Marine Construction Services

At Coast Seawall Dock & Boatlifts, we have been delivering professional marine construction services in Florida since 1979. With expert construction for over 45 years in seawalls, docks, boat lifts, rock revetments and more, our team is committed to safeguarding your investment with precision and durability.

Expert construction for over 45 years in seawalls, docks, boat lifts, dredging, rock revetment, retaining walls, and so much more…

About Our Marine Construction Company

Coast Seawall Dock & Boatlifts is one of South Florida’s leading professional marine construction companies specializing in both residential and commercial marine construction. Mike Duncan founded the company as “Duncan Seawall” in 1979 and it is now named Coast Seawall Dock & Boatlifts. We have over 45 years of experience and have grown to a full service coastal and marine construction firm. Our goal is to meet your every need.

What Our Marine Construction Company Does

Whether you need a seawall, dock, boat lift, rock revetment (riprap), or a retaining wall, Coast Seawall Dock & Boatlifts is here to meet all your needs. Serving customers since 1979, Mike Duncan (owner/contractor) has the knowledge, experience, and expertise needed to tackle any marine construction project.

Coast Seawall Dock & Boatlifts will answer questions and guide you step-by-step through your waterfront project, from permitting to the finished product. You can trust that we are committed to using the highest quality materials available, at the best possible value. We have high standards and brand integrity. We use time-tested, proven processes and settle for nothing less than impeccability. Above all, we recognize that it is a privilege to assist you in making your marine construction dreams a reality.

Our Marine Construction Services

SEAWALLS

We build seawalls that can withstand the elements. If you’re a homeowner seeking shoreline protection or a business requiring large-scale coastal marine construction, we are the seawall contractors you can count on.

DOCKS

We build quality, custom docks using the highest quality materials and craftsmanship

BOATLIFTS

We install customized lifts from 1,000 to 60,000 lb. capacity and are here to work with your budget.

ROCK REVETMENTS

Coast Seawall Dock & Boatlifts has over 45 years of experience in installing rock revetments (rip rap)

DREDGING

From the smallest residential dredge job to the most extensive commercial dredge, Coast Seawall Dock & Boatlifts has you covered

Why Choose Coast Seawall Dock & Boatlifts?

Your property deserves the highest level of protection and craftsmanship. Here’s why clients across Florida choose our marine construction company:

Proven Experience – Founded in 1979 by Mike Duncan, we’ve successfully completed thousands of seawall construction and repair projects, delivering unmatched expertise.
Licensed & Insured – As a fully licensed and insured marine construction company, we strictly follow Florida’s state and local permitting requirements for compliance.
Quality Materials – From vinyl sheet piling to reinforced concrete, we use only the strongest, most durable materials designed for long-term coastal performance.
Comprehensive Services – Offering everything marine construction related including new seawalls, docks, boatlifts, and rock revetments as well as seawall maintenance, dock
Customer-Centered Approach – We prioritize your satisfaction, guiding you step-by-step throughout the project with clear communication, transparency, and personalized professional service.

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Testimonials

All the guys at Coast Seawall are amazing. They have done several jobs for me and they could not have turned out better. I highly recommend them to all of my friends that live on the water. A++++++

Coast Seawall recently build both our seawall and dock in Boynton Beach. Mike Duncan and his team are top notch professionals and have excellent craftsmanship. The dock and wall gets great compliments from everyone who has seen it, including a number of general contractors who live in the neighborhood. Great job Coast Seawall. Can't thank you enough.

Very professional and dependable! They were recommended to me by a neighbor and I have used them for both dock and boat lift with great results.

My newly purchased home in Lantana had a backyard sloping very steeply into the canal. After researching seawall alternatives, I decided on rip-rap. Coast filled in my yard several feet deep to level it, put in beautiful rip-rap, and installed a dock. They were extremely punctual and professional. They delivered exactly what they promised, at the times promised. It has been two years, and the dock and seawall look exactly as installed. The dock pilings are very solid, even though our canal, (supposedly 4 foot deep), is deep in muck and they had to go down 9 feet to find solid footing! (And there was no mention of additional cost for driving the pilings much deeper than our survey suggested.) It was such a pleasure dealing with such professionalism, so unusual in my experiences with Florida companies!

We could not be happier. Coast Seawall did excellent work in an extremely professional manner when installing a rock revetment at our home on the ICW. The job was complicated by the fact that the only access was though our neighbor's yard. Coast kept them informed and protected their property every step of the way. We previously used them for a dock which we love and will use them again for any of our waterfront projects. Thank you Coggin and Mike! Ilene and Bob Boorman

Coast Seawall..., backed by the experience of Mike Duncan, constructed a rock wall, Azek deck & Deco boat lift at my residence in Captain's Key. Everything was constructed with the upmost attention to detail. I also appreciated their guidance through the process. Well done Coast team!

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Frequently Asked Questions

What is included in your marine construction services?

Our marine construction services cover seawall construction and repair, docks, custom boat lifts, rock revetments, and retaining walls serving both residential and commercial clients across Florida with reliable expertise.

How long does a seawall typically last?

A well-constructed seawall built with premium materials can last 30–50 years. Routine seawall maintenance, periodic inspections, and timely repairs further extend durability, ensuring long-term shoreline protection for your property.

Do you handle permitting for seawall construction in Florida?

Yes, we manage all required state and local permitting for seawall construction projects. Our licensed seawall construction company ensures full compliance, providing clients with a stress-free and seamless experience.

What are the signs I may need seawall repair services?

Signs include cracks, soil erosion, leaning or bowing walls, rust stains, and water seepage. Addressing these early with professional seawall repair services prevents further property damage and costly repairs.

Do you offer seawall maintenance programs?

Yes, our seawall maintenance programs include detailed assessments, preventative care, and minor repairs. These services help prolong your seawall’s lifespan, safeguard property value, and reduce long-term repair expenses significantly.

Can you customize boat lifts based on my vessel size?

Absolutely. We design and install boat lifts ranging from 1,000 to 60,000 lbs. Each lift is tailored to suit your vessel’s needs and budget requirements. The boatlift manufacturers typically build boatlifts for different vessel weight ranges. We can add customizations including tailored bunks, walkboards, stairs, etc.

What materials do you use for seawall construction?

We construct seawalls using durable, long-lasting materials including vinyl sheet piling, reinforced concrete, and aluminum or steel tie-back systems. These materials are carefully selected for strength, longevity, and superior performance in Florida’s coastal environment.

Do you provide services for both residential and commercial marine projects?

Yes, we provide comprehensive services for homeowners needing shoreline protection and businesses requiring large-scale coastal marine construction. Our expertise ensures tailored solutions for every type of waterfront project.