Sydney Opera House
The cost of the project so far, even in October 1966, was still only $22.9 million, less than a quarter of the final $102 million cost. However, the projected costs for the design were at this stage much more significant.
Point Piper, New South Wales
John Symond's mansion on Wingadal Place, reportedly cost over 70 million to build (excluding land), easily making it Australia's most expensive, privately owned residential home. In 2007, "Altona", located in Wunulla Road and Australia's second-most expensive house, was listed for more than $50 million. It was sold in 2013 for a price thought to be more than $50 million, which was a Sydney record.