Bianca Commander 31 Buyer's Guide
Shopping the used market for a Bianca Commander 31 means looking at a design by Knud E. Hansen and Jan Kjærulff from the late 1960s, built by Bianca Yachts with fewer than 200 examples completed. She is a fiberglass sloop with a balsa-cored hull, offered in masthead or fractional rig and with either a standard or shoal fin keel, and her used-market presence is centered in northern Europe.
Layouts on the Used Market
Sleeping space for six is provided along with a galley and toilet, with the belowdecks finished in mahogany. Her 30-foot-7-inch length and 8-foot-8-inch beam give a six-berth cruising layout rather than a sparse racer interior, and the shoal fin keel drawing about 3.71 to 4.01 feet makes some examples especially handy for shallow Baltic and inshore marinas compared with the deeper 5.45 to 5.75 foot fin.
Equipment and Common Upgrades
On the brokerage market, a circumnavigation-oriented setup with autopilot is commonly fitted to Commander 31 boats, signaling that many have been prepared for longer passages rather than pure day sailing. For a buyer, an autopilot paired with a passage rig means less helm fatigue offshore, though the Volvo Penta MD1B diesel with shaft drive still caps motoring near 4.0 knots regardless of electronics.
What to Inspect
The defining inspection point is the balsa-cored fiberglass hull: any penetration of the sandwich construction demands special care, so survey through-hulls, chainplates, and added fittings for core exposure or moisture. The wetted surface runs about 236 square feet, so a full hull inspection for blistering or core saturation is a practical part of any survey rather than a quick glance.
Availability and Buyer's Takeaway
Commander 31 boats are typically found in Germany, Denmark, and Sweden. For a buyer, the shortlist is: confirm keel draft against intended cruising grounds, verify autopilot and passage rigging are operational, and have a surveyor specifically check every hull penetration for balsa-core integrity.
Price & volume trends
Monthly asking-price and listing-volume trends for the Bianca Commander 31. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 4 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Oct 25 | 1 | $3,739 | — |
| Jan 26 | 1 | $16,884 | +351.6% |
| Apr 26 | 2 | $20,028 | +18.6% |
| Jun 26 | 1 | $4,725 | -76.4% |
Where they're listed
Bianca Commander 31 listings appear across 3 countries. Germany has the most listings with 3 (60.0%), followed by Denmark and Sweden.
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
2 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Hallberg-Rassy 31 | 31.56' | $ 92,586 | 43 | 13 |
| Bianca Commander 31You are here | — | $ 16,884 | 5 | 1 |