[2][3] The Warner House is a 2+1⁄2-story brick structure, with walls 15 inches (38 cm) thick laid in Flemish bond.

It now has a gambrel roof; this is a later modification to what was originally a pair of side gable pitches with a deep valley between them.

The interior of the house follows a typical Georgian four-room plan, with an added kitchen wing in the rear.

Sarah and her 14-year-old daughter, Mary, moved to the Jaffrey Mansion, a few houses up Daniel Street.

Reportedly, he left a few broken windows at the Warner House and never paid his sister rent.

A group of local early preservationists led by Edith Greenough Wendell set out to stop the destruction.