Marshall was originally constructed in 1925 and is currently comprised of 79 classrooms, a library, two computer labs, a staff room, two multi-purpose rooms/cafeterias, two gyms, and multiple athletic fields. The school recently modernized the library and added a computer lab. An ADA ramp was added to the music building and pavers were installed in the north quad. The original gym and locker room facilities have been renovated and updated. Six new tennis courts were installed.
Electrical upgrades are completed in the 'A' Building. Wireless Internet has been installed across the entire campus. The auditorium was renovated to include new acoustics, lights, stage, and refurbished seats.
Marshall provides a safe and clean environment for students, staff, and volunteers. The district governing board has adopted cleaning standards for all schools in the district. Basic cleaning operations are performed on a daily basis throughout the school year with emphasis on classrooms and restrooms. A joint effort between students and staff helps keep the campus clean and litter-free. The principal works daily with custodians to develop sanitation schedules that ensure a clean, safe, and functional learning environment.
A scheduled maintenance program is administered by Marshall's custodial staff on a regular basis, with heavy maintenance functions occurring during vacation periods. Additionally, a scheduled maintenance program is administered by Pasadena Unified School District to ensure that school grounds and facilities remain in excellent repair. A work order process is used when issues arise that require immediate attention. Emergency repairs are given the highest priority; repair requests are completed efficiently and in the order in which they are received.