In the 1970s, with the abolition of the grammar school system in the inner London area (i.e., under ILEA), the school became Comprehensive. In 1995, for reasons of space, the school moved to its present site following extensive refurbishment. The site had previously been occupied by the West Kent Grammar School, which closed in 1905 and the building was bought by the London County Council for the Brockley County Grammar School which opened in 1907. Prendergast had used the site for its Sixth Form Centre from 1983 to 1995.