Lagoon 450F (Florida)

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Asking: $595,000 (USD)
Duty Paid
Location: Fort Pierce (Florida)
S/V Undaunted is a Fort Pierce based 2017 Lagoon 450F Catamaran For Sale By Owner
This catamaran owner requires financial settlement only. No trades.
This seller is open to offers via CatamaranSite escrow.

S/V Undaunted is a 2017 Lagoon 450F catamaran, for sale by owner in Fort Pierce, FL.

Replacing an icon is never easy, but when the Lagoon 450 replaced the 440, a new benchmark was created. The Lagoon 450 has taken several items ideas from its predecessor, enhanced them through owner feedback, and created a larger sail area for favorable cruising speeds.

The 450 flybridge version gives optimal visibility and access to sailing controls while providing easy access to the main cockpit and seating areas via twin stair wells. Cushions and lounging areas abound for the family and crew to relax under way or in port. The Sport version of the 450 allows boaters who wish to enjoy the comfort of a catamaran of 45 feet in a more conventional version, with a helm post on bulkhead in place of the flybridge.

As with all Lagoon catamarans the vertical windows provide superb visibility while maximizing interior space and keeping the interior cool under those overhanging eyebrows. Decks are easy to move around on with flush deck hatches. Lagoon’s proprietary gull wing bridge-deck design minimizes slamming in big seas.

Undaunted was 4 cabins and 4 heads that has been converted into a pseudo “owners version”, 3 cabin 4 head with a custom utility room. The utility room has amazing features such as a washer AND dryer, custom storage drawers with expansive workspace.

The galley has been upgraded to a true chef’s kitchen. These upgrades are documented on YouTube. Bulkheads have been inspected and reinforced.


Key Features

  • Air Conditioning
  • 40gph Watermaker
  • New Freshwater Heads
  • New Hardtop
  • New Sunbrella enclosures
  • New Trampoline
  • New Salon and Flybridge Sunbrella cushions
  • 4315 watts of solar
  • Upgraded Lithium Batteries-53 kWh 48v
  • Tender w/ 30hp Outboard
  • Icemaker
  • Dishwasher
  • Washing Machine
  • Clothes Dryer
  • Bowsprit
Catamaran Name:S/V Undaunted
Year Built:2017
Builder:Lagoon (France)
Designer:Marc Van Peteghem / Vincent Lauriot Prevost
Construction:Infusion molded with solid glass below the waterline. Balsa core hull and deck.
Loa:13,96m / 45'10''
Lwl:13,96m / 45'10''
Beam:7,84m / 25'9''
Headroom:6’ 8”
Draft:1,30m / 4'3"
Displacement:15,10t / 33296 Lbs
Mast Height:23,05 m / 75'8''
Cabins:3 + Utility Room
Galley Location:Up
Engines:2 Yanmar 57
Engine Hours:P 2400 S 2000
Sails:Factory main sail
Factory jib head sail
Double purchase Dyneema halyard
Halyard and sheet blocks
Wingaker/Parasail 168 sqm (1808 sq f) with 4 blocks, sheets and braces

Layout Diagram

Catamaran Inventory


  • White GRP with balsa sandwich core down to waterline
  • Solid GRP below the waterline and including keels
  • Infusion moulded


  • Charter version-ensuite double cabins in port hull with aircon
  • 1 ensuite double cabin in port aft hull with aircon
  • Port forward cabin has been converted to a utility room with aircon
  • All cabins have private bathrooms with sinks, showers, and upgraded electric toilets w/ quiet freshwater flush (new March 2023)
  • Memory foam queen mattresses (all cabins)
  • Upgraded reading lights with USB sockets – 2 per cabin


  • Large main salon with panoramic view (standing headroom 6'9")
  • Marinair 48,000 BTU A/C (full-interior)
  • Composite Dining Table
  • New upholstery and all sets (March 2023 with storage underneath (seats 6 people)
  • 2 Padded leather stools for extra storage and seating
  • Additional well storage compartment built into floor
  • B&G VHF V60 with AIS


  • 85L stainless steel refrigerator/freezer combo
  • Scotsman cu50ga icemaker – up to 65lbs a day of ice
  • Miele 3 burner induction cooktop
  • Miele Convection Steam Oven
  • Miele 18” Dishwasher
  • 1200W Microwave
  • All dishes, cups and silverware
  • Carbon filtered drinking water tap
  • Additional 90L freezer in utility room
  • Upgraded Deep Titanium Corian countertops with custom waterfall edge
  • Upgraded single basin sink with upgraded faucet


