Perched atop the coveted House Collection at Extell's acclaimed 50 West 66th Street, this extraordinary triple mint, top floor South side residence presents a rare opportunity to own the building's first resale offering - a true mansion in the sky spanning approximately 4,445 square feet, this exceptional home with soaring 12-foot ceilings, dramatic floor-to-ceiling windows and breathtaking open city views. Bathed in natural light from sweeping west, south, and southeast exposures, the residence showcases open city views, spectacular sunsets, and the enchanting evening glow of Lincoln Center. Masterfully reimagined by renowned architect Clive Lonstein, the home achieves the perfect balance of grand-scale entertaining and sophisticated everyday living. A dramatic great room serves as the centerpiece of the home, framed by floor-to-ceiling windows and exceptional proportions rarely found in new development condominiums. The bespoke eat-in kitchen by Smallbone of Devizes is both elegant and functional, appointed with premium Sub-Zero and Miele appliances, custom cabinetry, and refined finishes throughout. Originally conceived as a five-bedroom residence, the home offers exceptional flexibility to accommodate a variety of lifestyles. The current layout is configured as a sprawling three-bedroom residence with a library/home office, den, and five-and-a-half bathrooms. A gracious central gallery thoughtfully separates two private bedroom wings, creating an ideal sense of scale, privacy, and flow. The home was designed to be easily converted back to 5 bedrooms. The serene primary suite is a private sanctuary unto itself, featuring substantial custom closets, a luxurious marble spa bath clad in Bianco Dolomite and Grigio Carnico marble, and an adjoining sitting room. This versatile space can easily function as an additional bedroom, private lounge, nursery, dressing room, or expanded walk-in closet, allowing the suite to evolve with changing needs. A richly appointed library/home office with an en-suite bath further enhances the residence's versatility and may also serve as a guest suite or additional bedroom. In the secondary wing, two generously proportioned bedrooms each enjoy beautifully appointed en-suite baths and exceptional privacy. An additional den provides the perfect setting for a media room, playroom, family room, or informal gathering space. Top-floor House Collection residences of this scale, quality, and pedigree rarely become available. Residents of 50 West 66th Street enjoy a porte-cochere entrance and access to more than 50,000 square feet of world-class amenities, including indoor and outdoor swimming pools, basketball, pickleball, and squash courts, a state-of-the-art fitness center and spa, elegant lounges, entertaining spaces, and hotel-caliber services. Perfectly positioned moments from Central Park and Lincoln Center, this exceptional residence sits at the crossroads of the Upper West Side's finest dining, culture, shopping, and transportation. Working Capital Contribution equal to two months of common charges payable by purchaser. Co-Exclusive With Brown Harris Stevens/Leslie Singer