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Downtown Sarasota bay marina jacks marine construction

Commercial Marine Contractor

Work With an Experienced Marine Contractor

Duncan Seawall is well known throughout Southwest Florida for their excellent marine contractor services. As we have built our resume and grown our business, we are one of the few contractors able to take on large commercial projects in addition to our residential services.

Contact Us About Your Project Today

Why Choose Duncan For Your Commercial Project


Large Scale

Our ability to offer large scale bonding to our customers means protection no matter the size of the project



Duncan's longstanding reputation for quality sets a high bar that we strive to meet everyday and for every project


In House

Whatever equipment you needed, we have. From cranes to barges, we have everything we need to tackle any size project


40 Years
of Service

We have over 40 years of experience providing services like repairs and inspections to keep you satisfied over time

Trusted Dredging Services

From the small residential boat slip maintenance dredge to the 1.2 million cubic yard Army Corps of Engineers Intracoastal Waterway dredge, Duncan Seawall should be your contractor of choice! With over 40 years of experience, Duncan Seawall has the knowledge and personnel to plan, permit and facilitate your dredging project.

We use land and barge-based track hoes (long, mid and standard reach), draglines and clamshells for mechanical dredging, as well as pumping equipment of various sizes for hydraulic dredging. Duncan Seawall has the necessary equipment to complete any size project efficiently while maintaining a clean working environment in the process.

Featured Mechanical Dredging Projects:

  • City of Tampa (Westshore Waterways) ,Tampa, FL
  • Riviera Dunes Marina, Palmetto, FL
  • Tampa Bayside Marina, Tampa, FL
  • Marina Jack, Sarasota, FL
  • Davis Island Yacht Club, Tampa, FL
  • Field Club, Sarasota, FL
  • Longboat Key Moorings, Longboat Key, FL

Featured Hydraulic
Dredging Projects:

  • Sawgrass Lakes, St. Petersburgh, FL
  • The Inlets Development, Bradenton, FL
  • Hawks Harbor, Bradenton, FL
  • Bombardier/Seadoo Test Facility, Melbourne, FL
  • Ryland Home Corp, Orlando, FL
  • Florida Silviculture, Perry, FL
  • Matheny Creek, Sarasota, FL

Take A Look At Our Work

With unlimited bonding and our array of equipment and manpower, no project is too big for our team. From marinas to baseball stadiums, take a look at our work.

View more featured commercial projects
Bird Key Yacht Club in Sarasota Florida
Bird Key Yacht Club

The Bird Key Yacht Club is an esteemed and luxury private club in Sarasota, Florida. To maintain their luxury brand they decided it was time for a face-lift. This face-lift would entail a new composite sheet piling seawall and complete dock reconstruction, spanning 10,648 square-feet. This project also included some dredging to increase the marina's depth to accommodate larger vessels as well as all new marina utilities including electric, plumbing, fire and fueling dock, and the addition of many new boat lifts.

Lecom Park - Pittsburgh Pirates spring training outfield deck
Lecom Park Boardwalk

We’ve built a reputation for excellence, which led to being selected to work on the Lecom Park Boardwalk in Bradenton. This project required us to complete more than 22,000 square feet of boardwalk before the Pittsburgh Pirates returned for spring training. It required some aggressive scheduling to complete the entire project, including pilings, decks and an outfield tiki bar, it was occupancy-ready in less than 100 days.

Blackburn Point in Sarasota, Florida
Blackburn Point

Blackburn Point is a Sarasota County park which includes over 1,500 square feet of docks, launches for kayaks and boats, as well as fishing piers and boardwalks. During the dredging process, we removed more than 1,000 cubic yards of material. Sourced as a bid job, we were happy to be selected, and consider this project a great success for Duncan Seawall.

Tidewater Preserve in Bradenton
Tidewater Preserve

Constructed 5,260 Sq. Ft marina expansion, adding a total of 30 slips with accompanying boat lifts.  Duncan Seawall was responsible for driving piles, substructure, composite decking, as well as all electrical aspects of the marina expansion.   Duncan was selected due to its large employee base as well as the in-house electrical department for a seamless project.