Due to the political, social and economic structural changes of the 90s in various European cities many former industrial or commercially-used areas were abandoned. The negative impact of these areas on the quality of urban life reaches far beyond the site itself. The conversion process of former commercially-used brownfields located in inner-city districts shows that projects of investors are often at odds with the ideas of municipal authorities on sustainable inner urban development. These conflicting interests create a deadlock caused by the existing administrative tools. PROSIDE improves urban development and ensures that natural areas are preserved and run-down areas restored. Quality of life and environmental quality in inner cities will be clearly enhanced by private investors. The project's communication tools are a contribution to the CADSES information society, providing a database for private investors and promoting communication among all municipal departments as well as a better involvement of European society and the relevant socio-economic units early in the development process. The planning tools bring together the objectives of implementing a more balanced social and economic development of inner urban areas, and reducing environmental damage. Furthermore the PROSIDE approach reduces the time frame for future investor-driven planning activities and increases the success rate of privately funded rehabilitation projects. The co-operation of different cities with various spatial conditions in the CADSES area improves the horizontal exchange of experiences in spatial and environmental planning. The co-operation of university institutions with public administration bodies and private companies enhances the direct information flow and know-how transfer between basic research and practical applications. Achievements: Overall objective of PROSIDE was to ensure that the plans of private investors are in line with municipal needs for sustainable urban development within a short and adequate time frame while enhancing the rehabilitation of industrial sites and areas with private funds. In Stuttgart, Milan and Budapest the PROSIDE methodology of a test planning has been implemented. Planning teams established step-by-step developments for the PROSIDE areas, while keeping the activities of the surrounding areas in mind. Experts in the other working groups analysed the environmental situations, the demands and wishes of private investors, and the administrative structures within the municipalities involved in a revitalisation process. All these findings were brought together and compiled in one recommendation per partner city. They were then handed over to the respective municipal and political stakeholders. In the final project phase these recommendations at local level were transformed into tools which are now applicable in the whole of the CADSES area. The tools and recommendations are available as downloads from the homepage.