Transactions as regards the real Estates in Turkey must be performed before the Land Registry Offices(Tapu Dairesi).Therefore Marmaris Land Registy Office is the place where you should assign the title of the house.
The notary offices are solely authorised to arrange "contractual promise on estate purchase", yet this gives you not the title but only the right to file a suit meant for to force the seller to register the house in your name.