JCLA is a design build company based in Sag Harbor NY. We have been in business designing and implementing landscapes throughout the Hampton’s and the tri-state area since 1994. We pride ourselves on our extensive landscape related knowledge, experience and the ability to carry out projects of all shapes and sizes in a timely manner. We are a Better Business Bureau accredited company, an indicator of good business techniques and a great reputation since joining it in 2004. JCLA have undertaken projects with budgets in excess of  2 million dollars as well as project budgets of a few hundred. We have created gorgeous pots of annuals at the small scale, transplanted very large trees at the other end of the spectrum.



John Cowen has been living and working as a landscape designer in the Hamptons for the past 25+ years. Since 1994 he has operated his own design and build company.

The company has been involved in projects ranging from $500 to $2m +.

John has been involved in the landscape industry for 30+ years including 8 years of training as a Landscape Architect at Greenwich University, including a Horticultural degree equivalent from Merrist Wood College, Surrey, England.

The combined experience, professionalism and knowledge within John Cowen Landscape Associates Ltd. makes the company unique and stand out from other landscape companies in the Hamptons.



JCLA’s work throughout the ‘Hampton’s’ area is varied and we enjoy the challenge that each type of landscape offers.

As well as cultivating lasting and beautiful landscapes, JCLA strives to cultivate long lasting relationships with our clients. We believe that like landscapes, each client deserves special attention. Therefore we welcome and encourage clients to be involved in the design process and beyond. We know that after all is said and done, you are the ones who are going to be living with the landscape.