[14][15] The Lagoon 450 is a recreational catamaran, built predominantly of polyester fiberglass sandwich, with wood trim.

The hulls have slightly raked stems, reverse transoms with swimming platforms, dual internally mounted spade-type rudders controlled by a wheel and twin fixed fin keels.

The three-cabin "owner's" layout has a single cabin in the starboard hull with a double island berth aft, a lounge and storage amidships, and a large head and shower forward.

They hit the sweet spot for the charter market (2+ families on board), and they have managed to appeal to owner-operator cruisers as well.

"[10] In a 2011 Sail Magazine review, Tom Dove wrote, "the wind at Annapolis was disappointing, but the big Lagoon’s performance was not.