Federal townhouse in Charlestown’s gas light district asks $1.7 million

The bones of the 1,080-square-foot, seven-room townhouse at 19 Elmwood Street in Charlestown’s gas light district date from 1860.

The three-bedroom, two-bathroom interior retains some of that 19th-century charm in its molding, ceilings, and stairwell, never mind its federal-style facade. There is also a courtyard out back.

The whole shebang is asking $1.675 million through the Carucci Group at Gibson Sotheby's International—which means, at $737 a square foot, it could be seen as a relative deal in the Boston housing market.