In 1906, the "school on wheels," as it was often called because of its inability to secure a permanent location, finally settled in Huntington Beach and began operation as Huntington Beach Union High School. Classes were initially held in the basement of an auditorium operated by the local Methodist church. Having received a land grant from the Huntington Beach Company, the high school completed construction of its first permanent buildings at its current location in 1908. By 1910, there were seven teachers and three clubs; Huntington Beach had a population of 815 people. By this time the four graduates had become an average of 14 graduates a year. The first graduating class consisted of six students, but expanded rapidly in the next decade into the hundreds.
In 1921, the Huntington Beach Company increased mining in abundant oil fields around the city bringing a wave of prosperity to the area.
In 1926, the school's architects, Allison and Allison (a Santa Ana firm), described the school's structure as a Lombard Romanesque Revival. The iconic bell tower and auditorium were the first buildings constructed, and seven other buildings were built between 1926 and 1952.
Huntington Beach High School is known for its bell tower and auditorium. They were originally built in 1903 and were rebuilt in 1926.