Australia Square nominated for NSW State Heritage Register

One of Australia’s most complete modernist urban ensembles, Australia Square is being considered for listing on the NSW State Heritage Register.

Completed in 1967, Australia Square is widely regarded as one of Australia’s most significant examples of Modernist architecture. Combining a 50-storey circular office tower, a lower slab block of 13 floors and a public plaza featuring major works by international artists, this carefully designed ensemble carved out a new form of urban space in Sydney.

The landmark project was developed and built by Lendlease founder Dick Dusseldorp and designed by architect Harry Seidler, with the tower engineered in association with renowned Italian structural engineer Pier Luigi Nervi. At the time of its completion, Australia Square was the tallest building in Sydney and the tallest lightweight concrete building in the world.

Australia Square is also notable for its integration of international art. Seidler commissioned renowned American sculptor Alexander Calder to create a major work for the forecourt, while a mural by New York artist Sol LeWitt was later commissioned for the building’s lobby.

In 2012 GML worked with Harry Seidler and Associagtes to develop The Architectural Guidelines for Managing the Future of Australia Square, a key tool for decision making about the ongoing care and management of the site. The overall goal of the Guidelines was to conserve significance while supporting the need for the place to retain its commercial relevance and position.

Rebecca Hawcroft, Head of Heritage Places, welcomed the nomination: “Australia Square is a remarkable example of Australian Modernism, combining exceptional architecture, urban design and public art. State heritage listing would recognise its considerable significance and its unique place in Sydney’s modernist urban fabric.”

Community feedback is open until 18 September 2026 and will help inform consideration of the nomination. Have your say online.