Clarkstown South building consists of a main lobby, large auditorium, gymnasium (including a wrestling room and a fitness center), music wing, planetarium, two lunchrooms, and three floors of classrooms.
The Clarkstown South building is described as having a central lobby, a large auditorium, a gym with a wrestling area and a fitness center, a music wing, a planetarium, two dining areas, and three floors dedicated to classrooms.