20 East End Avenue,is a classically featured gray brick apartment building designed by Robert A.M. Stern Architects. This 17-story building features 43 apartments, including two penthouses, two duplex townhouses and a maisonette, on the corner of East End Avenue and 80th Street. The apartments, which will range from two to six bedrooms and have 11 to 12 foot ceilings. The top penthouse will have a terrace of more that 4,000 SF overlooking the Upper East Side and the East River. 20 East End Avenue will also feature a motor court, entered from 80th Street through an arch under the building; a conventional entrance off the avenue leading into an octagonal lobby with a 12 foot Venetian plaster ceiling and a patterned floor in white marble and limestone. A grand blackened-steel staircase will have a three story bronze hanging light fixture in the corner.