Skip to content
Need a Renovation Cost Estimate?

How Much Does A Seawall Cost?

Get your renovation costs using Renotag's renovation cost calculator:
Key TakeawaysDetails
Cost per Linear Foot$150 – $600
Average Cost for 100 feet$15,000 – $60,000
Materials Impact CostsVarying costs for steel, vinyl, concrete, wood, riprap
Maintenance CostsRegular inspection and repairs are crucial
Hiring ProfessionalsEssential for cost estimation and quality assurance

Building a seawall is a significant investment, vital for protecting coastal properties from erosion and storm damage. Below, we detail the costs involved, from initial construction to ongoing maintenance.

Seawall Cost Per Linear Foot

Seawall construction typically ranges between $150 and $600 per linear foot. This variation depends on the materials used, the complexity of installation, and site-specific factors.

Average Cost To Build A 100′ Seawall

For a standard 100-foot seawall, the average cost ranges from $15,000 to $60,000. This estimate includes both labor and material expenses.

Seawall Cost

The total cost of a seawall can vary greatly depending on its length. Below is a detailed table of average costs based on seawall length:

Length (feet)Average Cost
25′$3,800 – $15,000
50′$7,500 – $30,000
100′$15,000 – $60,000
150′$22,500 – $90,000
200′$30,000 – $120,000

Average Seawall Construction Cost

On a national level, the average seawall construction cost is as follows:

National Average Cost$35,000
Minimum Cost$5,000
Maximum Cost$100,000
Average Cost Range$15,000 to $60,000

Bulkhead Or Seawall Cost Per Foot

Different materials affect the cost of a seawall. Here is a comparison of costs per linear foot based on the material:

MaterialCost per Linear Foot
Steel$200 – $600
Vinyl$200 – $550
Concrete$200 – $600
Wood$150 – $500
Riprap Rocks$50 – $200
Living Shoreline$50 – $350

Steel Seawall Cost

Steel seawalls are among the most durable, ranging from $200 to $600 per linear foot. They are highly resistant to corrosion and impact, making them suitable for areas with severe weather conditions.

Vinyl Seawall Cost

Vinyl seawalls typically cost between $200 and $550 per linear foot. Vinyl is a popular choice due to its resistance to rust and lower maintenance needs compared to steel.

Concrete Seawall Cost

Concrete seawalls, ranging from $200 to $600 per linear foot, provide excellent durability and are ideal for protecting properties from strong tidal waves.

Wood Seawall Cost Per Foot

Wooden seawalls cost about $150 to $500 per linear foot. While more aesthetically pleasing, wood requires significant maintenance to prevent rot and pest infestations.

Riprap Rock And Boulder Seawalls

Riprap rock and boulders, costing $50 to $200 per linear foot, are natural and provide excellent erosion control. They are particularly effective for lakefront and riverbank applications.

Living Shoreline Cost

Living shorelines range from $50 to $350 per linear foot. They use natural elements like plants and rocks to stabilize the coastline, providing an eco-friendly erosion control method.

Cost Factors To Build A Lake Seawall Or Bulkhead

Several factors influence the total cost of building a seawall. Here is a table that outlines the different types of seawalls and their respective costs and factors:

Seawall TypeCost per Linear FootNotes
Standard$150 – $400Easy access, shoreline work, reinforcing old seawalls, vinyl, wood, or riprap walls, riverside or lakeside installs
Medium$400 – $600Basic replacement, limited land access, need for obstacle clearance, working from water barge, steel, reinforced vinyl, or concrete
Complex$600 – $1,000Complex replacements, hard-to-access areas, significant backfill requirements, clay or rocky soil, open-ocean exposure, combinations of riprap with steel or concrete

Truline Seawall Cost

Truline seawalls incorporate both concrete and vinyl for enhanced durability and flexibility. Costs can vary significantly, often falling within a higher price range due to the premium materials involved.

Seawall Maintenance, Repair, And Replacement Costs

Ongoing maintenance and timely repairs are crucial for extending the lifespan of a seawall. Here is a table summarizing common maintenance tasks and their average costs:

MaintenanceAverage CostDescription
Seawall Inspection$200 – $600Marine structural engineers should check seawalls for damage every 5-6 years or during real estate transactions
Seawall Repairs$100 – $250 per linear footIncludes fixing minor cap cracks, installing new concrete caps and tiebacks, grouting joints, installing secondary anchors, and soil stabilizations
Seawall Replacement$150 – $600 per linear footInvolves repairing leaning walls, joint separation, toe and berm failure, drainage system installation, and significant damage repairs

Seawall FAQs

How Much Does A Seawall Cost In Michigan?

In Michigan, seawall costs can vary based on local conditions and material choices. Generally, costs align with the national average, with added considerations for lake water levels and seasonal changes.

What’s The Difference Between A Bulkhead And A Seawall?

Vertical retaining wall structuresLong and curved structures
Only resist small wavesProtect from large tidal waves
Steep slopeOn top of long shallow slopes
Common for marinas, lakeshores, riversCommon for city coastlines, beaches, bays
Made of steel, wood, concrete, aluminum, vinylMade of reinforced concrete, steel, riprap
Primarily for private residencesPrimarily for public coastal regions
Have French drains for rainwaterHave weep holes and drainage systems

How Long Does A Seawall Last?

The lifespan of a seawall varies by material. Here are estimated lifespans:

Seawall MaterialLifespan (Years)
Steel25 – 35
Vinyl50 – 60
Concrete Wall Slabs30 – 50
Wood10 – 40

How Deep Should A Seawall Be?

The depth of a seawall depends on local conditions, including wave action, soil type, and coastal erosion. Typically, a seawall should extend several feet below the seabed to ensure stability.

Are Seawalls Effective?

Yes, seawalls are effective at protecting coastal properties from erosion and storm surges, although their effectiveness can be influenced by construction quality and maintenance.

Hiring A Seawall Installation Or Repair Contractor

Hiring a skilled contractor is essential for the effective installation or repair of a seawall. Professionals can provide accurate cost estimations, ensure quality work, and obtain necessary permits.

Questions To Ask

When hiring a contractor, consider the following questions:

  1. What experience do you have with seawall construction?
  2. Can you provide references from previous projects?
  3. What materials do you recommend for my specific site?
  4. What are the projected costs and timelines?
  5. Do you offer any warranties or guarantees on your work?
  6. What is included in the maintenance plan?

Properly planning, constructing, and maintaining a seawall can significantly extend its lifespan and protect valuable property from the forces of nature. Consult with professionals and conduct thorough research to ensure the best outcomes.

Renotag's renovation cost calculator being used by a person to price their home renovation costs.
social proofs renotag
5K+ homeowners trust Renotag

Your renovation cost is waiting

The world's first renovation cost calculator.

Table of Contents

Calculate your reno price

Add your project details, choose your finishes, and get a price for your project – no contractor needed until construction time.