A major player in the circular economy wanted to make a circular statement for its industrial building, true to its own mission. His circular ambitions were mapped out and refined in the process; With respect for the starting points of the sketch design of the architects, it was investigated where there were circular opportunities; the focus shifted to minimizing the amount of materials, using materials with recycled content, and the demountable nature of the constituent building components. The exercise also revealed in which part of the complex the most reductions could be achieved. A book of materials and assembly techniques was one of the outputs of the process; circular variants were imposed in the tender and circular options were allowed; the building will be completed in 2024.