The Modern TownhouseREINTERPRETED, RECONSIDERED, REDESIGNED.Beginning with a 22 foot-wide carriage house, with approximately 10,822 sf interior and approximately 2,189 sf exterior, on a prime upper east side block, this extraordinary reconstruction - executed by architect Toshiko Mori - features a wealth of technological achievements blended skillfully with expertly sourced materials to create a 21st Century residence which will truly redefine ''how we live.''Once an entryway for incoming carriages, the center double doors of glass are adorned with wrought iron. Two other entrances on either side allow for multiple use entry points. Inside the foyer, two oak doors open to the gallery space while a separate stair leads up to the residence or down to the spa and wine tasting room.The gallery walls are reinforced to support three times the weight of a typical residential wall, ideal for art installations of any size. With custom lighting throughout - there are over 580 lighting fixtures in the house - the gallery walls are pre-lit for art installations. This floor also includes a powder room and office. Connected by a sculpture garden, the gallery space opens to a spectacular centerpiece: an interior waterfall measuring 22 feet wide by 23 feet tall. Carefully tuned to fall at a velocity deemed most soothing to the human ear, the waterfall and reflecting pool is an ever-changing work of art bathed in natural light by two additional lot-line windows and a skylight.The parlour floor entertaining level comprises a grand living room, a spacious kitchen, powder room, pantry, bar, and superb dining room lit on either side by lot-line windows and a wall of Bendheim glass overlooking the waterfall and reflecting pool below. Thermador appliances, Aquapure water filtration, and Toshiko Mori-designed cabinetry and faucets make the state-of-the-art kitchen an ideal setting for any chef.The third floor master suite features a powder room, full bath, Dornracht steam shower, Kohler ''tea for two'' bathtub, an abundance of closet space, a large library or office in front and a serene bedroom space in the rear. Off the master suite is a grand terrace with planted grass, wood decking, and a skylight looking down onto the waterfall. With stair access closed off by double-doors, the master suite can be accessed directly from the elevator.Floors four, five, and six comprise four bedrooms, five full baths, a separate office, playroom, or guest bedroom with vaulted glass windows on the front faade. The roof garden is a planted, green space featuring a LiveRite auto-irrigation system. The residence features: Mitsubishi City-Multi HVAC system German-engineered Shuco Window SystemADA-complying commercial grade elevatorTGP 2-hour fire-rated lot-line steel windowsFinland sauna with full height cedar walls1,000 bottle capacity wine cellar front glass window and testing barSolid quarter-sawn 4 inch maple hardwood flooringCustom-cut Thassos-honed Greek marbleWith over 40 windows throughout, ceilings ranging between 9 feet and 12 feet, a full sauna and spa in the basement level as well as its own private gallery, this home also incorporates green systems wherever possible, reducing the energy use at every turn. It truly answers the question: what can the modern townhouse become?