Lagoon Catamarans Model by Model: Which Years to Buy and What to Check

Lagoon catamarans: cruising catamaran at anchor near a lighthouse

Lagoon has built more cruising catamarans than anyone else, so most buyers will view at least one on the used market. This guide goes through Lagoon catamarans from the 410 to the 46: when each was built, what changed between series, the problems that are on record, and what to look at before you make an offer.

Last checked: November 2026. Production years come from Lagoon, the specialist press and reference databases, and sources sometimes differ by a year between debut, first deliveries and model year. Treat them as a guide and confirm the build year from the boat’s papers and hull number.

Where Lagoon comes from

Lagoon began in the mid-1980s inside Jeanneau’s racing department, Jeanneau Techniques Avancées (JTA). Lagoon now dates the brand to 1984. Boatnews.com, telling the story from the yard’s side, puts the start of JTA in early 1983. The first Lagoon, a 55-footer, was built to plans by Marc Van Peteghem and Vincent Lauriot-Prévost, whose firm is now VPLP Design. VPLP is still Lagoon’s naval architect; the Lagoon 46 and the Lagoon 55 are both its designs.

Production later moved to Bordeaux. Construction Navale Bordeaux (CNB), set up in 1987, was bought by the Beneteau Group in 1992. Lagoon says the 410 of 1997 arrived together with the brand’s move into the Beneteau Group. Because the brand started inside Jeanneau, some older paperwork and databases name Jeanneau as the builder. Lagoon says it has built more than 7,000 catamarans and around 40 models.

For a buyer, this means parts, dealers and surveyors who know the boats are easy to find. It also means many hulls went into charter fleets, which affects condition and price more than the model year does.

The models at a glance

Model	Built (approx.)	What changed or stands out
410 / 410 S2	1997–2006	About 283 built. The S2 brought the main halyard and reefing lines to the cockpit and added electric winches. 7.09 m beam.
380 / 380 S2	1999–2019	Lagoon’s 20-year model. The S2 (2003) got a bigger shower, revised galley and a double helm seat.
440	2004–2010	Over 300 built by Lagoon’s count. Spec sheets give large tanks for its size: 900 L water, 650 L fuel.
420	2006–2009	Launched September 2006 as a hybrid. Diesel versions were also sold. Multihulls World counts 179 built in three years.
421	2009–c. 2015	Revised 420: lower profile, lower fixed bimini, new aft underwater shape. Hybrid became an option.
400 / 400 S2	2009–2012 / 2012–2017	264 of the first series. The S2 got more saloon storage, the electrical panel moved to the chart table, and reworked cabins.
450 (later 450 F)	2010/11–early 2020	Flybridge. Lagoon’s first model to pass 1,000 sold. Forward bulkhead campaign (see below).
52 F / 52 S	early 2010s–c. 2021	Flybridge (F) or Sportop (S) versions; the Sportop was announced for summer 2015. Lagoon’s 40-year timeline lists the 52 under 2013. Replaced by the Lagoon 55 in 2021.
39	2013–2017	Nauta Design interior. Three- or four-cabin layouts, or two owner’s suites.
450 S	2015–c. 2020	Sportop: helm beside the saloon, no flybridge, hull chine for more cabin volume, mast nearly 3 ft shorter.
42	2016–	Mast moved aft, self-tacking jib. Lagoon now also sells a limited-edition 42 Millenium.
40	2017–	Builds on the 39 and 400 generations. Aft mast, self-tacking jib. Now in Lagoon’s “Heritage” range.
50	2017–2022	Sits between the 450 and 52. 3, 4 or 6 cabins. Succeeded by the Lagoon 51, which uses its hulls.
46	2019–	Replaces the 450. Mast further aft, black-water tanks under the sole. Restyled “Iconic” edition shown in 2025.

The early boats: 410, 380 and 440

The 410 is now old enough to be cheap. Lagoon’s own brochure gives 12.37 m by 7.09 m; an 8 m beam quoted on some websites does not match the builder’s figure or the specialist spec sheets. The S2 changes, especially the main halyard and reefing lines led back to the cockpit, are worth having.

