Architecturally unique in Vacaville, the Classical Revival old Carnegie building is located between the historic downtown and an older residential district. Vacaville is one of the fastest growing communities in the Bay area, but has tried to emphasize the remaining core of its old downtown. The Carnegie has been given new life by the Vacaville Redevelopment Agency with extensive renovation and a long term lease to the Chamber of Commerce.
Vacaville's library history began with an 1880's reading room established by the WCTU. In 1905 the Women's Improvement Club and Ulatis Book Club applied for Carnegie funding, but the city did not proceed with the legal steps for library organization. After the 1911 passage of state legislation permitting a wider library tax base through a high school district, the Vacaville Unified School District Library District was organized in 1912. Again Carnegie funding was requested and $12,500 was granted. It had brief celebrity as a restaurant called "The Library" in one of its several reincarnations. Later it was recognized as a significant contributor to the Main Street Historic District and acquired by the Vacaville Redevelopment Agency. Now Chamber of Commerce offices occupy the basement while the upstairs main library room, dedicated to late Chamber and community leader Glenn Miller, is available for receptions and meetings.