Unbuilt landscape is a limited resource. Given the demographic developments in many European countries such as future population decline and an ageing society, the economic aspect of land utilization is growing in significance.
While, as a rule, reuse of brownfields and gaps between structures allows existing infrastructures to be exploited, permitting building on new land usually entails enhancing or installing new technological infrastructures (e.g. adequate traffic accessibility, utilities and waste management facilities) and social infrastructure (e.g. childcare and educational facilities). At the same time, infrastructure capacities and the long-term financial scope for providing requisite infrastructures significantly determine the quality and cost-effectiveness of residential, commercial and industrial sites. Furthermore, the costs of site maintenance also have to be considered.