1234 E. 56th St. Our most expensive listing featured. This 6-bedroom, 5-bath home has 6,300 square feet of living space. Built in 1904 and located on Professor's Row on a double lot, the property gives and gives: a 2-story attic, finished basement, lots of outdoor entertainment space. Original details are intact, including the magnificent front doors, the carved handrail on the staircase and authentic light fixtures. Repped by Jennifer Ames of Coldwell Banker.