McConaghy MC55 Buyer's Guide
The McConaghy MC55 on the brokerage market is the smallest catamaran the builder has produced, designed by Ker Yacht Design and built around a vacuum-infused carbon and Corecell structure. Shopping one means weighing a thoroughly modern cruising multihull with hydraulic centreboards and a full-house electrical package against the usual catamaran caveats of survey access and systems age.
Layouts on the Used Market
Used MC55s are offered in the two layouts the boat was built with: a four-cabin version where every cabin is en suite, or a three-cabin version that frees volume for a large master suite. In the three-cabin arrangement the starboard hull is given over to the owner's stateroom with private lounge, dressing room and ensuite, and the port hull holds two guest cabins each with its own bathroom. Both layouts share the wide saloon with full-length hull windows, retractable aft glass and open-plan island galley with twin 160 L Isotherm fridge and freezer drawers. Headroom in saloon and hulls is quoted at 2.0–2.3 m.
Equipment and Common Upgrades
Every MC55 left the builder with twin Yanmar 57 hp engines on sail drives with feathering propellers, 4.5 kW of coachroof solar, a 50 kWh battery and Victron energy management, plus dual 12-inch chartplotters, dome radar, GPS, VHF and Madintech autopilot. The standard sail wardrobe is a square top mainsail and self-tacking furling jib in North Sails 3Di OCEAN 700 on a carbon mast and V-boom. Because the energy and navigation suite was fitted as standard, most used boats will differ more in cosmetic or upholstery state than in missing factory equipment.
What to Inspect
The documented record raises no structural defects or flooding paths for the MC55, but a survey should still confirm the vacuum-infused carbon and Corecell structure is sound and that the hydraulic centreboard actuators hold their three preset positions without weep. Check the engine rooms for intact insulation, fresh-water cooling service history, Racor 500 fuel filter condition and exhaust waterlock and muffler integrity. Verify the two approximately 230-litre fuel tanks, two fuel level sensors and two deck fillers against the 460 L total, and confirm the 4.5 kW solar, 50 kWh battery and Victron system are functioning as a managed whole.
Availability and Buyer's Takeaway
No regional availability data is recorded for this model. For the buyer, the MC55 rewards those wanting a rigid carbon cruiser with shallow-draft flexibility and a weather-protected command layout.
- Confirm centreboard hydraulics hold preset positions with no leakage
- Verify carbon/Corecell structure and high-gloss finish condition
- Check Victron-managed 50 kWh battery and 4.5 kW solar output
- Inspect twin Yanmar sail drives, feathering props and Racor filters
- Match layout to need: four en-suite cabins or three-cabin owner's hull
Price & volume trends
Monthly asking-price and listing-volume trends for the McConaghy MC55. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 2 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Sep 25 | 2 | $ 3,687,500 | — |
| Apr 26 | 1 | $ 3,403,139 | -7.7% |
Where they're listed
McConaghy MC55 listings appear across 2 countries. United States has the most listings with 2 (66.7%), followed by Hong Kong.
Country view
3 listings · 2 countries| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| United States | $ 3,687,500 | 2 | 0 | 66.7% |
| Hong Kong | $ 3,403,139 | 1 | 0 | 33.3% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
7 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Lagoon 55 | 54.33' | $ 2,059,735 | 97 | 31 |
| Beneteau Sense 55 | 56.43' | $ 388,860 | 30 | 4 |
| Conyplex 55CS | 54.95' | $ 571,004 | 15 | 2 |
| Solaris 55 | 54.79' | $ 1,195,747 | 14 | 2 |
| More Boats 55 | 54.79' | $ 400,504 | 13 | 1 |
| Outremer 55-2 | 54.89' | $ 2,088,342 | 13 | 4 |
| McConaghy MC55You are here | — | $ 3,403,139 | 3 | 0 |