This stunning 3 bedroom duplex, beautifully renovated with meticulous attention to design detail as well as function, is located in an elegant 1913 building just steps from Park Avenue in one of the most sought-after locations on the Upper East Side.  This special home offers both the modern sensibility perfect for today's living together with prewar charm.Enter into a grand livingroom/ dining room with high ceilings, large windows, custom built in cabinetry as well as abundant storage space and through the wall air conditioning.  The gourmet chefs kitchen features Ann Sacks tiles, a large island perfect for casual dining, custom cabinetry, and top of the line appliances: Miele dishwasher,washer/dryer range and oven and subzero refrigerator.  The adjacent staff room, which can be closed via wall-height pocket doors, has been incorporated into the kitchen and configured as a well-designed home office area with adjoining powder room but could easily be converted to an eating area or back to a staff room.   A beautiful staircase leads to the upper floors three bedroom with custom closets and two full bathrooms.  The master bedroom is large with closets galore and a large bathroom with multiple storage cabinets complete with boffi tiles and sinks, and a large glass shower enclosure with a beautiful rain shower.   The other two bedrooms have great closets and share a bathroom.  There is an outside storage bin that is included in the sale.This white-glove full service building has 24-hour doorman and live-in superintendent, a lovely rooftop garden, common bike storage, laundry room and private storage bins.  In addition there are attic rooms available for rent.  Pet friendly.  Up to 50% financing permitted.  2% flip tax.