Prior to 1987, children of the Parish of All Saints, Liverpool could choose to receive a secondary Catholic education by attending Patrician Brothers' Boys High Liverpool and Saint Mary's Girls High Liverpool and receive the NSW School Certificate as their highest certification. In 1984, an action group of parents, chaired by Ray McMahon, was established to raise support for the establishment of a Catholic senior secondary school in Liverpool. Such a development was already a priority of Liverpool Parish priest Father Roth Delaney and together they lobbied government and Catholic education office bearers while raising community support and funding for the school. Originally planned for Ashcroft, land negotiations lead to the final site location in Leacocks Lane, Casula. In 1987, All Saints Catholic Senior High School, was established by the
Roman Catholic Archdiocese of Sydney and classes began in temporary demountable classrooms on 2 February 1987 on the site of St Mary's High and Patrician Brothers' High, Liverpool. Following a rapid ten-week construction, the current Leacocks Lane campus was opened in 1988 with 380 students and 29 teaching staff. The College was officially blessed on Sunday 27 March 1988 by Archbishop
Edward Clancy after which permanent building construction began. ==Other names==