The dissertation thesis "Possibilities of city development on brownfield sites" focuses on application of sustainability tools in abandoned places of the city. It aims to evaluate the scale of real applicability of these tools into planning policy, settlement development, adaptation of urban environment, all in a theoretical level. It also aims to make the options for an integration of the selected - highlighted elements of current urban trends visible; to support the spirit of ecology, humanization, sustainability and aesthetics, the spirit of a place. Historical, socio-political, geographic consequences of the given state of country, especially of settlements, is set in the introduction, in the way that today´s productive and creative generation receives it from its ancestors. The terms interdepartmental, complicated are what is found in each one referred source of information with the word "brownfield" (and alike) . The position of the topic is localized in the coordinates of time development, geographic position, professional analysis and social life of the citizens. The question of inner city areas recycling, its effective way of exploitation and re-living is put into the thesis core; followed by the sub-questions of possible application methods. As far as the research is rather analytical than experimental, it looks at the features of selected locations with similarities in its own way; the similarities are: production, mainly of industrial character, inner city position (centre - inner city), long period of dysfunction. The research methodology explains a simple look at the thing, which is complicated by the typical unclear words with little exact limits. The dissertation thesis takes further similar researches - mostly of theoretical-philosophical character; however it develops next options to carry on the research, next branches touching the spatial planning, urban development, urban design for public spaces, urban typology, in the conclusion and discussion. The thesis sketches up some supportive documents, databases and researches.