While on the one hand new trade and residential areas are planned on the 'green meadow' (a kind of area resources entropy), the share of unused traffic, trade, and industry areas is increasing. A solution concept to the reduction of the land consumption and protection of essential area resources is a consistent recycling of derelict land (also called brownfield redevelopment). „Land“ as a resource will be conserved and the land consumption reduced, already existing infrastructure can be re-used.
In practice brownfield redevelopment is still unstructured, concerning individual, not transferable cases, and handicapped by numerous hindrances, which represent cost and liability risks for the investor. Brownfield redevelopment is synonymous for a whole row of working steps. These begin with the preparation of the construction site of a property and end up with the successful marketing and changed use. It touches upon a number of different subjects and legal aspects and is a new interdisciplinary challenge, for the practice and science (as well as for teaching and training). It is important to design instruments for the re-use of sites in a quick and practical way, so the cooperation of a multitude of professional disciplines is demanded: architecture, planning, engineering, sciences, law, insurances, financing.