free calculator to estimate your seawall price by material — vinyl, timber, steel, concrete or riprap armor stone — then download a PDF estimate to keep. Protecting a quieter inland bank instead? Our bulkhead cost calculator uses the same baseline ranges, or building a pier try our pier cost calculator.
A seawall costs $150–$650+ per linear foot installed — wood and riprap armor stone are usually the lowest-cost options, marine-grade vinyl is the popular low-maintenance choice, and steel or concrete are used on taller walls and high wave-energy coastlines where surge and wake loads are highest.
Those figures describe a residential shoreline of roughly 100 linear feet or more with land access for equipment, at a wall height of about four to six feet. Runs shorter than about 75 feet, barge-only access, taller walls, saltwater exposure, or an existing wall that has to come out first all price above the range — a short wall carries the same permit, engineering and mobilization cost as a long one, spread over fewer feet.
Most recent seawall number we can show: a 140 ft riprap revetment seawall on Kimble Lake, Vicksburg, Michigan, freshwater, August 2026 — $231 per linear foot ($43,805), on a bare natural bank with no existing structure to demolish. Signed contract; the material quantities and the EGLE permit fees are in the 140 ft Kimble Lake riprap seawall case study.
Seawall pricing is quoted per linear foot, and a handful of factors move that number up or down. The calculator above accounts for the big ones; here's what's behind the range:
| Material | Typical cost / LF | Best for | Typical lifespan |
|---|---|---|---|
| Marine-grade vinyl | $200–$450 | Low-maintenance freshwater & mild coastal shorelines | 40–50+ years |
| CCA treated timber | $150–$350 | Budget projects, sheltered low-energy banks | 20–30 years |
| Steel sheet pile | $300–$600 | Tall walls, high wave-energy & commercial sites | 30–50 years |
| Concrete | $350–$650+ | Maximum lifespan, surge- & hurricane-exposed coasts | 50+ years |
| Riprap rock armor | $150–$350 | Wave-energy dissipation, gentle natural slopes | 20–40 years |
Ranges are a baseline from real projects. The calculator's live number is adjusted for your wall height, so it lands inside these full-material ranges rather than matching the endpoints. Switch the calculator's water type to “Saltwater” to add a coastal adjustment; tidal, surge-exposed and brackish sites are confirmed after a site review.
Steel sheet pile seawalls run $300–$600 per linear foot installed, the second-highest material after poured concrete. The premium buys section strength: steel takes wave slam, boat wake and deep-water surcharge loads that would flex a vinyl panel, and it drives through dense or gravelly soil that stops lighter sheets.
Steel earns its price on open bays, commercial frontage, deep water and walls above about six feet of exposed height. On a sheltered freshwater bank it is usually overbuilt — the same money spent on vinyl plus a riprap toe buys more shoreline. In saltwater, budget for coatings or heavier gauge: corrosion, not load, is what ends a steel wall early.
Marine-grade vinyl sheet pile seawalls cost $200–$450 per linear foot installed. Vinyl does not rot, rust or feed marine borers, so it carries the lowest lifetime cost of the panel materials — the reason it is the most-requested seawall face we install.
What moves a vinyl wall inside that range is panel section and wall height, not brand: taller exposed walls need a heavier profile and deeper embedment, and a tie-back anchor system once the exposed face passes roughly four feet. Vinyl is the default choice on freshwater lakes and sheltered bays; where wave energy is genuinely high it is paired with a riprap toe rather than replaced with steel.
The per-foot range covers the seawall structure itself — face panels or sheet pile (or a poured concrete face), batter and tie-back anchors, a riprap toe where specified, and the cap. It excludes demolition of an old wall, backfill, drainage, permits and mobilization, which are quoted as separate line items because they depend on site conditions.
This is why a quoted job total is rarely the per-foot rate times the footage. Ask for the line items; any estimate that will not separate them is hiding one of them.
Seawall repair runs $120–$350 per linear foot, against $150–$600 per linear foot for full replacement. Cap repairs, tie-back replacement, joint sealing and filling voids behind the wall sit at the low end; a leaning wall that has lost its anchors sits at the top, and often is not worth repairing at all.
The practical threshold: if repair costs more than about half of replacement, replace. A wall that is rocking, bowing, or losing soil through open joints has usually lost the anchor system, and patching the face buys a season or two. We have published the arithmetic on a real job — see the 100 ft Wonder Lake repair-versus-replacement case study.
Riprap armor stone runs $150–$350 per linear foot, against $200–$650+ for a vertical wall — so on a bank that can accept a slope, rock is normally the cheaper answer, and it dissipates wave energy instead of reflecting it back at the shoreline.
The trade-off is land and depth: riprap needs a slope to sit on, so it eats several feet of usable shoreline and cannot hold a vertical edge for a dock or lawn. Where the bank is already steep, the property line is tight, or you need water depth at the wall, a vertical face wins despite the higher per-foot price. On high-energy sites the two are often combined — a vertical wall with a riprap toe.
Explore detailed pricing: seawall construction & cost guide, Galveston Island seawall cost, bulkhead cost, compare all our cost calculators, or browse our completed waterfront projects.
Honest answers about seawall pricing — what a wall costs per foot, how it differs from a bulkhead, why coastal jobs cost more, when a riprap toe helps, and what this estimate covers.
A seawall typically costs $150 to $650+ per linear foot installed, depending on material, wall height and wave exposure. Typical ranges are CCA timber $150–$350, marine-grade vinyl $200–$450, steel sheet pile $300–$600, concrete $350–$650+, and riprap rock armor $150–$350 per linear foot. Multiply the per-foot rate by your shoreline length for a project ballpark. For local pricing examples, see seawall cost in Galveston Island, Fox Lake, across Texas and Illinois.
Both are hard vertical shoreline walls, but a bulkhead mainly retains soil on calmer, low-to-moderate energy banks, while a seawall is built to take a beating — coastal bays, the open Gulf, busy boating lakes and storm surge. Seawalls lean on deeper embedment, heavier hardware, and often a riprap toe to absorb wave energy. If your site sees real wave or wake action, you want seawall-grade construction; for a sheltered inland bank, a bulkhead is usually enough.
Saltwater, brackish and tidal sites need site-specific wave engineering, corrosion-resistant materials and heavier hardware, plus the bigger wave and surge loads of open water — so coastal seawalls cost more than the freshwater baseline. Switch the water type to “Saltwater” and the calculator adds a coastal adjustment to the baseline; your final coastal price is confirmed after a site review.
On higher-energy shorelines, a riprap toe — armor stone placed at the base of the wall — absorbs and dissipates wave energy before it scours the foundation, and it can extend the life of a vinyl, steel or concrete face. Whether it's worth the added stone and placement cost depends on your wave exposure and water depth, which is one of the things we confirm on a site review.
It's a planning ballpark, not a binding quote. The ranges come from real seawall projects and are adjusted for your material and wall height. The firm price comes after a site review of soil, access, wave exposure and water conditions — estimates are reviewed by Roman Ross, Marine Construction Estimator at Shore Protect Construction.
The ranges in this calculator come from estimates on jobs like these:
Shore Protect