  • Cockpit cushions with 6 scatter cushions
  • Dining table
  • Teak floors
  • Propane Storage for 2 tanks
  • Cockpit fridge
  • Generous storage locker
  • Weber BBQ Grill
  • Locking aluminum sliding door
  • Aeration hatch
  • Direct access to helm station on starboard side
  • Partial enclosures to keep rain out-New April 2023


  • Circuit Type: Direct Current 12V/Alternating Current 120V
  • Victron 48v/15,000w 240v Inverter Charger
  • 100A Auto Transformer
  • Galvanic Isolator
  • 53 kWh Tesla Lithium House Bank with fully integrated BMS monitoring system
  • 2335 watt solar on aft of boat
  • 1100 watts solar on coach roof
  • 880 watts portable solar panels
  • 7 Bluetooth enabled Victron solar controllers
  • 50 amp shore power cord
  • 48v – 100amp alternator to charge house bank (no generator)

Flybridge & Navigation

  • Largest possible flybridge fiberglass bimini top fully enclosed (new March 2023) – prewired for additional solar
  • Ripcord-wrapped steering wheel
  • B&G Zeus 3 12'' NAV Center and Plotter
  • B&G Portable Handheld VHF
  • B&G 4g 20” Halo Radar
  • Full Engine Controls
  • Autopilot controls
  • Depth sounder
  • Log Speedometer
  • Wind Speed and Direction
  • Garmin in-reach

Deck & Hull

  • New-2 coats of anti-fouling bottom paint (March 2023)
  • U-shaped foredeck seating area w/ Sunbrella dark grey upholstery
  • Hot and Cold fresh water rinse on sugar scoop
  • Pulpit Seats
  • Massive locker and extra storage under seating
  • Deck Wash Down Outlet with dedicated pump
  • Deck Light on Mast
  • Blue LED Lighting on Transom Steps, Cockpit, and Flybridge
  • Upgraded swim ladder at sugar scoop
  • Access to Windlass and Chain Locker by Vertical Panel
  • Manual winch for dinghy
  • Electric winch

Sails & Rigging

  • Factory main sail
  • Factory jib head sail
  • After factory bowsprit 5ft
  • New standing rigging in 2020
  • New crossbeam 2020
  • Double spreader rig
  • Aluminum boom
  • 2 cap shrouds w/ chafe guards, 2 lower shrouds w/ chafe guards, furling forestay
  • Slab reefing with 3 reefing points
  • lazy jacks and bag
  • Code 0 pole
  • Double purchase Dyneema halyard
  • Halyard and sheet blocks
  • Wingaker/Parasail 168 sqm (1808 sq f) with 4 blocks, sheets and braces

Engines & Mechanical

  • 2 x Yanmar 57 hp diesel engines (4jh57) with factory props
  • Yanmar SD60 sail drives (new June 2023)
  • Engine Hours @ Oct 23 P 2400 S 2000
  • Watermaker Pro 40 GPH plumbed to both tanks
  • 200 gal fresh water storage
  • 5 Marinair Aircon in 4 cabins and 1 in salon
  • Propane tankless water heater with reserve tank
  • 4 RGB underwater lights with controllers


  • Highfield 12ft console dinghy with Honda 30hp outboard with Mantus dinghy anchor

Anchor & Docking

  • 105lb Mantus M1 anchor on 175 ft of 1/2 chain
  • Mantus Anchor Bridle
  • 55lb backup anchor
  • Anchor windlass handheld remote
  • 10 fenders
  • Heavy duty mooring lines
  • Quick windlass


  • First aid kits
  • Electronic Falre
  • 6 lifejackets
  • Life sling 2
  • Smoke Detectors interconnected with Ring Alarm
  • Ring water sensors in all low lying areas


  • 1 x (60) Harkin electric 2-speed and helm
  • 1 x (60) 2 speed Harken
  • 2 x (50) 2 speed Harken
  • 1 x (40) 2 speed for dingy


  • All sanitation hoses replaced (march 2023)
  • New trampoline (March 2023)
  • New Main halyard (March 2023)
  • Stainless steel Magma Paddleboard rack
  • Numerous Filters, Pumps, Hoses, etc for Maintenance

Catamaran Photos