MAD expanded a 5,000 sf townhouse on the Upper East Side to more than 9,000 sf by extending it both horizontally and vertically. The enlarged seven story building houses a healthcare facility, primarily occupied by a growing neurological practice. Copper paneling and large glass openings animate rear façade, which is visible from the terrace above the fully built out ground floor. Windows offer tenants a variety ways to distribute the interior programs. An animated facade creates varying shadow throughout the day.