In 1984 the City looked toward the future of the Plano Public Library System and passed a $3,850,000 bond for the acquisition of three sites, the construction of a third facility, and collection upgrades for existing libraries.
Through the generosity of the W. O. Haggard, Jr. family, in 1986, the City acquired a 6-acre site for a third library facility. The 40,000 square feet W.O. Haggard, Jr. Library opened in May 1989 with a collection of 41,000 volumes. The 20,000 square foot basement was unfinished. In 1996 10,000 square feet of the basement was finished to house library administration and technical services. In 2001 a bond election passed, providing $3.53 million to expand the circulation and children's areas and parking lot. The Haggard Library closed in July 2004 for the expansion. Another bond election passed in May 2005, providing two million dollars for relocation of the Genealogy Center from Harrington Library to Haggard Library as well as fixtures and furnishings. The library reopened in December 2005 with 40,000 square feet on three floors.