This brief summarizes the lessons learned across Europe on the redevelopment of contaminated sites as a part of urban planning and renewal. Specifically, it aims to provide information on the health and environmental impacts to be considered during site redevelopment projects, and to identify good practice and relevant local experiences to support effective, healthy and sustainable redevelopment of contaminated sites. As such, this brief offers key messages to support the work of local decision-makers, planners, practitioners, researchers and civil society organizations.