建筑循环转型指标（CTI）——行业指南

Contents ExecutiveSummary06Conclusion4801.04. Introduction08Annex5002. Thank you to the companies and organizations that contributed to this work: We developed this guide in close consultation with a broad range of stakeholders, find a full listhere. Foreword Foreword Buildings and infrastructure shape how welive, work and connect with the world aroundus. The built environment underpins economicdevelopment and societal well-being, yet itspredominantly linear model – defined by resourceextraction, energy-intensive processes and short-term design – is placing unsustainable pressure onour planet and the systems we depend on. Sustainability Reporting Directive (CSRD), extendedproducer responsibility (EPR) schemes, digitalproduct passports (DPP) and embodied carbonregulations are reshaping expectations. At thesame time, innovation in design, materials anddigital platforms is making circularity morescalable than ever. To support this transition, the World BusinessCouncil for Sustainable Development (WBCSD),working with its members and partners, hasdeveloped theCircular Transition Indicators (CTI)for Buildings. Based onCTI v4.0, this guidanceoffers practical metrics and definitions forassessing and improving circular performanceacross the building life-cycle – empoweringorganizations to reduce impact, boost efficiencyand future-proof their portfolios. The sector is at a critical inflection point. It isresponsible for nearly 40% of global carbonemissions and over a third of global resourceconsumption. Construction and demolition alonegenerate an estimated 1.4 billion metric tonsof waste annually, much of which companieslandfill or downcycle – leading to environmentaldegradation, lost material value, rising costs andgrowing systemic risk. The Circular Transition Indicators (CTI) providethe methodological foundation for performancemeasurement and management within theGlobalCircularity Protocolfor Business led by WBCSD andOne Planet Network (hosted by UNEP) —a unifiedglobal framework for setting targets, measuringoutcomes, and reporting progress on resourceefficiency and circularity. The circular economy offers a powerful response.Circular strategies – such as designing forlongevity and adaptability, enabling reuse andrefurbishment, and leveraging digital tools likematerial passports – can significantly reduceembodied carbon while unlocking economicopportunity. Evidence suggests circularconstruction can cut emissions by up to 38%while reducing dependency on virgin materialsand increasing operational efficiency. Importantly,circularity also strengthens business resilience,supports regulatory readiness and creates long-term competitive advantage in an increasinglyresource- and carbon-constrained world. We invite all stakeholders to adopt CTI as theshared language for circular action. Together, wecan create a built environment that is not only low-carbon and resource-efficient, but regenerative,inclusive and economically resilient. Market dynamics are accelerating this shift.Regulatory frameworks such as the Corporate Diane Holdorf Executive Vice-PresidentWorld Business Council for Sustainable Development (WBCSD) Quentin Drewell Senior Director, Circular Products and MaterialsWorld Business Council for Sustainable Development (WBCSD) Néstor Rouyet RuizGlobal Sustainability Technical Director - Carbon & CircularityArcadis Stuart SmithDirector & Global Circular Economy Skills LeaderARUP Executive summary 01. 01. Executive Summary The built environment is one of the largestcontributors to global environmental challenges.It is responsible for nearly 40% of global CO2emissions, with material extraction, productionand disposal driving resource depletion at anunsustainable rate. Buildings account for 50%of global material use, yet only 10% of materialsre-enter the economy after demolition. The sectorfollows a linear model, leading to excessive wasteand inefficiencies. At the same time, regulatorypressures, investor expectations and marketdemand for sustainable and circular businessmodels are accelerating. Stricter environmental,social and governance (ESG) regulations andincreasing demand for transparent sustainabilityreporting require companies to demonstratecircularity efforts. →Construction:Optimizing material use,construction waste and emissions reductions. →Operation:Achieving extended lifespan andenergy efficiency. →Retrofitting:Enhancing durability, minimizingenvironmental impact, preserving the building’svalue and ensuring compliance with newregulations. →Deconstruction:Enabling closed loops byensuring efficient material recovery and re-integration and the minimization of waste andgreenhouse gas (GHG) emissions. Adopting a life-cycle-based methodology formeasuring and managing circular performance,such as the CTI for Buildings, will help companiesset circularity roadmaps and measurable targets,track progress on sustainability goals and enhanceregulatory compliance. This will ensure alignmentw