Waves crash against a break wall in conjunction with high tide and a storm.

One of the biggest concerns facing coastal communities all over the world is the increasing number of hurricanes and tropical storms. And while there are many ways to try and prevent these catastrophes from happening, one of the most cost-effective solutions might be building a seawall. In this article, we’ll take a look at how much it costs to build a seawall and find out which coastlines are the best candidates for this type of protection.

What is a Seawall?

A seawall is a structure that helps protect coasts from erosion. It’s typically made of concrete, stone, or steel and can be as long as a few hundred meters or even kilometers. Seawalls can also vary in height, from a few feet to over 30 feet.

The cost of building a seawall varies depending on the location and type of seawall being constructed. For example, a concrete seawall will typically cost more than a stone or steel seawall. Additionally, the length of the seawall and its height will affect the cost. A short, low-height seawall will likely cost less than a taller, higher-height seawall.

Types of Seawalls

There are a few different types of seawalls that can be built to protect shorelines from erosion and flooding. The most common type of seawall is the revetment wall. Revetment walls are constructed from sea sand, rocks, or concrete and are designed to prevent waves from eroding the coastline.

A second type of seawall is the jetties. Jetties are a series of connected poles designed to redirect water away from the shoreline. They can be made out of concrete, steel, or wooden materials and can be used to provide protection against wave action as well as storm surges.

The final type of seawall is the riprap wall. Riprap walls are composed of large boulders that have been placed in front of the coast to prevent erosion and flooding. They are usually built along beaches that are vulnerable to high seas and strong waves.

Materials and Costs

Materials and costs for building a seawall can vary depending on the location, type of seawall, and construction methods. For example, a concrete seawall usually requires less material than a sand or stone wall.

A seawall can cost as much as $1 million to construct, but the average cost is about $250,000. The main materials used in construction are concrete, sand, rocks, and steel rebar. Additional expenses may include labor costs, permits, and sprinkler systems.

Size of a Seawall

When it comes to protecting your coastline, a seawall is a great investment. Seawalls can help guard against coastal erosion, provide a natural barrier against storm surges and hurricanes, and reduce the amount of noise pollution caused by waves crashing onto the shore.

Depending on the location, size and complexity of the project, building a seawall can cost anywhere from a few thousand dollars to tens of millions of dollars. To find out how much Seawall construction will cost to build your perfect seawall, you can consult with experts at Coast Seawall Dock & Boatlifts, who’ll provide you with estimates for eight different coastal locations in North America.

Here are the costs for building a seawall in each location:

  1. Eastern Long Island – $8.7 million
  2. North Carolina’s Outer Banks – $10.5 million
  3. Santa Cruz County, California – $12 million
  4. Cape Cod – $15 million
  5. The Outer Banks of North Carolina – $24 million
  6. The Gulf Coast of Texas – $30 million
  7. Massachusetts’ New Shoreham Bay – $37 million
  8. Seattle’s Ship Canal – $45 million


If you’re interested in building a seawall to protect your property or community from rising sea levels, there are many factors to consider. In this article, we provide an overview of the various costs associated with seawall construction and give you some insights into which options might be best for you. We also include a detailed cost breakdown so that you can get a more accurate idea of how much it will Actually Cost You. So whether you’re looking for simple information or expert advice on building a seawall, visit our website today!


You may also like

Leave a Reply