Foreign owners of Turkish property have to pay capital gains tax in Turkey on the sale of their Turkish property. The rules about payment of capital gains tax depend on when you purchased your property as follows:
For property purchased (title deeds registered) before March 2007
If the property has been owned for 4 years at the date of transfer/sale to the new owner then no capital gains tax is owed.
For property purchased (title deeds registered) after March 2007
If the property has been owned for 5 years at the date of transfer/sale to the new owner no capital gains tax is owed.
If capital gains tax is due to be paid then the level of the tax is calculated from the difference in the gain in value shown on the title deed when purchased and when sold. This difference is then taxed according to the income tax bands in force in the year of sale. Tax starts at 15% and rise to 35%. If in doubt contact a local accountant for further advice.
A note on brand new property: For brand new property should you sell within one year of purchase there is also an exemption to capital gains tax but sell outside of the first year and you will have to wait for 5 years before being capital gains tax free.