About James Wharram Designs

James and Hanneke in the design studio with Amatasi model
James Wharram and Hanneke Boon

James Wharram Designs are designers of unique double-canoe style sailing catamarans inspired by the canoe craft of the Pacific. They have their headquarters on the shore of Restronguet creek in Devoran, Cornwall.

James Wharram is the pioneer of offshore multihulls, making his first Atlantic crossing by catamaran in 1956 and the first ever North Atlantic West-to-East crossing by multihull in 1959. He started designing for self-builders in 1965.

Wharram designs are based on years of practical, hands-on experience of building and ocean sailing catamarans.

Wharram designs are renowned for their seaworthiness, stability and safe simplicity. Ask any ocean sailor and he/she will have seen Wharram catamarans in far off ports of call.

Designs from 14’ – 63’ are available for self-building in ply/epoxy with very detailed, easy to follow Plans often described as 'a course in boatbuilding'.

Several franchised yards offer professionally built Wharrams.

To find more about what Wharram has to offer, explore our website. If you want to build your own catamaran and experience the freedom of sailing, your dream begins here.

Read more about our team: James Wharram, Hanneke Boon and Ruth Wharram.