Urban transformation, after as one of the century's greatest disaster for Turkey called 17 August 1999 Marmara and 12 November 1999 earthquake in Duzce occupies places of the country's agenda. These earthquakes have shown that the majority of structures are in danger. In this context; with the idea that it would be difficult to demolish and rebuild each building individually, some regulations were adopted from time to time in the country and field based transformation studies were encouraged. However, in one of the most important metropolises of the world such as Istanbul, to make a transformation process in accordance with international standards; due to the city's history, crowdedness, the bad urbanization made up to now for individual earnings, does not seem easy. In this study, information about the urban transformation studies have been performed until recently in Turkey are given. By evaluating the results, suggestions have been made on how to make a transformation planning.