Houses at 2501-2531 Charles Street
 The Houses at 2501-2531 Charles Street in the Perry South neighborhood of Pittsburgh Pennsylvania USA were built in 1885. The row originally included 25 nearly identical houses 13 feet wide and 35 feet deep. All but 2 of the buildings survive. They each have two rooms on the first floor a parlor and a kitchen and two bedrooms on the second floor. A third bedroom comprises the third floor behind the mansard roof.