It is popularly known as the ‘Upside-down building’ and has a highly distinctive form that resembles an upturned pyramid or ziggurat. This effect is produced by the progressively broader cantilevering of the upper floors and is emphasised by regularly repeating concrete spans. The setback allows for surrounding plazas on three sides. Vast areas of glazing contribute to its distinctive appearance and the provision of natural light and expansive views internally.

The building was created to provide office accommodation for multiple government departments and agencies, and this use continues. The foyer contains a large mosaic mural by the then State Government artist Harold Freedman which is a finely produced work on an enormous scale.

The mural’s content is characteristic of a mainstream 1970s view of Australian history and both its depiction of Aboriginal people, and the nature of European colonisation are disrespectful by contemporary standards.