The owners of adjoining apartments atop 720 Park Avenue are attempting to sell the pair as a combined duplex for $43 million. One owned...

Isaac Ash, founder of underwear and legwear manufacturer United Legwear, purchased a 17-room duplex on the Upper East Side for $18.5 million, according to property...

Cardboard box mogul Dennis Mehiel is bringing his 17-room duplex in the Carhart Mansion at 3 East 95th Street to market again, after it languished...

UPDATED, 11:57 a.m., Aug. 13: A Tribeca penthouse has just been put on the market with an asking price of $35 million, the New...

Casablanca Capital chairman Donald Drapkin and girlfriend Elyse Slaine have purchased a duplex at 700 Park Avenue for around $4.2 million, the New York...

Howard Marks, the chairman and co-founder of global investment management firm Oaktree Capital Management, was the buyer behind the record-setting sale of the Courtney...