A stunning townhouse on a quiet, tree-lined street in the heart of the Upper East Side, this 21.5-foot-wide home spans over 6,500 square feet across five beautifully designed levels. With 6 bedrooms, 5 full bathrooms, 2 half baths, and two private outdoor spaces, this home has been masterfully renovated to balance elegance with modern sophistication. A 4-passenger elevator connects all floors, and 10-foot ceilings enhance the sense of scale and light. Garden Floor: Enter through a landscaped forecourt into a welcoming foyer that leads to a spacious chef's kitchen, fully outfitted with Viking and Sub-Zero appliances, two dishwashers, a large island, and radiant heated floors. An oversized pantry provides abundant storage, while the adjacent media room opens directly to a beautifully manicured garden (approx. 21'9" x 33'). In addition there is a full mechanical room, powder room, and convenient service entrance. Parlor Floor: An impressive formal gallery with a sweeping staircase anchors the parlor level. The living room, with a wood-burning fireplace, overlooks the garden, while the formal dining room faces south and is ideal for entertaining. This level also features a discreet powder room and provides access to the elevator. Third Floor: The enormous primary suite spans 20" x 14" and includes a dressing room, a Calcutta marble bath with radiant heated floors, Waterworks fixtures, a soaking tub, and separate shower. A spacious second bedroom (or office/guest room) and a full bath complete this floor. Fourth Floor: Designed for flexibility and comfort, this level includes three bedrooms, two of which have oversized closets and two full bathrooms. A dedicated laundry room with full-size washer and dryer adds everyday convenience and there is natural light from both north and south exposures. Fifth Floor: The top level offers exceptional versatility, with a gym, a home office, and an additional bedroom with a full bath. A private terrace (approx. 20'4" x 11'), provides a perfect setting for outdoor relaxation or entertainment. Additional features include: Two wood-burning fireplaces and an electric fireplace 12-zone Daikin Citi-Multi HVAC system with NEST control Humidifiers in all bedrooms Integrated AV automation and security system with wireless control and CCTV surveillance Cross- and rift-sawn white oak flooring throughout This exceptional residence brings together refined architectural detail, superior craftsmanship, and smart-home innovation. Thoughtfully curated for luxurious living and effortless entertaining, 435 East 87th Street offers a rare opportunity to own a distinguished townhouse in one of Manhattan's most desirable neighborhoods.