The original Mahoney Library, at what was then the SRJC Petaluma Center, opened in Fall 1995. The Center grew very rapidly, and soon became an official campus of Santa Rosa Junior College. As the Petaluma Campus campus grew, the Mahoney Library quickly outgrew the space it occupied, and the plans for the expanded Petaluma campus included a greatly expanded Mahoney Library.

The new Mahoney Library building, opened in Summer 2008. The 35,000 sq. ft. building increased the library's original capacity by four times. It is located at the heart of the campus and is the centerpiece of the new eastern quadrangle.

Incorporating the latest in information resources, learning environments, and technology, the new library building offers

• 400 reader seats
• more than 50 computer workstations
• 24 i-Media viewing stations
• 8 group study areas
• a quiet study room (the Connie Mahoney Reading Room)
• a 25-station Library Classroom/TeachingLab
• a full-scope Media Services Department
• a conference and meeting room with video-conferencing capability
• a digital copy and print center

The Mahoney Library building houses approximately 22,500 printed books. For more information about the SRJC Library's book and periodical collections, see the Library Collections page.

The expanded campus and the new library building were dedicated on Friday, September 26, 2008 at 2:00 P.M.