Allison Koffman, Juliette Janssens and Nadia O'Reilly Close a $6.2M Carnegie Hill Classic Seven at 1100 Park Avenue 6B
The Sotheby's International Realty team closes a renovated three-bedroom, three-and-a-half-bath prewar cooperative with four rooms overlooking Park Avenue.
Allison Koffman, Juliette Janssens and Nadia O'Reilly of Sotheby's International Realty have closed the sale of Residence 6B at 1100 Park Avenue for $6,200,000. The home closed in October 2026.
Set in a sought-after Carnegie Hill cooperative, the beautifully renovated eight-room residence offers three bedrooms, three and a half baths, grand scale and exceptional light, with four rooms overlooking Park Avenue.
A gracious living room is anchored by a fireplace flanked by built-in bookshelves, and a formal dining room is ready for entertaining. The kitchen centers on a large island and flows into a family room. The primary suite includes a windowed bath with double vanity, while a second bedroom faces east over Park Avenue and shares a windowed bath with the library, which serves as a third bedroom. An office or staff bedroom with its own bath and generous closet space complete the plan.
Built in 1930 by architects Anthony DePace and Samuel Juster, 1100 Park Avenue is a full-service, white-glove cooperative with a fitness center, bicycle storage and private storage.
For Koffman, Janssens and O'Reilly, it is a classic Park Avenue close in one of Carnegie Hill's most admired prewar addresses.
Closed sale. $2M+ in live markets only. Listing agents named as published. Source: Sotheby's International Realty. Photos: Courtesy Sotheby's International Realty / Allison Koffman, Juliette Janssens and Nadia O'Reilly. Luxury Price Drops is not a brokerage.