The Aaron G. Green Collection spans the years 1939-2017 (bulk 1953-1999), and includes files created by Green and his firm Aaron Green and Associates. The collection is organized into four series: Personal Papers, Professional Papers, Office Records, and Project Records. The collection documents his career including his education, architectural practice, and association with Taliesin. His career focused on designing residential and funerary buildings, of which many are well documented in this collection.

The Personal Papers series includes biographical information as well as student notebooks and drawings from Green’s education at Cooper Union in New York City. Professional Papers contain correspondence with publishers and architects, writings and presentation materials, records relating to involvement with associations and committees, awards, research, reference files, and consulting files, including extensive files on judicature. The Office Records series include brochures, photographs, and news clippings that extensively document completed projects. The Office Records series also holds the Chronological Files subseries, which includes the vast majority of project correspondence in chronological order.

Project Records containing drawings, photographs, and files comprise the majority of the collection and span the entirety of Green’s career. Well documented projects include The Newark Community Center and Library (1966, 1982), The Union City Civic Center (1974), St. Stephen's Catholic Church (1969) and St. Elizabeth Seton Catholic Church (1987). Green also designed many cemeteries and mortuaries, including the addition to Julia Morgan's Chapel of the Chimes (1955), and a mausoleum, columbarium and Chinese cemetery at Skylawn Memorial Park, San Mateo (1983).

The Aaron G. Green collection contains a small number of born-digital materials, mainly photographs (in jpg and tif formats) that were taken of project drawings for inclusion in the Randolph Henning book on Green. Some CAD files exist for the American Hebrew Academy project, but those files have not been assessed.