Fortismere has an extensive campus in Muswell Hill with the North and South Wings comprising of modern buildings. The workshops and science block date from the late 1990s. A Learning Resource Centre, including Library and Sixth Form Study Area opened in April 2002. Food technology, reception and administrative facilities were added by September 2002. The school has its own playing fields, an all weather sports area and a heated swimming pool. A county standard sports hall with adjoining tennis courts and artificial sports pitch were completed in 2004. One of the original gymnasia has been converted into a dance studio. There is a centennial walkway and a car parking area.