Sigma 41 Buyer's Guide
The Sigma 41 is a David Thomas design built by Marine Projects under the Sigma Yachts name from 1982, with around 70 completed at the Plymouth yard. She is a 41ft 9in fin-and-spade cruiser-racer of 22,200lb displacement on 8,100lb of lead, offered on the used market as a serious offshore-capable yacht rather than a weekend coastal toy, and the brokerage examples one meets often reflect long, hard use under sail.
Layouts on the Used Market
Most boats carry the masthead rig, though fractional-rig hulls exist with a 797sq ft sail plan. Below decks the 41 sleeps nine, with a port galley by the companionway, opposite a half-Admiralty chart table, and a walk-through aft cabin beneath the bridgedeck. The liner-free interior means joinery is bonded straight to the hull, so layouts read as traditional teak rather than moulded white fiberglass — a point of appeal for buyers who want to inspect structure. A starboard list is normal and not a defect; it comes from where the heavy gear sits below.
Equipment and Common Upgrades
Boats that have crossed oceans commonly carry radar, autopilot, inverter, and chartplotter as standard long-distance kit, with AIS and EPIRB often seen as well. Power and energy systems frequently include solar and wind generators alongside watermakers, while electric winches and liferaft are usual on well-found examples. Canvas and sail-handling upgrades often appear as biminis, with teak decks and cockpit showers marking the cruising conversions; bow thrusters and asymmetric spinnakers sit at the owner-upgrade end and are less common.
What to Inspect
The defining quirk is the starboard list, which the design's own weight distribution produces and which needs no correction beyond aware loading. More consequential for survey is the engine: the original 36hp Bukh diesel is fully accessible by removing engine-box panels, but many 41s have been re-engined with lighter modern units, and that swap often leaves the boat trimming slightly bow-down — check the reported engine and the fore-and-aft balance. Because the interior lacks mouldings, look closely at the hull-bonded joinery and the main bulkhead's tie to the deckhead for any de-bonding from impact.
Availability and Buyer's Takeaway
Sigma 41s turn up in Grenada, Portugal, Greece, the United States, France, and the Netherlands, typically as established cruisers rather than fresh restorations. For the shopper, the short list is: confirm rig type and sail area; verify original Bukh or assess re-engine bow-down trim; inspect hull-bonded joinery for de-bonding; accept the starboard list as inherent; and budget for the voluminous stowage to be kept disciplined so the yacht stays light on her helm.
Price & volume trends
Monthly asking-price and listing-volume trends for the Sigma 41. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 6 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Sep 25 | 2 | $58,886 | — |
| Oct 25 | 5 | $59,000 | +0.2% |
| Jan 26 | 1 | $59,000 | 0.0% |
| Apr 26 | 6 | $59,000 | 0.0% |
| May 26 | 2 | $54,946 | -6.9% |
| Jun 26 | 2 | $43,980 | -20.0% |
Where they're listed
Sigma 41 listings appear across 6 countries. Grenada has the most listings with 7 (41.2%), followed by Greece and Portugal.
Country view
17 listings · 6 countries| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| Grenada | $59,000 | 7 | 0 | 41.2% |
| Greece | $43,980 | 3 | 2 | 17.6% |
| Portugal | $63,655 | 3 | 0 | 17.6% |
| United States | $59,000 | 2 | 0 | 11.8% |
| France | $56,329 | 1 | 0 | 5.9% |
| Netherlands | $46,237 | 1 | 1 | 5.9% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
5 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Westerly Oceanlord 41 | 40.5' | $ 74,384 | 29 | 5 |
| Sigma 41You are here | — | $ 59,000 | 18 | 3 |
| Tartan 41 | 40.63' | $ 69,000 | 9 | 2 |
| Sweden Yachts 41 | 41' | $ 68,574 | 7 | 1 |
| Cheoy Lee Offshore 41 | 40.92' | $ 49,000 | 6 | 1 |