 Secondary entrances are located at the corners of the intersecting wings, with stairs leading to first floor porticos at the front of the building, and ground floor porticos leading to the undercroft at the rear.A two-storey extension (1959–60) which adjoins the southern end of the block is not of heritage significance.Ornamented with a Spanish Mission-style decorative treatment, the building is constructed from red face brick walls with rough-cast concrete render to the entrance bay walls and smooth render to undercroft walls, window sills and lintels, and panels below the first and second floor windows.