The building industry is one of the most resource-demanding and polluting industries in the world. Therefore there is a need to apply the circular economy principles within the industry enabling the transition towards a circular built environment. This transition requires the reuse of building components. However current practice shows that only components with high building quality or economic value are reused. Meanwhile, most buildings listed for demolition consist of low-quality and low economic valued building components. This is the case in post-war neighbourhoods resulting in a lot of construction and demolition waste. The paper investigates all factors that influence the value of building components in order to increase the rate of reuse. These factors are based on literature and summarized in a table of 23 factors. The post-war neighbourhood Boerhaavewijk in Haarlem serves as a case study to show how to determine the value of building components. The results show that post-war building components have value and reuse potential. The reclaimed building components are used in a primary school in the Boerhaavewijk.

This study aims to determine to what extent collective trauma played a role in the development of the new urban plan of Roombeek and how this affected the district in the last 20 years. What were the consequences of these decisions for the residents of Roombeek?

To answer the research question, theoretical research is conducted about the relation between mental health, spatial planning and post-traumatic urbanism. Furthermore, the historical context of Roombeek and Enschede is analysed. In the last chapter, the spatial plans of Roombeek and the policy decisions are researched. A comparison between policy and practice is an important aspect of this study to construct a narrative about what happened after the disaster.