Backed by a world of experience on the water, in the boatyard and in the design office.

Kelsall Catamarans was established in Cornwall, United Kingdom in 1965. The company's boat design and boat building operations produced a wide range of craft, all based on the use of PVC foam. Three projects by this company were the largest boats of their type at the time.

We have over 40 years of specialising in catamarans and composites, and developing the KSS (Kelsall Swiftsure Sandwich) custom build process. We are the World Leaders in this field. Kelsall Catamarans Limited now runs its successful office from New Zealand since moving here in 1998.

We celebrate 45 years since Toria won the Round Britain Race!

"KSS - The method every other designer wishes he had invented"!


Kelsall Catamarans can supply either a standard design from our extensive range of power, sailing, racing and commercial boats, or a custom design to suit. Our standard designs range from a 22 ft day catamaran to an 82 ft power/sail. Choose from luxury cruisers, fast cruisers, minimum accommodation cruisers. Lots to choose from in the 22 - 60 ft range.

Our custom designs are usually larger boats, high performance racers and specials. We have experience with power and commercial designs, including 500 passenger ferries. All are equally applicable for KSS build and get the maximum benefit from the KSS process. KSS can be applied to other designs. The KSS technology can be supplied separately, accordingly.


  • 2014 KSS workshop. We have fixed the date for the next KSS workshop - 11-14th Sept in Lenoir City, Tennessee, US. This is our usual four days, Thursday to Sunday. Do register your interest with KC office. See other details here or contact us.
  • KC Newsletter Aug.2013, read here.
  • The new - "Kelsall Cat Rig". The twin wing rig with a difference. A rig for catamarans, which just makes sense. Safer, excellent all round performance, lowest loading on all parts of the rig and structure, easy to handle... Read the article here.
  • Launches include:
    - 63' Sailing Charter Cat in Korea.
    - 43' 22kts Passenger Ferry in Vietnam.
    - 43' 30kts Power Cat in Peru.
       > Power up to 46'
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