Reinvestment in existing housing stock and urban environments is a necessity to maintain housing and neighbourhood quality and to ensure resource efficiency. Understanding reinvestment processes and households’ reinvestment decisions is a crucial issue for urban decision makers and planners. In this context, the main objective of this course is to discuss why reinvestment processes and policies in existing housing stock and neighbourhoods are essential. The course also aims to provide students with an understanding of macro implications of households’ reinvestment behaviour and existing policy approaches to reinvestment processes.