(These two small buildings have since been re-located about to the south against Cordelia Street.) New windows were installed in the rear wing in 1927. By the late 1920s, South Brisbane's heyday was over. The progressive City of South Brisbane had been absorbed in 1925 by the new City of Brisbane, and South Brisbane had lost much of its civic focus. Many of the larger residences were being converted into flats by the mid-1920s, and young families were moving to the less crowded workers' dwellings suburbs, like Annerley, Greenslopes and Coorparoo. Enrolments at both Brisbane South Girls & Infants School and Brisbane South Boys School were declining. In December 1928, Department of Public Instruction approval was given for alterations costing to the Girls & Infants School, for conversion to an Intermediate School. On 31 December 1928, the two existing South Brisbane state schools were closed, and on 1 January 1929, the former Boys School was re-opened as the combined Brisbane South State School. At the former Girls & Infants School, the exterior walls were rendered, the rooms were partitioned, and the front porch was removed, and the building was re-opened in August 1929 as Brisbane South Intermediate School. In 1930, plans were prepared to extend the 1864 wing of the Brisbane South Intermediate School by an additional four bays to the southeast, virtually doubling its size. The contract for this work was let in 1932, at a cost of . Intermediate schools, equipped with workshops, laboratories, and domestic science rooms, were established in principal Queensland towns after 1928. They reflected a fundamental change in Queensland education policy in the late 1920s, focussing on syllabus revision and the education of children over 11 years of age. In Brisbane, Intermediate schools were established as separate institutions, but in country areas, they formed part of existing high schools. They catered for children 12–13 years of age, offering a two-year course as a link between primary and secondary education. Setting up new schools for a two-year course proved expensive, and the Intermediate school concept was replaced in the 1940s and 1950s by multilateral high schools offering a variety of courses. Brisbane South Intermediate School was closed on 31 December 1953. In the late 1940s, the deteriorating condition of the Brisbane South State Primary School building (erected 1888), had prompted proposals either to close the school, or to transfer to another site. The decision was postponed for some years, but by March 1954, the cost of repairs to the 1888 building was considered too great, and recommendation was made to transfer the school to the premises formerly occupied by the Brisbane South Intermediate School.