Located on an idyllic tree lined block off of Park Avenue, this classically detailed 10 into 9 room duplex apartment features 4 bedrooms and 4 bathrooms perfect for entertaining and everyday living. Luxurious prewar features throughout include 9 ft beamed ceilings, handcrafted moldings, and gracious dimensions, while additional updated features including a dedicated proper laundry room make this the perfect Upper East Side home. Enter through the elegant foyer and step into the formal living room with 4 tree top windows providing a serene exposure which provides ample light throughout the day. Opposite the living room are a large formal dining room and kitchen, which could readily be combined to create a large open style eating and living space. The main floor offers a commodious master suite with cavernous walk-in closet, beyond which is an updated master bathroom. The luxurious powder room completes the main floor. Down the staircase are an additional 3 bedrooms, each with en-suite bath, and a den that provides the perfect space to watch a film, read a book or catch up on paperwork. This level also includes an abundance of storage and a landing with separate entrance to the lower floor. 124 East 84th Street is a lovely, well-serviced boutique cooperative building. Doorman from 8:00am to 12:00 midnight. Live-in super. Storage units, bike room and laundry room in basement. The 4,5, and 6 trains are just two blocks away, and the schools, shopping, dining, museums and other conveniences of the Upper East Side are literally right outside the front door. 3% flip tax.