Categories Dupont Circle 1617 21st St. NW Post author By pickering Post date July 28, 2018 No Comments on 1617 21st St. NW 1617 21st st. 1617 21st St. is a three-story brick townhouse, with stone trim. It was built in 1890. ← 1627 21st St. NW → 2216 Massachusetts Avenue NW