The Roundhouse Administration and Sales Centre was opened by the then Minister for Housing and Co-operative Societies S. T. Stephens MLA on 29th March 1969. The whole estate was designed by Robert Sully, renowned Californian urban planner and architect. He also designed the Roundhouse and provided plans for an Aboriginal Art Gallery which was never built.
The Roundhouse building was built as the Administration and Sales Office in 1969.
The Roundhouse building as the Administration and Sales Office in 1972.