A corner box is a right triangle that fills the corner where a finger pier meets the main dock, space a rectangular box would block. It holds about half of what a rectangular box with the same outside measurements does, which is how its size is scored here.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Best Corner Dock Boxes: Under 18 cu ft
- DoxBox Fiberglass Triangle#1 of 3Full review
A fiberglass corner box with vents and soft-close arms, for less than Taylor Made’s corner model.
Amazon $699$69913.1 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Corner#2 of 3Full review
A fiberglass corner box that uses the dock gusset, space a rectangular box can’t. You pay for that fit.
Amazon $1,099.95$1,099.9513.9 cu ftFiberglassGas supports - Taylor Made Stow 'n Go Poly Triangle#3 of 3Full review
A polyethylene corner box that fits a dock gusset and can sit around a power pedestal, for much less than fiberglass.
Amazon $649.71$649.7116.7 cu ftPolyethylene-
