Categories Mount Vernon Square 301 New York Ave. NW Post author By pickering Post date June 2, 2015 No Comments on 301 New York Ave. NW 301 New York Ave. NW Xin Guang Signs 301 New York Ave. NW is a three-story brick building, containing the offices of Xin Guang Signs. ← 639 Constitution Avenue NE → Marquis de Lafayette Hall