W. A. Mason House  The W. A. Mason House is an historic house at 87 Raymond Street in Cambridge, Massachusetts. The 2-1/2 story wood frame house was built in 1846 and extended to the rear in 1867, giving it a T shape. Its massing is Italianate as are its decorative window hoods, but its corner pilasters give it a Greek Revival character. The main entrance is accessed through a single-story porch occupying the front crook of the T. W. A. Mason, for whom it was built, was a city surveyor who was responsible for surveying and platting a significant amount of the city in the 19th century. The house was listed on the National Register of Historic Places in 1983.