Help with ordering

  • Study plans are extracts from the plans allowing the buyer to have a more precise knowledge of the plan content. If you are ordering the building plan, you do not need to order the study plan.
  • The Building plan is the basic document to build the boat. It includes a free telephone or e-mail assistance.
  • Full-size patterns, or kit, are required to build this boat.
  • It is possible to buy a kit from one of my partners.
  • Postage and VAT, if applicable, are included in the shown prices.


Pilot house cruiser, semi-planing hull, outboard motor, 7 m long

Hull length / waterline   6.98 / 6.50 m Sail area   0
Breadth / waterline   2.50 / 2.20 m Outboard motor   30 to 60 hp
Draugth   0.38 m Design category / Crew   C6
Light weight without/with motor   1 100 / 1 220 kg Building time with plywood kit   1000 hours
This plan is available in French only. If you would like to order an English version, please get in touch with the architect. Attention: this boat may be built only with a numerically cut plywood kit or with full size patterns. Due to the high number of plywood panels, the kit is recommended.
Drawing (version A) Drawing (version B) See photo albums

Koulmig 23 is the natural extension of the Koulmig 20 with one meter more. This makes it possible to install a wheelhouse for greater comfort at sea while retaining what made the Koulmig successful: a classic and straightforward look, simple and light plywood construction, easy maintenance, accessible to both professional and home builders. The boat’s aesthetics is reinforced by shaped sides (flared bow and tumblehome aft) made of cold-molded plywood, a technique already used on several other designs like the Pen-Hir sailboat.

The semi-planing shape ensures the ability to navigate in rough seas and in protected water with moderate power. Koulmig 23 is designed to accommodate an outboard motor with a power of nearly 50 hp, giving a speed of around 14 knots and ensuring minimal fuel consumption.

The fore cabin offers a beautiful double berth and a toilet area separated from the wheelhouse. The wheelhouse has two forward-facing seats, a kitchen area, a dinette on the port side, and the possibility of a third berth. The cockpit is spacious and clear. You can fish there comfortably, sunbathe or set up a table at the mooring. There is also a large locker.

There is also a version with an extended wheelhouse (named version B), with a toilet/shower aft, offering more interior comfort. It was designed for people wishing to do river navigation. However, the basic version (version A) provides a larger cockpit, better at sea for fishing.


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