Designed by Herzog & De Meuron with Stephen Wang & Associates as the Architect-of-Record, 9-13 East 75th Street is a 5-story luxury townhome located on the Upper East Side of New York. Previously 6 stories high, the original three buildings are being combined into a luxurious single-family mega-mansion. The front façade design intends to maintain the visual individuality of the buildings, as if they appear to be 3 separate neo-Federal townhouses, while the entire rear façade is being replaced by glass and bronze appearing as one unit.