Welcome to Residence 4/5G, a truly unique corner duplex and the largest two-story home in the building. Spanning approximately 2,313 square feet, this turnkey residence offers the privacy and scale of a townhouse while enjoying the convenience and service of a full-service condominium. Sharing only one wall with neighboring apartments, the home provides a rare sense of quiet and seclusion in the heart of Manhattan. Upon entering, you are immediately greeted by soaring double-height ceilings and a dramatic 15-foot glass curtain wall that floods the living and dining areas with natural western light while showcasing open views across the Midtown skyline. Automated shades and updated cherry wood floors complement the expansive entertaining space, while an adjacent library offers exceptional flexibility as a home office, media room, or potential third bedroom. The chef's kitchen has been thoughtfully designed for both everyday living and entertaining, featuring a Carrara marble island and premium appliances including a Sub-Zero refrigerator, Gaggenau cooktop, Thermador double ovens, and an in-unit washer and dryer. A striking architectural staircase leads to the private bedroom level, where floor-to-ceiling sound-insulated glass creates a peaceful retreat while maintaining the dramatic openness of the duplex. The primary suite easily accommodates a king-size bedroom set and features a custom walk-in closet and a beautifully appointed marble bathroom with double vanities, a soaking tub, and separate glass-enclosed shower. The oversized secondary bedroom measures an impressive 28 feet in length and offers an abundance of closet space, making it larger than many Manhattan living rooms. Additional upgrades include a new high-efficiency HVAC motor installed in 2026 and an automated curtain system throughout the bedroom level. Residents of Three Ten enjoy an exceptional level of service, including a 24-hour doorman, concierge, valet services, fitness center, and private landscaped courtyard. The building is pet-friendly, smoke-free, and meticulously maintained, with regular HVAC servicing and bi-annual professional window cleaning included. Ideally situated in Midtown East, moments from Whole Foods, Trader Joe's, Bloomingdale's, and some of the city's best restaurants, Residence 4/5G offers a rare combination of size, privacy, flexibility, and value. Whether as a primary residence, pied-à-terre, or investment property, this home stands apart. Priced at a significant discount to today's replacement cost, this is a compelling opportunity within one of Midtown's most discreet and desirable luxury condominiums.