The facilities at the main site include a 160-seat theatre, a science block and garden, art and music studios, an ICT suite, and library.

An indoor swimming pool and sports hall are on site; use is also made of rugby and football pitches at St.James' Primary School, and cricket pitches and athletics facilities at Sunbury Cricket Club In 2017 the school announced it was to phase out the sitting of the Common Entrance examination at age 13 (Year 8) and the two academic years leading up to them.

All boys would select their future schools in Year 6 and, if required, sit 11+ entrance exams for them, and then leave at the age of 11.

This change was made in order to follow the trend of senior schools preferring to admit the majority of their pupils at that age.

In particular, in recent years pupils and staff at the Mall have raised thousands of pounds to provide brand new classrooms for Chitsime School.