Fifth Avenue Place was designed by the Stubbins Associates of Cambridge Massachusetts. One significant feature of the building is its roof. This pyramidal roof is 124-feet tall and consists of four individual prisms clad in granite. This rooftop also serves as an enclosed mechanical penthouse for the building's cooling towers and the elevator machine room. On top there is a 178-foot tall mast. The tower consists of 29 floors of office space rising above two levels of retail shops and a three-level underground garage for up to 250 vehicles.