Ultimate luxury is yours in this premier Park Avenue condominium apartment. Upon entering from the semi-private elevator landing you are welcomed via a gallery with a spacious foyer that escorts you into the elegant living spaces with high 10 ft. ceilings.     This beautifully-designed home welcomes entertaining with a large living room and second bedroom has been converted into a paneled Mahogany-wood library with oversized windows looking out to views of the tree lined Park Avenue, formal dining room and gourmet eat-in kitchen with custom wood cabinetry, premium-grade appliances and marbled countertops.     The master suite is exceptional, with a spa-like en-suite bath with double sinks, a deep soaking tub and separate glass-enclosed steam shower. Other highlights include an elegant powder room, washer/dryer in unit and excellent closet space. Savant System controls lighting, sound, HVAC and heat.     The building completed in 2000, 515 Park Avenue has only 30 apartments on 43 floors. This white glove full service prestigious building has a full time concierge and valet service, large gym with state-of-the-art equipment, 24-hr security, huge private sitting room and separate dining/conference room with a fully equipped catering kitchen for use of residents only. Individual staff suites are available on the second floor for residents use. This prime address is near Central Park, fine restaurants, boutiques, cultural institutions and transportation.