Authored by StopWaste and Arup, this primer provides an overview of a circular economy framework for the built environment at the community, neighborhood and building scales. The ideas and concepts included here are intended to stimulate local government decision-makers and staff in Alameda County and beyond to consider policies and actions in their jurisdictions. It illustrates concepts with real-world examples of sites and policies. The document is intended to initiate conversation and action among public policymakers, public agency staff and other partners.