On average, Istanbul rental income is around 6% of the property price, per year. You can earn more or less than this rate, depending on your property, its location and facilities. To make the most of the rental income, you should target highly rentable project. In terms of size, these should be studios, 1 bedrooms, or 2 bedrooms as they are easier to rent. Also it is easier to rent apartments in compounds as people prefer to live in places which offer them certain amenities and a quality lifestyle.