I've not had dealings with the company. But I just wanted to say, that (if you haven't already...), make sure you go to the Belediye and ask about permission first. Alot of companies, and builders alike will tell you that they can do it, and it's not a problem. But if a complaint is made, (you are 'officially' altering the exterior plan of the property), then you as the home owner are liable for the fines etc that may occur at a later date.