Dock Boxes

A dock box turns wasted slip space into secure, dry storage for lines, fenders, life jackets, cleaning gear, and everything else that otherwise ends up scattered across the deck or hauled back and forth from the house.

Dock Builders Supply carries fiberglass dock boxes built for real marine exposure: UV-stabilized gelcoat, marine-grade stainless hardware, gasketed lids, and hasps for a padlock. Sizes range from compact residential boxes up to long marina-grade units, in white and beige to match most docks.

Many owners mount a Newport Harbor Mate power unit directly to the box, and pair it with dock cleats and a fish cleaning station to finish out the slip. Browse sizes below or call for freight quotes on larger boxes.

This collection is part of our full Dock Accessories lineup.

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Over 10,000 marine-grade parts
Free material estimates and drawings
Ships within 1 business day from our USA warehouse.
30 years in business

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