Arup has developed a circularity index for Nordic modular construction provider Adapteo to quantify the reusability and environmental impact of its building systems. The tool assesses factors including material origin, reusability potential, and end-of-life recyclability across Adapteo's modular portfolio. Adapteo operates across Scandinavia and Central Europe, providing temporary and permanent modular buildings primarily for education and healthcare sectors. The index aims to provide standardised metrics for circular economy performance in construction, though widespread industry adoption remains to be seen.