Fifth Avenue Place was designed by the Stubbins Associates of Cambridge Massachusetts. Final design of the office/retail structure was done in conjunction with the locally based architectural firm Williams Trebilcock Whitehead.
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.
Towering from Fifth Avenue Place is a 178-foot tall mast. It isn't a round mast though. This steel structure is actually 12-sided and measures four feet in diameter.
The mast's hollow interior contains a ladder which gives access to the aircraft warning light on top. This mast is designed to withstand sways of up to 3 feet in any given direction in extremely high winds.
The building is made up of 225,000 square feet of granite, 62,739 square feet of insulated glass windows and over 1,000 gallons of silicon sealant.
The tower consists of 29 floors of office space (689,839 sq. ft.) rising above two levels of retail shops (46,100 sq. ft.) and a three-level underground garage for up to 250 vehicles.
At night, the building is beautifully illuminated with more than 44,000 watts of light generated by 64 strategically positioned flood lamps.