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Sarasota, Florida Dock Service

Custom Dock Builders

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Setting A New Standard in Custom Docks Since 1979

Whether you need a dock for your personal watercraft or a new 200 slip marina, Duncan Seawall has the experience and ability to build a dock you will be proud of for years to come. When constructing a dock, your material options are almost endless. The pilings, substructure, decking and fasteners can be customized to meet your specific needs and budget requirements. Duncan Seawall will assist you through the entire dock construction process. Several of our standard features include:

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Marine Grade Materials

We use 8” and 10” diameter, 2.5 C.C.A. marine grade pressure treated pilings for maximum strength and life expectancy


Our pilings are jetted a minimum of 6' into the bay bottom and then driven for maximum stability and to prevent settling

Large Selection of Colors & Styles

We have a wide range of decking colors and selections from brands like Trex and TimberTech (formerly Azek)

No Rusting or Lifting

Stainless steel screws are used to attach the decking with no rusting or lifting of the deck boards

Create a One of A Kind Custom Dock

Duncan Seawall offers a wide variety of accessories, options and add-ons for your brand new Dock. 

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  • Ladders
  • Bumpers
  • Cleats
  • Lights

  • Pile wrapping
  • Pile caps
  • Dock step downs
  • Handrail (Cable, P.T., Composite and Rope)

  • Slide Moor docking system
  • Fish cleaning tables
  • Dock storage boxes
  • Benches and chairs
  • Dipped and wrapped pilings

We Want to Make the Design Process as Easy as Possible

At Duncan Seawall, we want to make designing your new dock or deck as easy as possible. That's why we have a design center where you can come in and see all of our products for yourself. 

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Choose From a Wide Selection of Materials

Duncan Seawall has a wide range of decking from marine grade pressure treated decking, Trex Capped Composite Decking, TimberTech (formerly Azek) Composite Decking, Weardeck and beautiful IPE Hardwood. 

Take A Look At Our Work

Our 40 years of experience shows in our work. Take a look at some of our featured projects to see our expertise for yourself.

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Dock | Duncan Seawall