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Seawall Repair Cost: Calculate your Project

Discovering the cost of seawall repair is essential for property owners and marine contractors seeking to protect their investments.

In this article, we will delve into the intricacies of seawall repair costs, exploring factors such as the type and extent of damage, the age of the structure, and job site accessibility.

With over 30 years of combined experience, our experts from PileMedic offer expertise in navigating these complexities.

Whether you reside in Alaska, Arizona, or South Florida, understanding seawall repair costs is crucial for safeguarding your property.

SPiRe+ installed on corroded seawall or bulkhead

Estimate the cost of your Seawall Repair Project

A seawall cost calculator is a useful tool for estimating the expenses associated with repairing or constructing a seawall. This calculator takes into account various cost factors such as the size of the project, miscellaneous materials, and grout.

It provides an accurate estimate of the seawall repair cost, so property owners like you can plan your budget accordingly.

Seawall Cost Estimator

Seawall Cost Estimator

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Labor Considerations:

The labor component for seawall repairs is contingent on the method employed (divers or waders) and is subject to variations based on job location, including factors such as union affiliation and local cost of living.

A standard 4-man crew is estimated to cover 15-20 square feet per hour.

What Goes Into Seawall Repair Costs

Factors such as the size of the project, extent of damage, location, and type of repair needed significantly impact seawall repair costs.

The size of the seawall is an important consideration, with smaller residential seawalls costing around $15,000 to repair, while larger commercial seawalls can cost upwards of $1,000,000 or more.

Another factor is the severity of the damage. Minor cracks or small areas of missing concrete resulting in lower repair costs, while widespread or structural damage will increase the cost.

Location can affect the cost as well, with remote or difficult-to-access areas requiring additional logistical support.

Finally, the type of repair required, whether it’s cosmetic repairs or a complete rebuild, will also impact your overall cost.

It is important to get an inspection to determine the scope of work and obtain an accurate quote from a marine contractor for estimated cost of repair.

Average seawall construction cost

The average cost of constructing a seawall can vary depending on various factors such as location, materials used, and accessibility. When considering the average seawall construction cost, it is important to take into account:

  1. Length and Height: The longer and taller the seawall, the more materials and labor are required.
  2. Materials: The type of materials used, such as vinyl, aluminum, or steel, can significantly affect the overall cost.
  3. Soil Conditions: Harder soil may require more labor and materials, leading to increased costs.
  4. Environmental Factors: Weather, governmental regulations, and local ordinances can impact the cost of construction.
  5. Project Complexity: More complex projects, such as those in difficult-to-access areas, may require additional planning, materials, and labor.
  6. Accessibility: The ease of access to the construction site for equipment and materials can influence the cost, with more accessible sites generally incurring lower costs.
  7. Permitting Costs: Costs associated with obtaining the necessary permits for the construction of the seawall.
  8. Shoreline Characteristics: Factors such as the type of water (saltwater or freshwater) and the nature of the shoreline (rocky or sandy) can impact the cost of construction.

Frequently Asked Questions

What is the lifespan of a seawall?

The lifespan of a seawall can vary depending on factors such as maintenance, material, and quality of installation. According to various sources, a properly maintained seawall can last between 30 to 50 years, with some types such as vinyl seawalls potentially maintaining a lifespan of up to 50 years123

The material used and the quality of installation can significantly impact the lifespan, with concrete and vinyl seawalls lasting between 30-50 years and steel seawalls lasting an average of 35 years, potentially longer if galvanized. Poor installation, maintenance, and environmental factors can reduce the lifespan of a seawall. The average lifespan of a seawall can range from 50 to 60 years, depending on build quality and location

How often do the sea walls need to be repaired?

The frequency of seawall repairs can vary based on factors such as maintenance, material, and environmental conditions. Properly maintained seawalls can last 30-50 years, while poorly installed ones may need repairs 10-15 years sooner. The American Society of Civil Engineers recommends inspecting coastal structures, including seawalls, at least once every 5 years to identify signs of deterioration and prevent rapid acceleration of damage4.

What are the most common causes of seawall damage?

Soil Erosion: Incoming tide water can push against a seawall and cause soil erosion, weakening the structure over time.
Inadequate Maintenance and Inspections: Poor maintenance and lack of inspection to detect problems early can lead to corrosion and decomposition of the seawall, reducing its strength over time.
Seismic Activity: Seismic activity can compromise a seawall, causing damage usually in the form of cracking, which the saltwater will seep through, exacerbating the corrosion process.
Natural Disasters: Areas susceptible to hurricanes can experience seawall damage due to powerful winds eroding soil from the back of the seawall, creating sinkholes and voids.
Corrosive Nature of Marine Environments: Marine environments expose seawall materials to harsh, corrosive conditions, leading to seawall failure

Do sea walls require maintenance?

Sea walls require maintenance to ensure their longevity and effectiveness in protecting coastal areas. According to experts, regular inspection by qualified professionals is recommended every 5 to 6 years to ensure proper maintenance

How deep should a seawall be?

The ideal depth of a seawall depends on its height and the force of the waves. For example, a concrete seawall should be 8 to 20 feet deep, depending on the force of the waves, the materials used, and building codes.

What Is the Average Cost of Constructing a New Seawall?

The average cost of constructing a new seawall can vary depending on various factors such as materials, length, and location. A seawall costs $150 to $600 per linear foot or $15,000 to $60,000 for the average residential project. Building a seawall in a commercial or high-erosion zone costs $700 to $2,000 per linear foot.


  1. Gibson Marine. (2012, January 25). “How to Know When Your Seawall Needs Repair or Replacement.” Retrieved from
  2. Stokes Marine. “Seawalls.” Retrieved from
  3. Perfection Seawalls. “The Lifespan of a Seawall.” Retrieved from
  4. Cummins Cederberg. “Guidelines for Seawall Maintenance.” Retrieved from