James Wharram Designs
We at James Wharram Designs are designers of unique double-canoe style sailing catamarans inspired by the canoe craft of the Pacific.

Wharram designs are based on years of practical, hands-on experience of building and ocean sailing catamarans. They are renowned for their seaworthiness, stability and safe simplicity. If you want to build your own catamaran and experience the freedom of sailing, your dream begin here. The quality of the Wharram self-build catamarans is reflected in their popularity, excellence of craftsmanship and ‘sound sailing qualities’. More than 50 years on – with over 10,000 sets of plans sold and thousands turned into proud vessels – Wharram ‘Cats’ can be seen in harbours across the world, maintaining the highest reputation for surviving wind and wave.


Tiki / Coastal Trek Designs

From the car trailable TIKI 21 – Winner of the 1982 Cruising World Design Competition, to the TIKI 46, a spacious ocean cruiser or charter boat. The TIKI range offers car trailable Coastal Trekkers to long term live aboard. On the larger TIKIs the ‘Deckpod’ offers sheltered steering and the ‘Stern Ramp’ provides easy access to and from the water. The TIKIs are boats you can work and live on.

Mana 24

The most economical way to enjoy sailing is to build your own small lightweight boat, to keep it at home and trail it to the waters you want to sail in. This gives opportunity to explore many more sailing areas than if based on a permanent mooring and at much lower cost.

Pahi Designs

From the Coastal Trekking Pahi 26 to the impressive 63′ flagship of the Wharram fleet ‘Spirit of Gaia’ – the PAHI shape is more evocatively ‘Female’ than the Classic Wharram designs. Constructively, they are simpler to build, using epoxy fillets instead of more difficult wood joints. They are designed to use quick growing softwood plys, coated and glassed with epoxy to achieve a durable finish. The PAHI designs were the first to use rope lashings to attach the crossbeams, giving a shock absorbing effect, without the need for metal fittings.

Pahi 42 – Captain Cook

The Pahi 42 is a good size for family long distance cruising.

Ethnic Designs

The Ethnic designs have been a new development at James Wharram Designs since James and Hanneke sailed extensively in the Pacific. With everything self-made these boats are lower cost to build.


Winner of Classic Boat Design Competition 2010. The design is modeled on the hullshape of fishing canoes of Samoa, but built in ply/epoxy/glass stitch & glue construction.

Classic Designs

The early ‘Wharrams’, now known as the Classic Designs, are recognised as beautiful, safe boats – easy to build, and easy to sail. Many anchorages around the world are graced by these Classic Designs, and of the seventeen drawn between 1957 and 1976, nine are still available, from the 16ft Maui to the 51ft Tehini.

Tangaroa Mk IV

The Tangaroa Mk IV was a design that evolved from the Tangaroa Mk I, James’ first design for which he drew Self-building Plans in 1965.

Please do not hesitate to get in contact with us for further information on any of our services – we would love to hear from you! Or you can visit our social media pages to hear about our latest projects, news and deals.