The Lagoon 380 ran for two decades, so you can buy a 2003 boat or a 2019 one under the same name. Practical Sailor’s 2025 used-boat review liked how it handles under power and in moderate wind. The reviewer had complaints about the anchor chain, which runs exposed between the trampolines. Fuel and water are small, at 200 L and 300 L. The review reckons the water will last a week’s charter if everyone aboard is careful with it, but its own text and spec table disagree on whether there are one or two 300 L tanks, so check the boat.

On Rightboat in November 2026, most 380s from 2001 to 2006 were asking about $180,000–$220,000, and some 2016–2018 boats in the Caribbean were asking less than that. On this model, the boat’s history and condition decide the price more than the year does.

The 440 (2004–2010) is the forerunner of the 450. Its big tanks make it a better liveaboard boat than its age suggests.

The 420 and 421: the hybrid experiment

The 420 was launched in September 2006, and Cruising World called it the first production hybrid. In its hybrid form it had no propulsion diesels at all. Two electric motors, one in each hull, ran off a large battery bank, and a single diesel generator charged the bank, supplied the house circuits and powered the AC. Under sail, the freewheeling propellers acted as generators. Cruising World’s 2007 test found regeneration started at about 4.5 knots, which needed roughly 10 knots of wind, and said the large propellers slowed the boat under sail. Lagoon claimed about two hours of silent running at 6.5 knots.

The system had a difficult start. Yachting Monthly wrote in June 2007 that trials had been postponed several times while the control electronics were sorted out. On its own test day the system stopped because the generator’s cooling-water impeller had burnt out. That is the basic weakness of the layout: the generator is the boat’s only diesel, so if it stops, the boat can only motor until the batteries are flat.

The diesel 420 was sold alongside the hybrid. In late 2007 the Australian importer listed twin 40 hp diesel versions for slightly less money. Check which drive a 420 has; listings often don’t say.

The 421 followed in May 2009. Lagoon lowered the profile, fitted a lower fixed bimini that catches less wind and reshaped the aft underwater sections. The hybrid drive was still available as an option. Multihulls World calls the 421 a corrected version of the 420.

Checking a hybrid 420 or 421

Age and type of the propulsion batteries, with invoices. A tired propulsion bank is the most expensive item on the boat.
Generator hours and service records. On a hybrid it is the only engine.
Run both motors under load at the sea trial and watch whether the generator starts automatically when the batteries run down.
Ask whether the drive has been modified or converted, by whom, and whether the insurer and the survey know about it.

The 400 and 400 S2

The Lagoon 400 took over the 380’s market for buyers who wanted more room. The first series (2009–2012) had 264 boats. The S2 ran from 2012 to 2017. It got extra saloon cupboards, moved the electrical panel to the chart table to free space for a freezer, shuffled the berths and modernised the finishes. The changes are small, but an S2 is the easier boat to resell. Tankage is 400 L fuel and 300 L water. Spec sheets give twin Yanmars of 29–30 hp as standard and 40 hp as an option.

Many used 400s lie in Croatia and Greece. In November 2026, four 2010–2014 boats in Split and Attica were asking about $213,000. Boats of the same age in Texas, the BVI and Thailand were asking $330,000–$393,000. Condition, tax status and location explain the gap.

The 450: Lagoon’s best seller and its bulkhead problem

The 450 came out in 2010 with a flybridge helm, replacing the 440. SAIL dates the launch to 2011, which is probably the first model year. Practical Sailor puts production at about 1,100 hulls up to early 2020. In 2015 Lagoon added the 450 S (Sportop), and the flybridge boat became the 450 F. The S has its helm beside the saloon, slightly raised. Its rig is lower and nearly 3 ft shorter, and its hull mould has a chine that widens the hulls above the waterline. The flybridge keeps the cockpit clear of lines. The Sportop puts every line within reach of the helmsman, which suits short-handed crews better.

