Complex sentence: John Penn Street in Greenwich, which once ran down one side of the works site, remains, as do the Penn Almshouses in South Street, built in 1884 in memory of the second John Penn.
Split into simpler sentences: John Penn Street in Greenwich, which once ran down one side of the works site, remains. As do the Penn Almshouses in South Street, built in 1884 in memory of the second John Penn.