Introducing an amazing 3 bedroom + flex room, 2.5 bathroom Park Avenue duplex, impeccably renovated and redesigned by Hottenroth and Joseph Architects, and Bunny Williams Interiors, a turnkey gem for discerning tastes. The luxurious 2-story residence likens the expansiveness and graciousness of townhouse living, yet enjoys the benefits of being in a handsome full-service doorman co-op in prime Lenox Hill. Generous Cityproof windows invite in abundant natural light, framing lovely Park Avenue views to the east as well as tranquil tree-lined garden vistas to the south and west. A private entry foyer off the elevator welcomes your arrival, spilling into a central gallery enriched by a wood-burning fireplace, gorgeous hardwood floors, and stunning millwork. On either side sits a beautiful corner Park Ave-facing living room, and an elegant dining room with a striking bowed window, built-in banquette, and tranquil courtyard views. Open the custom floor-to-ceiling wood and frosted glass doors to both rooms to experience entertaining at its best, with a seamless flow from end to end for large-scale gatherings. Adjoining the dining room is a finely-appointed modern windowed kitchen with everything the chef could want, from premium-quality full-height cabinetry to top-of-the-line Miele and Sub-Zero appliances. Beyond is a large, private multipurpose room accessed by the kitchen and a separate service entrance. This ideal home office, extra bedroom, gym or staff quarters comes complete with a ½ bath that can readily be converted to a full bath, built-in, custom Murphy bed, new Miele washer-dryer in separate closet and a media center. An artful staircase ascends to the sleeping level with 3 peaceful bedrooms and 2 full stylish baths. The primary suite wraps you in luxury with custom-built-in closets, a huge dressing room with built-in cabinetry, and sumptuous spa bath with slab marble flooring and countertops, 4 custom built-in mirrored medicine cabinets, dual sinks and steam shower. An additional bedroom suite offers its own divine bath with shower and soaking tub, and the 3rd bedroom with a walk-in closet can serve as a perfect home office. Gigabit Fios and internet wired cabling throughout with 6 Tvs and whole-house Sonos audio system, through – the wall and central air, further enhance the upscale lifestyle. Designed by George and Edward Blum, 830 Park Avenue is handsome 12-story, prewar neo-Georgian style apartment building situated on the southwest corner of 76th Street. Amenities include a full-time doorman, common garden, plus bike and storage rooms. Pets are allowed, and pied a terre is accepted. The prized Upper East Side location is moments from Central Park, fine restaurants, fashionable boutiques, the 77th Street subway, and 79th street cross-town buses.