The developer will start measuring the percentage of reused materials on jobs from next April using its newly developed ‘Circularity Score’.

The target will then rise to 50% for jobs starting after 1 April 2030 and 60% circularity on all new schemes by 2040.

GPE has been pioneering circularity on schemes like 30 Duke Street, St. James’s where 1,700 tonnes of steel from a deconstructed building in the City of London have been reused.

The developer will be holding circularity focus groups with its supply chain to find ways to catalyse the circular economy and materials reuse.

Toby Courtauld, Chief Executive, said: “Our new Circularity Score will challenge us to innovate further and faster than ever before as well as stimulating the growth of a deeper and better functioning market for reused materials.

“We also expect that our actions will encourage a more valuable and nuanced debate on what constitutes truly sustainable development rather than the currently polarised discussion around retrofit versus new build.”

Janine Cole, Sustainability & Social Impact Director, said: “This is just the first stage of the process. We will regularly revisit our Circularity Score and intend to develop reuse targets for specific building components with the assistance of our supply chain circularity focus groups.

“We will use these secondary targets to reduce reliance on recycled content to achieve our targets. Further, we will publicly disclose our building scores for our onsite developments and methodology as part of our reporting obligations in May 2025.

“We firmly believe that measurement supports improved management and that early action to stimulate innovation in our marketplace is essential. We expect, as with embodied carbon, that consensus will emerge on the measurement of circularity and look forward to continued collaboration with the wider industry as we learn and progress.”