The school is split between two campuses: grades 7–9, the Middle School, at the former Westlake campus in
Holmby Hills and grades 10–12, the Upper School, at the former Harvard campus in
Studio City. A four-year renovation of the Middle School campus, completed in September 2008, replaced the administration building, the library, and the instrumental music building with a new library, science center, and administration office. The project also added the Bing Performing Arts Center, which has a two-level, 800-seat theater, a black box theater, and a dance studio. Buildings on the Upper School campus include: the Munger Science Center and computer lab; the Rugby building which houses the English department, 300-seat theater, costume shop, and drama lab; the Seaver building, home to the foreign language and history departments as well as administrative offices and the visitor lobby; Chalmers, which houses the performing arts and math departments, book store, cafeteria, sandwich window, and student lounge; Kutler, which houses the Brendan Kutler Center for Interdisciplinary Studies and Independent Research and the Feldman-Horn visual arts studios, dark room, video labs, and gallery. The athletic facilities include Taper Gymnasium, used for volleyball and basketball as well as final exams; Hamilton Gymnasium, the older gymnasium still used for team practices and final exams; Copses Family Pool, an Olympic-size facility; and Ted Slavin Field for football, soccer, track & field, lacrosse, and field hockey. The school also maintains an off-campus baseball facility, the O'Malley Family Field, in
Encino, California. The Upper School campus has the three-story Seeley G. Mudd Library, renovated in summer 2023, and
Saint Saviour's Chapel, a vestige from the days of Harvard School for Boys' Episcopal. In 2017, Harvard Westlake spent more than $40 million to buy Weddington Golf & Tennis, a 16-acre country club located less than a mile from the Upper School campus, with plans to build an athletics center on the location. Tuition for the 2024–2025 school year is $49,700, with a new student fee of $2,500. Other expenses—which include books, meals, and class activities—typically average $2,500 to $3,500—with an additional $3,000 to $3,600 for those who take advantage of the school's comprehensive bus service. Harvard-Westlake provided $14 million in
financial aid in 2023. That year, about 20% of the student body received financial aid, which averaged $33,500 for each student that received financial aid. == Academic achievement ==