the crown jewel of downtown positioned atop 551 west 21st street, this one-of-a-kind penthouse offers a rare opportunity to own a full-floor residence with remarkable scale, privacy, and design. recently completing a meticulous three-year renovation in late 2024, the home has been fully reimagined to the highest standards of contemporary luxury. spanning approximately 6,500 square feet of interior space and 4,535 square feet of private outdoor areasincluding the buildings entire rooftopthis five-bedroom residence redefines downtown living. at its centerpiece is a striking 61-foot private swimming pool, the largest private outdoor pool in new york city, creating a sense of retreat rarely found in urban life. a private parking spot is included in the sale. designed by acclaimed firms ingrao design and de la torre design studio, the layout emphasizes openness, light, and seamless flow. the lighting design work was performed by internationally recognized lobservatoire. the interiors layer natural materials and precision detailing to create a space that feels both elevated and effortlessly livable. every element has been thoughtfully considered, resulting in a residence that is as functional as it is refineda truly exceptional home in the heart of manhattan. gallery / entry - enter through dual private elevator vestibules on the east and west sides, each outfitted with 500-pound custom doors that blend architectural drama with enhanced security and privacy. the east and west entrances have distinct designs, offering a unique experience when entering from either side. - wide-plank schotten & hansen flooring extends throughout the core central part of the residence, lending a warm, modern elegance. - all windows are fitted with motorized shades crafted from a single piece of premium fabric, programmed with a seasonal automation system to optimize natural light and comfort year-round. - eighty percent of the homes windows feature soaring vision glass that rises nearly 18 feet, creating an extraordinary sense of openness and connection to the outdoorsa design element rarely found in private residences anywhere in the world. - cabinetry and interior doors are constructed from top-tier materials, with extra-thick panels for durability and weight. each is finished with custom-made hardware, elevating both function and design. - the home features fully integrated smart systems designed by osbeeknown for their precision, innovation, and white-glove service in high-end residencesincluding crestron controls, a comprehensive security system with cameras, and a premium av setup for effortless, modern living. living spaces - the living room features 18-foot floor-to-ceiling windows that frame sweeping views of the hudson river, with both south and west-facing exposures of manhattan, including unobstructed views of the statue of liberty. - furnishings include custom-designed pieces by artistic frame and selections from leading luxury designers, chosen for their quality, craftsmanship, and enduring style. kitchen - a bespoke chefs kitchen designed by world-renowned chef jean-georges vongerichten and executed by lanserring, featuring refined cabinetry and precision-built appliances. - fully equipped with a gaggenau espresso machine, refrigerator and freezer column, steam oven, microwave, vacuum-sealing drawer, warming drawer, wine cabinet with a wine guardian professional-grade cooling unit, and dual dishwashers. - anchoring the kitchen is the lacanche sully 2200a handcrafted, 87-inch french range combining professional-grade performance with timeless brass and enamel finishes. - with dual ovens and customizable cooktop configurations, the sully 2200 is the ultimate in form and culinary function. primary bedroom suite - framed by panoramic hudson river views, the expansive primary suite features generous closet space and transitions into an impeccably appointed ensuite bath. - the ensuite bath offers a spa-caliber experience