A chic and sophisticated, renovated 11-Room Duplex located in one of Park Avenue's most sought after luxury Prewar Cooperatives in the heart of Manhattan's Upper East Side. 840 Park Avenue is a magnificent 12-story limestone building built in 1914 by George and Edward Blum. The Entertaining/Living Level: A large Gallery opens onto the entertaining rooms each with floor-to-ceiling French Doors/Windows opening onto Juliette balconies. A corner, oversized 16'6” x 25'8” Living Room is anchored by a wood-burning fireplace. The grand Living Room faces East and South overlooking Park Avenue and boasts multiple seating areas. The Formal Dining Room faces South over a quiet, tree-lined block and offers elegant entertaining. A large paneled Library/Den features a wood-burning fireplace and custom bookshelves and storage. The Eat-In Chef's Kitchen is renovated with top of the line appliances featuring: double Sub Zero Refrigerators with double freezer drawers; abundant custom cabinetry/storage for china, silver, crystal and glassware; wine storage; A/V closet; a windowed Pantry and separate Laundry Room with a W/D and sink. A Powder Room near the entry completes this level. The Bedroom Level: A grand Primary Bedroom Suite faces south with excellent light, a Wood-Burning Fireplace, 2 separate Dressing Rooms and a large, marble Bath with double-sinks, separate windowed shower, tub and WC. The Upper Level is completed by an additional corner 2nd Bedroom with Wood-Burning Fireplace and en-suite Bath; a 3rd Bedroom facing Park Avenue with en-suite Bath and a 4th Bedroom with en-suite Bath. There are ample custom outfitted closets and storage, CAC, hardwood floors and high ceilings throughout. This spectacular residence offers gracious, serene living and grand entertaining space. 840 Park Avenue offers the highest level of service, privacy and security with a 24-hour Doorman, Porters and a Resident Manager. Pets and pieds-a-terre permitted and a storage cage transfers with the apartment. There is a 2.5% flip tax paid by buyer. 50% Financing is now allowed.