Lagoon 421 Buyer's Guide
Shopping the brokerage market for a Lagoon 421 means looking at the corrected successor to the 420, a 41-foot-4 catamaran with a 24-foot-7 beam and about 26,830 pounds displacement. These are third-generation Lagoons with VPLP naval architecture, twin 40-horsepower diesels, and a choice of three or four double cabins. Ex-charter examples are common, and owner three-cabin layouts are the more common on the used market, though both layouts are available.
Layouts on the Used Market
The 421 came in three- and four-cabin versions, and on the used market the owner-oriented three-cabin arrangement tends to dominate while four-cabin boats still turn up. Ex-charter histories are common, so a given hull may show higher hours and more wear in the saloon and cockpit than a privately maintained example. The gullwing bridgedeck and vertical-bow hull shape are consistent across the range, as is the rigid bimini extending the coachroof and carrying the mainsheet track, which keeps the cockpit open for relaxation rather than line handling.
Equipment and Common Upgrades
Well-equipped used 421s commonly carry autopilot, chartplotter, inverter, AIS, and air conditioning, with watermaker and solar frequent for off-grid cruising and electric winches easing sail handling. Bimini and dinghy davits are standard-fitted context rather than upgrades. Often-seen additions include radar and a cockpit shower, while a gennaker or asymmetric spinnaker and lithium batteries appear as less common owner upgrades. A buyer should weigh the energy cluster — inverter, solar, lithium if present — against planned anchoring time, and confirm the watermaker's age before relying on it.
What to Inspect
The electric motors offered on the earlier 420 were finished by the time of the 421 as the review noted, and the builder returned to diesel engines, so confirm any stated electric drive is a later retrofit, not original. Check the rigid bimini-to-coachroof joint and the davits, the only aft fittings, for stress, and verify the short-mast charter rig if a given boat carries it.
Availability and Buyer's Takeaway
Typical markets for the Lagoon 421 include Spain, the United States, Italy, Turkey, Croatia, and Guadeloupe. For a buyer, the checklist is brief: confirm cabin count and charter history, verify diesel rather than retrofitted electric propulsion, inspect the bimini-coachroof structure and davits, and assess the solar-watermaker-inverter energy suite against your cruising style. The 421 rewards the shopper who wants a corrected, diesel-powered Lagoon with a clear cockpit and strong light below.
Price & volume trends
Monthly asking-price and listing-volume trends for the Lagoon 421. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 13 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Jun 25 | 5 | $313,634 | — |
| Jul 25 | 1 | $380,478 | +21.3% |
| Aug 25 | 2 | $355,078 | -6.7% |
| Sep 25 | 4 | $296,832 | -16.4% |
| Oct 25 | 2 | $243,626 | -17.9% |
| Nov 25 | 1 | $287,871 | +18.2% |
| Dec 25 | 1 | $375,240 | +30.4% |
| Mar 26 | 1 | $167,906 | -55.3% |
| Apr 26 | 10 | $290,111 | +72.8% |
| May 26 | 4 | $331,857 | +14.4% |
| Jun 26 | 8 | $308,475 | -7.0% |
| Aug 26 | 2 | $371,212 | +20.3% |
| Sep 26 | 10 | $360,000 | -3.0% |
Where they're listed
Lagoon 421 listings appear across 12 countries. Spain has the most listings with 12 (33.3%), followed by United States and Italy.
Country view
36 listings · 12 countries| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| Spain | $268,530 | 12 | 1 | 33.3% |
| United States | $360,000 | 11 | 7 | 30.6% |
| Italy | $239,421 | 3 | 2 | 8.3% |
| Georgia | $365,000 | 2 | 1 | 5.6% |
| Australia | $383,424 | 1 | 1 | 2.8% |
| Grenada | $325,000 | 1 | 0 | 2.8% |
| Guadeloupe | $295,712 | 1 | 0 | 2.8% |
| Greece | $287,871 | 1 | 0 | 2.8% |
| Croatia | $167,906 | 1 | 0 | 2.8% |
| Martinique | $295,712 | 1 | 0 | 2.8% |
| Panama | $289,000 | 1 | 0 | 2.8% |
| Turkey | $435,727 | 1 | 0 | 2.8% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
11 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| LAGOON 42-2 | 42' | $ 448,048 | 891 | 187 |
| Robertson and Caine 42 / Moorings 4200 (2001-2004) | 41.4' | $ 504,054 | 174 | 36 |
| Voyage 4.2 | 42.13' | $ 591,332 | 152 | 23 |
| Catalina 42 | 41.86' | $ 75,000 | 117 | 23 |
| Lagoon 420 | 41.33' | $ 304,017 | 92 | 21 |
| Catana 4.1 | 39.76' | $ 403,243 | 84 | 22 |
| Lagoon 410 | 40.58' | $ 215,000 | 70 | 21 |
| Catana 4.0 | 39.14' | $ 324,835 | 44 | 6 |
| Lagoon 421You are here | — | $ 340,000 | 37 | 12 |
| Fountaine Pajot FP 41 | 39.7' | $ 773,000 | 19 | 5 |
| Jeanneau Sun Odyssey 42.1 | 41.99' | $ 82,334 | 12 | 4 |