The Ruhr is one of the most densely populated areas of Europe. The region can point to flourishing cities, quality higher education institutes and employers that attract more people than they lose. It also has the challenges of structural shift and an ageing population – factors that influence housing needs and the construction of urban districts and individual properties. This in turn provides an economic stimulus: increasingly, it is not only existing and planned new buildings that need to comply with the demands of a sustainable future; entire city districts and regions are planned and implemented with economic and environmental efficiency in mind.