Design and Construction
The 450 is built predominantly of polyester fiberglass sandwich with wood trim, carrying slightly raked stems and reverse transoms with swimming platforms. Its twin fixed fin keels and dual internally mounted spade-type rudders controlled by a wheel give the platform a predictable footprint, though the skeg keels are a lethal weapon in tidal areas or in coral. The SporTop evolution demanded substantial technical and ergonomic modifications that influence the boat's behavior and use, and a 2015 remodeling introduced a rib at the forward end of the hull. The yard also used the new version to launch a partially re-styled interior across both flybridge and SporTop models.
Rig and Handling
The catamaran carries a fractional sloop rig with a deck-stepped mast, two sets of swept diamond spreaders, and aluminum spars with 1X19 stainless steel wire rigging. On the SporTop, the boom sits 70cm lower yet the sail area remains the same as the flybridge version. Tested from La Rochelle to Arcachon on a 117-mile delivery, and later in an autumn gale, the SporTop helm showed itself practical and comfortable, with excellent feedback from the helm and efficient rudders. In challenging conditions the 450S confirmed the same willingness the flybridge version had shown in lighter weather, and in light airs the SporTop benefits from a big overlapping Code 0 in D4 membrane. Access to the mast via a flight of steps directly from the helm station is nice and safe.
Accommodations
The design sleeps six to eight people in three or four cabin interiors. The three-cabin owner's layout places 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, while the port hull holds cabins fore and aft with two private heads between. The four-cabin charter configuration repeats the two-cabin arrangement in both hulls. The central salon has an L-shaped settee and navigation station, and the galley to port is U-shaped with a four-burner stove, refrigerator, freezer and double sink. Aft, the cockpit lounge offers a U-shaped settee on the port side, and the boat may be steered from the nav station using the autopilot.
Known Issues
In March of 2021 Lagoon admitted a problem with forward bulkheads having a weak point in construction that may crack, and owners were offered a free inspection, with repairs managed case by case based on warranty or vessel history. Beyond the bulkhead advisory, the skeg keels remain a hazard where tides or coral expose them.
The Verdict
The Lagoon 450 is a high-volume cruising catamaran that translated charter practicality into a platform families could own and sail without professional crew. The SporTop variant refined the helm experience close to the saloon, and the broad interior tolerances make liveaboard life easy. The bulkhead advisory is a real ownership consideration, but the free inspection program gives buyers a defined path to verify condition.
Pros
- SporTop helm brings steering close to the main living area with safe mast access
- Efficient rudders and good helm feedback in lively conditions
- Three- and four-cabin layouts suit both owner and charter use
- Large U-shaped galley and L-shaped salon settee
Cons
- Forward bulkheads may crack at a known weak point
- Skeg keels are hazardous in tidal or coral waters
- 450 F production ended in 2019; 450 S ended in 2021
