The Rebecca Wood Watkin Architectural Collection consists of architectural drawings of remodelings, alterations, additions, and new designs of buildings, mostly residences, that Watkin worked on from 1940 to 1989. The locations, unless otherwise noted, are all in northern California.

Also in the collection are photographs of three projects: the Watkin residence in Kentfield, California; the Creek Apartments in San Anselmo, Marin County, California; and the Watkin residence in Placer County, California; and a 1956 article in Progressive Architecture on the Watkin residence in Kentfield.