A competition to design a permanent Exhibition Building in Melbourne was announced late in 1877. Joseph Reed of Reed & Barnes architects was announced the winner in May 1878, and by February 1879 construction in Carlton Gardens was underway. In May 1879 the Exhibition commissioners sanctioned the addition of two permanent machinery annexes and 100,000 square metres of temporary annexing following a huge demand from foreign exhibitors. The permanent annexes were designed by Reed, while Messrs Walker & Haliday were commissioned to design and build the temporary annexing.The Exhibition Buildings and redesigned Carlton Gardens were finished in time for the opening of the Melbourne International Exhibition on 1 October 1880, although touch-up works continued for about a month after that date.