It serves grades 9–12 as part of the Lucia Mar Unified School District (LMUSD).

The 800 wing contains the Inquiry Center, school farm, and other industrial, technology, occupational skills courses and additional science classes.

Its objective was "to repair, upgrade, equip and construct school facilities at Arroyo Grande High School, including the school library and restrooms, upgrade electrical wiring to accommodate technology, install energy efficient heating/ventilation systems, classrooms, cafeterias, plumbing, qualify for State matching funds, reduce overcrowding, by issuing $21,350,000 of bonds at legal interest rates, appoint a Citizens' Oversight Committee and perform annual audits to ensure that no bond money is wasted or used for administrator's salaries".

In 2006, the other classroom wings on the Valley Road side of campus were renovated, and a new swimming pool was completed on the old tennis court site.

The third phase included a new administration and student support center, and a new multi-purpose room with food services.