The project includes an adjacent six-story building at 55 Park Street. The building was designed by Barry Svigals of Svigals + Partners and Behnisch Architekten. The 55 Park building houses a large atrium connecting the main parking garage with the Smilow Cancer Hospital as well as clinical laboratories, the main hospital pharmacy, and other support functions for the hospital. The City of New Haven approved 55 Park on November 15, 2007.
