This addition at a private business & social club integrates the fifth-floor restaurant’s existing roof terrace with a new four-season rooftop dining experience. The design features folding windows on opposite side walls to allow for cross ventilation, and a grid of nine large skylights to allow daylighting and reduce energy use. The end wall included clerestory windows to offer views of the surrounding skyline; and included an electric fireplace flanked by millwork water features to conceal the rooftop mechanical equipment beyond. The addition adapts the 1905 heritage designated building for change with the increased seating capacity and four-season dining experience.