NEW TO MARKET! A magnificent triple mint, full-floor designer 4-bedroom 4.5-bathroom residence with a large private balcony in a glorious prewar boutique condominium on the Upper East Side. The 4th Floor at the Park Mansion presents over 2,700 SF of classic prewar architecture enhanced by top-of-the-line contemporary finishes and the finest design enhancements throughout. An elegant private vestibule clad in charcoal grey Venetian plaster opens into an entry gallery leading to a massive entertaining living room spanning over 25 feet and drenched in sunlight through a wall of oversized six-over-six windows, peering over the treetops along East 82nd Street and the neighboring rooftops beyond. Palatial in scale, the living room flows into a chic library to the West and formal dining room to the South, all creating a perfectly harmonized entertaining and living space. The library is appointed by a customized closet as well as a full marble bathroom, making it perfectly suited to serve as an additional bedroom or guest room, depending on need. No function or detail has been overlooked in this home, particularly in the sophisticated and decadent double-windowed chef's eat-in kitchen by Arclinea. There is perfectly customized cabinetry throughout along with a generous breakfast bar, countertops and backsplash all in durable Taj Mahal quartzite, subtly enhanced with integrated flip-up counter outlets for an added touch of refinement and convenience. The appliance suite is top-of-the-line and includes a 48" integrated side-by-side refrigerator/freezer, 46-bottle wine fridge, main oven, speed oven, integrated dishwasher and gas cooktop with vented exhaust, all by Miele. Embellished with Dreamscape fixtures and both pendant and recessed lighting overhead, the kitchen is a sumptuous medley of design and function. In the South wing, three main bedrooms are all bathed in natural sunlight and each have their own en-suite marble bathroom. An extravagant primary suite offers its own landscaped balcony peering out onto courtyard greenery and charming prewar architecture and is perfect for both lounging and soaking up the sun. There is a large customized walk-in closet and a sumptuous 5-fixture windowed bathroom with floor-to-ceiling Calacatta polished marble walls, Bardiglio white marble floors with radiant heat, a deep soaking tub as well as an oversized stall shower and separate water closet both behind frosted glass doors. With polished nickel hardware by Samuel Heath and Phylrich, no expense was spared. Additional features and conveniences include a discreet powder room off of the central corridor, central air conditioning, wide plank white oak floors throughout, a dedicated laundry closet with a full-sized washer and dryer and a private basement storage room. Built in 1900 by the Beaux-Arts architecture firm of Janes and Leo, this stunning landmarked building has been thoughtfully reimagined to offer its residents the finest in contemporary living. Amenities include a full-time doorman and fitness room. Residents enjoy proximity to gorgeous Carl Schurz Park and the East River Promenade, many of the finest educational and cultural institutions of the Upper East Side, vibrant dining and shopping experiences as well as easy access to all major public transportation including both the Second Avenue and Lexington Avenue Subways. Pets are welcome. This property is being offered for both sale and rent.