Planning fallacy
The Sydney Opera House was expected to be completed in 1963. A scaled-down version opened in 1973, a decade later. The original cost was estimated at $7 million, but its delayed completion led to a cost of $102 million.
Sydney Hospital
The deteriorated centre building was demolished in 1879 and in 1880 Thomas Rowe won an architectural competition held to find a new design with his Victorian Classical Revival design. Rowe was heavily criticised by his peers for the practice of under quoting building costs in order to win a competition, and the Sydney Infirmary was his "cause célèbre". Work halted for some years after partial construction, awaiting the approval of additional funds from the New South Wales parliament. Architect John Kirkpatrick completed the new hospital in 1894 to a revised design.