The Stanley Mosk Library & Courts Building (formerly the State Library and Courts Building) is one of two buildings of the Capitol Extension District at Capitol Mall. Designed by Weeks & Day, the building features works by sculptor Edward Field Sanford Jr. and muralists Maynard Dixon and Frank Van Sloun. It houses the California State Library and the California Court of Appeals.
Carey & Co. completed a rehabilitation project, including HVAC, fire, life safety, plumbing, electrical, security, elevator, ADA and tenant improvements. The project also included restoration of two interior lightwells, envelope repairs including granite and terra cotta, landscape upgrades and sustainable design. In 2016, the building was certified LEED Silver.