Located in New York City, the East Hampton 5 residence was designed and completed by local design firm KOSA.Kevin O 'Sullivan and Associates is an architectural design firm based in New York and the hamptons, founded by designer Kevin O 'sullivan. The company caters to a variety of customer needs, including architectural and interior design of urban and rural homes, as well as custom furniture.

Kevin O 'Sullivan is a modernist with a special preference for all architectural designs in the form of modernism. He started his career in New York by accident 23 years ago. He had gone from Scotland to Asia and stayed there for five years before settling in New York. Kevin’s education and international experience have enabled him to integrate classical proportions with contemporary design styles. His work reflects over twenty years of experience and his desire to support sophisticated lifestyles with the best of classical European forms, contemporary materials, and subtle design elements.