The growing land usage in Austria goes hand in hand with the scarcity of the ressource land and requires next to steps, relating to the regional planning policy, also the use of the instrument brownfield development, which this thesis is about. Next to the importance of the ressource land, the ecological and economical consequences of land usage are presented, what again points out the urgency of acting against it. The definition of the terms "brownfields" and "brownfield development" is followed by a typification of brownfields and a selection of reasons for land being left fallow. Moreover the origin and progress of brownfield development, which can be found in the industrial regions of Great Britain and Germany, will be illustrated. Constraints and cons like contaminations, as well as chances and advantages of brownfield redevelopment, like the contribution to reduction of land usage and prevention of a further urban sprawl will be pointed out. Some examples of specific actions that can be taken in brownfield development will be pointed out in a further subchapter. The description of accordant strategies and measures, eventually leads from the European level to the Styrian capital city of Graz. After explaining the basic conditions, it will be demonstrated, if and what measures are taken in Graz. It was noticed that according to official sources there are no specific instruments like brownfield statistics, as they are not considered necessary by the city of Graz. On the basis of a documentation of selected case studies, it will be analysed how brownfield development is put into action in Graz, especially by private companies. The illustration of the specific objects' development by means of pictures taken, as well as images from the internet and from various books, is very important for this documentation.