Seaworthy. Simple. Affordable.

Building your own boat with Wharram Designs is the easiest and most cost effective way to fulfil your sailing dreams. Wharram Self-build boat plans start from only £100.

We recommend you follow the tried and trusted Wharram process to ensure the boat you build is both the right type of boat for your needs and also one that will match your building skills and expenditure.

  1. Study our Self Build Boats page to familiarise yourself with our range of designs and their unique qualities. For more detailed information read the Wharram Design Book which reviews each self-build boat model and offers a detailed introduction and understanding of the world of self-build catamarans.
  2. Order one or more sets of our Boat Building Study Plans and immerse yourself into the boat builder's mindset; evaluate the costs; the amount of time required to build your boat; where you will build it and where you will eventually launch it.
  3. Once you have decided on the boat that is right for YOU to build, order the Boat Building Plans and become a member of the Wharram World of builders and sailors. You can build a Wharram with very little experience. All Wharram building plans are drawn for the first time builder, so anyone with a modicum of practical ability can build one of our designs. Our Building Plans present quality instruction, guidance and advice for both novice and professional alike. They are all based on decades of actual building experience and thousands of ocean miles sailed, so you know the design will work.

About James Wharram

In the mid 50's, based on his research into ancient Polynesian boat design, James Wharram built the first off-shore Catamaran in Britain and sailed it out into the Atlantic. While the world's yachting community were still dismissing such a design as a worthy sea-going vessel, James was landing his 23'6" 'Double Hulled Canoe' called TANGAROA in the West Indies.

There he built a second 40' Polynesian style Catamaran, RONGO, and sailed it up to New York and back to the UK accompanied by two German women - being the first to sail a catamaran West-to-East across the North Atlantic.

These amazing Trans-Atlantic crossings and the follow up book "Two Girls, Two Catamarans" have etched the name 'James Wharram' into the annals of yachting history.

The quality of the Wharram self-build catamarans is reflected in their popularity, excellence of craftmanship 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.

Wharram Hui Cornwall Gathering 2020

Wharram cats next to a quay
Hanneke Boon
Wharram cats at Devoran Quay

This will be the third Wharram Hui (Polynesian gathering) to be held in Devoran. After last year's cancellation of the Hui due to Hanneke's stay in hospital, we want to make this years Hui better than ever. Bring your Wharram catamarans for a festive gathering of Wharram sailors and enthusiasts. Sail there, or bring your small Wharram on a trailer, to launch at the Quay.

Florida Wharram Hui 2020 Announced

Pirate's Cove
Greg Russell
Pirate's Cove. Hui Wharram 2020. May 15-17, 2020. Pirates Cove Marina. 6664 Co Rd 95. Elberta, AL 36530

Greetings fellow Wharramites, Wannabees, and Walkabouts. From Fort Meyers to Islamorada to a new venue on the Gulf Coast, the 2020 Hui Wharram will be held at the Pirate’s Cove Marina near the Florida/Alabama state line. Pirates Cove Marina and Restaurant invites the Wharram fleet to tie up along the docks for easy ship-to-shore access, viewing, sailing, and debauchery on May 15-17, 2020.

Limited Edition Rongo Box Set (Building Plans)

Hanneke Boon

To celebrate the first epic Atlantic crossing of Rongo we are reprinting the original Building Plans of this design, beautifully drawn by Jutta in 1960. These come in a presentation box-set including a photo book of the history of Rongo, and the story of her further Atlantic voyages in 1960-61, plus a signed copy of James’ book about his pioneering voyages 'Two Girls Two Catamarans'. These Building Plans can be used to build a model or a full size replica of this famous design.

Subscribe to James Wharram Designs RSS