Very rare opportunity to buy a stately 20 foot wide townhouse on one of the most beautiful tree lined blocks on the Upper East Side. This townhouse currently consists of 2 separate and distinct duplex apartments. The possibilities are endless: live in one unit and rent the other out; keep as an investment property and rent both units; or combine both into a fabulous single family home! The first duplex unit, located on the first and second floors, spans over 2000 square feet with 2 oversized bedrooms and 2.5 bathrooms and boasts an amazing garden. The main level also includes a huge living/dining room with a wood-burning fireplace that leads to the peaceful outdoor garden retreat through floor-to-ceiling glass sliding doors. It also includes a windowed eat-in kitchen, powder room, and a laundry room. A sleek staircase leads to the second floor bedroom level with soaring 11 foot ceilings. This level includes a large rear-facing primary suite featuring a dressing room, walk-in closet and en-suite bath. The spacious sun filled second bedroom faces south and includes its own walk-in closet and private full bath. The second duplex is located on the third and fourth floors. The third floor entrance opens to a grand entertaining spaces which includes an elegant living room with soaring ceilings and a beautiful wood burning fireplace. One of the most gorgeous landscaped terraces on the UES highlights the space. This floor also includes a grand dining room/library, also with elegant moldings, and another wood burning fireplace. There is a well-appointed gleaming white kitchen, as well as a powder room on this floor. Up the staircase on the fourth floor is the large and serene primary bedroom with a tray ceiling and three sets of windows overlooking the terrace and gardens of the surrounding townhomes. The en-suite master bathroom is sun filled from a skylight and features a bidet, a large soaking bathtub, and a walk-in shower which can also be accessed on the other side through the second bedroom's en-suite bathroom. The spacious second bedroom overlooks 64th Street and is outfitted with built-in bookshelves and a wood burning fireplace. This floor also has a large dressing room, which could serve as a home office. There is laundry room on this floor as well. The basement level includes expansive storage, mechanicals, and is accessed from either unit. This exceptionally rare residence is located in the heart of the Upper East Side and has much to offer: gorgeous outdoor space, elegant prewar living, privacy, and proximity to all the splendid benefits and attractions of Madison Avenue, Central Park, and the Upper East Side.