The Green Deal Circular Buildings is a collaboration between government, companies and institutions to actively translate circular economy thinking into buildings. The programme focuses on minimal use and reuse of raw materials and products in the design, operation and efficient use of commercial buildings. A set of building 'circularity' indicators have been determined and recorded in a living document, called a building passport. A pilot of the scheme, involving experts and participating buildings, provided valuable data which was circulated to gather feedback and further standardise the building passport tool.