Crestmoor High School opened in San Bruno, California in September 1962 to relieve congestion at Capuchino High School and Mills High School. It was the seventh high school to be built by the San Mateo Union High School District, based in San Mateo, California. Construction began in 1960 on a graded plateau in the Crestmoor district of San Bruno and took about two years to complete. The buildings, which are similar in design to those of Aragon High School, Hillsdale High School, and Mills High School, were constructed mostly of steel and glass, featuring expansion systems to provide earthquake resistance. The school, and its similarly designed schools, have been designed in an architectural style described as "postwar techno-optimism". The school was closed in 1980.