SIRCULAR intends to create digital tools, technological solutions and non-technical services for the decarbonization of the built environment, as well as a ready-to-use methodology for assessing the circularity of a given building capable of evaluating the impact of the developed construction technologies in the demos. These features are intended to improve access to information on decarbonization for end users who are not experts in these fields, as well as to provide professionals working in the construction sector with tools capable of easily evaluating and improving the circularity of this area.