The forward bulkhead campaign

The problem came to light in 2020, when owners began reporting cracked or failed forward bulkheads on 450s, and Lagoon started its own analysis in March 2021. Practical Sailor reported in 2023 that by August 2021, 155 owners had contacted Lagoon and 50 boats were under repair or already repaired. Lagoon’s response was:

a free inspection of the forward bulkhead at an authorised dealer or service centre;
a repair kit and instructions, in which the cracked section is sandwiched between reinforcing pieces, like a splint;
the full cost covered inside the three-year warranty, and labour only after that, with the repair guaranteed for one year.

Lagoon says a damaged forward bulkhead is not a safety risk and cannot cause a dismasting. It listed too much sail, long spells motoring into a sea, groundings, over-tightened rigging and poor haul-outs as examples of “abnormal” use. Practical Sailor did not accept that as the explanation for most cases. It called the repair a band-aid and noted that Lagoon had reinforced the passageway beam on boats built after 2012 while calling that a routine production update.

Our advice: on any 450, F or S, have the surveyor open the headliners and panels around the forward bulkheads and the main beam. A boat that has had the documented Lagoon repair is a known quantity. If the boat has no paperwork and you can see filler or fresh paint in that area, ask the seller for an explanation before you go further.

The current generation: 39, 40, 42, 46 and 50

The Lagoon 39 (2013–2017) has a Nauta Design interior and was sold with three or four cabins, or with two owner’s suites, one in each hull. It is a compact boat for a couple who want an owner’s hull without paying for 42 ft.

The 40 and 42 brought in the layout that most current Lagoons use: the mast moved well aft, with a short boom, a tall main and a self-tacking jib. Tacking is easier and there is less mainsail to reef. The 42 had its world premiere at boot Düsseldorf in January 2016 (Lagoon’s own timeline files it under 2015, when it was announced). The 40 was presented at Cannes in September 2017 together with the 50. The weak point of the Lagoon 42 is tankage: SAIL’s 2016 test called it light and said owners planning longer trips would need to add capacity. The 40 has 300 L of water and 400 L of fuel.

The Lagoon 46 replaced the 450 in 2019. SAIL’s 2021 test noted the mast set further aft to cut hobby-horsing, larger hull windows, and black-water tanks moved down under the sole. Water is up to about 600 L (158 US gal). SAIL listed 45 hp engines as standard and 57 hp as an option; Lagoon’s current spec sheet gives 57 hp as standard. The Lagoon 50 was presented in 2017, with three, four or six cabins. Its successor, the Lagoon 51 of 2022, keeps the 50’s hulls.

What to check on used Lagoon catamarans

Saildrive diaphragms. Most of the Lagoons in this guide have Yanmar engines on saildrives. Yanmar’s operation manual says to replace the rubber diaphragm every seven years. Ask for the invoice and look for milky gear oil.
Bulkheads and beam. On the 450 this is essential. On other models it is still a sensible place for the surveyor to look on a production catamaran that may have been overloaded on charter.
Engine plates. Several models were offered with two engine sizes, for example 45 or 57 hp on the 42 and 46, and 30 or 40 hp on the 400. Check what is fitted instead of trusting the listing text.
Tankage and power. The 380, 400, 40 and 42 have small water tanks. Price in a watermaker and solar if the boat lacks them.
Charter history. Ask which fleet ran the boat, for how many seasons, and for its damage log. Our catamaran inspection checklist covers the rest, from deck hardware to moisture readings.
Which version. 420 or 421, hybrid or diesel, 450 F or 450 S, 400 or 400 S2. Listings mix these names up often. The HIN and build certificate will tell you.

Which years we would look at

For under about $220,000, a well-kept 380 S2 or an ex-Croatian 400 S2 is the obvious choice. Pick the boat with the better maintenance file over the newer one. For a 420, choose the diesel version unless you understand the hybrid system and the boat has recent batteries. With the 450, we would look at boats built from 2013 and still have the forward bulkheads checked. If you have the budget, a 40, 42 or 46 gets you the aft-mast rig, which is the biggest change Lagoon has made in twenty years.

You can browse Lagoons and other cruising cats on the catamarket marketplace. If you are moving up from an older Lagoon, you can list your current boat free, with up to 15 photos, online for 12 months and no commission.

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Sources

Cover photo: Rinald Rolle on Unsplash.