St. Joseph's College is comprised of three buildings: the old building which was erected in 1920, the chapel Block which was completed in 1925 and the new building which was opened in 1963 by Sir Robert Black. In 1968, in order to admit more students, the primary section was transferred to an independent establishment at 48, Wood Road, Wanchai. In 1974, St. Joseph's Kindergarten was established on the top floor of the Primary School Building. After years of expansion, St. Joseph's College now provides education for about 4,200 students in the Kindergarten, Primary and College.