The campus of what was called the NEW Lowell High School opened in the early 1960s, and replaced the old brick campus building on Masonic Street that is still used by the district for offices and an adult school. The "new" Lowell campus itself consists of a main three-story academic building with two extensions, the easternmost extension being a single-story science building which was totally rebuilt and reopened on September 21, 2003, after the original building from the early 1960s was demolished because the labs were totally antiquated The second extension consists of a single story free-standing world-language building, which replaced temporary classrooms.