Halsted Welles Associates is a Brooklyn based New York City design/build firm specializing in urban gardens. The atelier-style office develops unique design solutions for a residential client base, fabricates and installs what it designs, and provides on-going maintenance services. HWA's multi-disciplinary team of architects, designers, engineers, and horticulturalists is supported by in-house cr...aftsmen, gardeners and construction crews. Established in 1969, Halsted Welles is renowned for employing an interior designer’s attention to detail to create elegant exterior living spaces. The mission of Halsted Welles Associates is to return sustainable systems to the urban environment.