401 Commonwealth was designed by Peabody and Stearns, architects, and built in1901-1902.
Plans for the house – including elevations, floor plans, framing plans, and detail drawings – are included in the Peabody and Stearns Collection in the Boston Public Library’s Arts Department (reference PS/MA.035). Unfortunately, although the plans include numerous drawings, they no longer include a drawing of the front elevation.
The images below, provided courtesy of the Boston Public Library, include the drawings of the rear elevation (on Marlborough Street), floor plans, longitudinal section, and elevations of the east and west party wall, showing the arrangement of the chimney flues.
The original plans are fragile and in poor condition, and these images have been enhanced to improve their readability.
Click on the individual images to enlarge them.