Allen Simon’s sixth-floor apartment at 838 Fifth Avenue snagged a signed contract after seven years on and off the market.

Naftali Group has signed a contract to purchase a luxury apartment property in Upper East Side of Manhattan for more than ...

The Naftali Group may be considering a condo conversion, which was presented as a possibility in the property’s marketing.

Naftali Group has agreed to buy the 33-story luxury apartment building at 800 Fifth Avenue for more than $800 million.

With 360 degrees of wide-open views, a private 25’ elevator landing, and rare fully-circulating floorplan, the Siena’s 29th floor is like a private castle set above Lenox Hill.” ...

And now, the super-luxe Upper East Side condominium has given Robb Report an exclusive look at the swanky full-floor aerie, which is currently listed for $24.7 million. Comprising a comfortable 5,516 ...