Julia Koch sold her 18-room duplex at the prestigious 740 Park Avenue co-op for 45 m. The property, bought by her late husband David Koch for 17 m in 2004, was once listed for 60 m. Known as New York’s “richest building,” it has housed elite names like John D. Rockefeller Jr. and Stephen Schwartzman. Koch has been active in real estate since David’s passing in 2019, selling an Upper East Side townhouse for 41 m in 2023 and purchasing Paul Allen’s apartments for 101 m in 2022, along with a Southampton estate for 70 m in 2021.
740 Park Avenue
