Improvements to the school's sporting facilities were made post-World War II with the addition of a swimming pool in 1956. Changes to the Depression-era brick school building have occurred during its lifetime; however, the building remains substantially intact and retains a high degree of integrity. In 1962 a tuck shop was built at the southern end of the undercroft. In 1977 part of the first floor northern wing was remodelled for a Remedial Resources Room. Between 1998 and 2000, under the Building Better School initiative, alterations to the central range included demolition forming wide openings in the masonry walls to combine classrooms, replacement of double-leaf doors with singles, division of the northern teachers' room to form a health room and office, and conversion of the cloak rooms to offices and kitchenettes. The classroom at the western end of the second floor of the southern wing was also extended to occupy the corridor, with the corridor wall removed and a partition and doorway inserted. Cloak rooms in the wings have been enclosed for use as staff or store rooms, and folding partitions between many of the classrooms have been removed to combine classrooms. Bulkheads remain demonstrating the original layout, and two sets of early folding partitions are retained in the southern wing. The suburban timber school building has been subject to alterations associated with the 1950s additions, but remains fairly intact internally and retains its early three-classroom layout, decorative pressed-metal lined and coved ceilings, square ceiling-rose vents and metal tie rods. The prominent ventilation roof fleche appears to have been removed by 1974 (likely associated with re-sheeting of the roof) but the verandah wall framing retains evidence of former floor-level ventilation flaps either side of the doors. Traces of a partition that divided the central classroom from are also evident in the ceiling. Modern partitions have formed small offices in the eastern (1955) classroom. Since the major expansion during the 1950s, other buildings have been added to the site. A dental clinic was erected in 1975, and in the 21st century prep school buildings were constructed west of the suburban timber school building (2006–14), a resource centre (2009) was built to the north of the brick school building, and a school hall (2011) was erected on the double tennis courts' site adjacent to the swimming pool on the northern side of the school, which in 2016 houses the WWI honour board. Nundah State School celebrated its centenary during September and October 1965. Celebrations included a fancy dress ball at Cloudland Ballroom; the opening of a new Centenary Library; a church service in the school grounds, an open day at the school, a concert by Infants School children, an operetta by Grade 7 pupils, an open swim at the school pool, and a procession from Nundah to the school playing field for its Centenary Fete.