This project consists of the renovation of a four thousand square feet duplex in the Osborne Apartments, a New York City landmark located at 57th Street and 7th Avenue.The work includes combining two rooms to create a large kitchen, renovating all bathrooms and bedrooms. Sustainable "green" materials are used in several areas: cork for the kitchen floor, and IceStone counter tops (a green material made of recycled glass). New, properly counterweighted, double hung wood windows glazed with insulating, laminated glass will improve the performance of the exterior wall by controlling heat loss, heat gain and noise transmission.Our approach carefully knits the new with the old by using traditional materials installed with traditional methods and finishes specific to this particular building (an iridescent floor tile in the bathrooms for example.).