The Circular Building Toolkit is the result of 30 years of scientific research into circular building design that began with a PhD at TU Delft. This research was then validated through design projects, Dutch innovation programs, and European projects.

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The toolkit summarizes BIM-based tools, such as Reversible BIM, as well as other digital circularity diagnostic tools and reversible building design guidelines. The circularity measurement systems and environmental impact indicators applied in the Toolkit have also been adopted by ISO 20887:2020, EU Levels, the Brussels Region, CB23, and EU projects such as Caring Nature, Regen, Digital Deconstruction, the Circular Building Converter, Buildings as Material Banks, and Horizon INUA.

 
The toolkit’s outputs are color-coded and metric and can be explored by scanning the QR codes. These codes illustrate the circularity potential and environmental impact of individual building elements.