820 Fifth Avenue is landmark pre-war mid-rise cooperative building. Designed by Starrett & Van Vleck, and erected in 1916, this magnificent building is one of the stateliest, and most expensive, apartment buildings on Fifth Avenue as well as one of the supreme residential addresses in the world. The building has an Italian Renaissance-style limestone classically inspired façade, which is broken into five sections by four prominent string courses. The centers of the east and south façades have large balconies with balustrades. The Fifth Avenue corner has a rounded column quoin. The entire building is covered in a slightly rusticated stone, is fronted by lush sidewalk landscaping and its entrance is canopied flanked by bronze lanterns. There is only one apartment (probably around 8,000 square feet) on each of its 12 stories. Each apartment is laid out around a 44-foot-long gallery that gives onto the living room, dining room, and library, all equipped with fireplaces and park views. There are five bedrooms, six and a half bathrooms, servants' quarters and linen rooms.
820 Fifth Avenue is one of the addresses that Tiffany stationers call "beautiful addresses" and is truly an A-plus building.