As the surrounding community modernized through the 1950s, the Castro Valley Library grew larger and larger: by 1950, the library had around 17,000 books, dwarfing its sister Brooder Branch (which later closed its doors in 1965). However, despite its increased size relative to its predecessors, the Castro Valley branch found itself surrounded by the newly constructed Castro Village shopping center. Following Mrs. Booth’s retirement in 1959, the property containing the tankhouse was sold to the Castro Village. Plans to relocate the library had been underway for a few years by that point; in 1958, a year prior to Gertrude Booth’s retirement, Alameda County purchased a spot of land on Redwood Road to serve as the library’s new location. For the first time, the Castro Valley library would have a home built specifically to function as a library, designed to modern standards.