The contribution intends to present the importance of green spaces in the urban structure, their meaning for ecological and social quality in the city and their importance for the economic value of properties. It gives an overview on the originating of brownfields - urban waste land and the chance and opportunity to use them for improvement of urban districts. Two specific aspects were regarded more detailed, the importance of the integration of the inhabitants in the reuse process and the meaning of green spaces for the land value. By presenting examples of different German cities, the authors specify these aspects and point out the importance to include those in the urban planning process. The combination of social activities and economic factors occupies an important role in the sustainable urban planning process and how to consider them can be an advice for other cities.
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