This sophisticated and truly elegant four bedroom, four and one-half bath is in one of Manhattan’s finest pre-war co-ops, designed by the celebrated residential architect James E.R. Carpenter. Enter via a private elevator landing into a 23-ft entry gallery; true to Carpenter's sense of balance, the grand living room and dining room are perfectly proportioned. Soaring 10’7” ceilings and enormous sash windows create a sense of drama and a volume of space that make for elegant entertaining and general enjoyment. The 28’ living room opens to the grand dining room, comfortably accommodating a crowd and spanning a total of 49’. Views north are to the historic Colony Club on East 62nd Street, a tony and attractive neighbor. The south-facing library with dry bar is the quintessential room in which to curl up with a book and chat with friends and family. The private bedroom wing is currently configured with a corner primary bedroom, three additional bedrooms, four bathrooms and a powder room off the library. The eat-in kitchen has a large pantry area with washer and dryer. With nearly 3200 square feet, this original 10-room, now 8-room offers many options to customize this glorious space to suit your needs. Bring your architect and your imagination. 550 Park Avenue is pet friendly and permits 50% financing and pieds-a-terre. Storage transfers upon sale. No summer work rules. 3% flip tax by purchaser.