After 2002 economic restructuring encouraged the growth in Turkey. Between the years 2002 and 2006, Turkish economy has grown by 7.5%. Consequently, private consumption expenditure have increased by 8% annually, by 6% per capita and private sector investments in fixed assets have increased by 23%. In parallel, the housing and commercial real estate sectors have also demonstrated a considerable growth. Foreign capital investments and the shares of international investors in commercial real estates have also increased. In this paper multi-centre development of Istanbul is investigated with respect to Office, Retail and Residential markets. The Central Business District of Istanbul begins with the Barbaros Boulevard, continues along the Büyükdere Avenue and reaches to Maslak. The high-rise plaza type offices on the Esentepe-Zincirlikuyu-Levent-Maslak direction have contributed to the development of this central business district. This paper investigates and models the possible outcomes of additional 3 million population among districts of Istanbul as the local planning authority predicts.