The Hayden Building is a historic building at 681-683 Washington Street in Boston, Massachusetts.The building was built in 1875 and added to the National Register of Historic Places in 1980. Designed to act as commercial retail space, this four story brownstone building shows little of the ornamentation generally associated with Henry Hobson Richardson. It is the last surviving commercial retail building designed by Richardson in Boston. The building is in Boston's Chinatown neighborhood.