The built environment, consuming almost half of the world's resources extracted every year and responsible for a massive environmental footprint, is a fundamental sector in the circular transition. The circular economy has great potential to help meet global sustainability targets and the Paris Agreement's goals in particular. Moving towards a circular built environment involves a shift in roles and business models for stakeholders active in this sector. However, barriers related to culture, regulations, market, technology and education are slowing down the transition. The private and public sector need to create a level playing field in order for circular materials, products and services to become the new normal in the built environment.