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.
Süreyya Opera House
By the beginning of 2006, Kadıköy Municipality under Mayor Selami Öztürk launched a redevelopment project after leasing the building in August 2005 from Darüşşafaka Association for a term of 40 years. The restoration included the frescos at the ceiling and on the walls, and the sculptures on the facade. The construction works lasted almost two years and the cost amounted to around 14 million YTL (approx. $9m).