||In the international discussion on housing finance plenty of contributions are given on the system of mortgage backed securities (MBS), as practiced in USA, about the contract saving scheme ("Bausparkassen"), as a basic housing financing model in Central Europe, little about alternative models as the Canadian mortgage insurance scheme or the Danish Mortgage Bank. But rarely any discussion is taking place on the widely unique Austrian model of housing finance, despite the fairly persuasive results, as shown below. In the paper in hand the author tries to give a brief overlook to the Austrian system of social housing finance in all its aspects. Therefore it is necessary to touch as different fields as law, finance and political economy. The complexity of the model, as a result of an ongoing process of improvement, is one of the reasons of its success. But of course it is as well a reason of the difficulty to bring the model to international discussion.