Treasury Building, Brisbane, Renaissance Revival government building in Brisbane, Australia

The Treasury Building is a Renaissance Revival structure made of sandstone occupying an entire city block in central Brisbane, bordered by Queen Street, George Street, Elizabeth Street, and William Street. Built in three stages between 1886 and 1928, the building now houses a casino along with dining and bar venues within its heritage spaces.

Construction took place between 1886 and 1928 following the designs of architect John James Clark rather than competition winners. This staged development reflected Queensland's growing importance during the colonial period.

In 1901, the Governor of Queensland, Baron Lamington, read the proclamation of Australian Federation from a balcony on the William Street elevation. In the 1890s and early 1900s the building was a focus for celebratory and patriotic displays. From 1995 to 2024 it housed the Treasury Casino, and Griffith University announced in September 2024 that it would buy the building for an inner-city teaching campus.

The building is easy to locate as it fills an entire block in the business district bounded by four major streets. Visitors should note that portions now function as a casino, so some areas may have restricted access while others remain open to the public.

The site was reserved for government use from 1825, when convict-built officers' quarters and a two-storey military barracks stood here. The military left in 1864, and the Registrar-General, Treasury and Engineer of Harbours moved into the existing buildings. The 1874 Registrar-General's office was demolished in late 1922 to make way for the third stage.