Circular Economy for Climate-Resilient and Sustainable Construction

This study develops an integrated framework for applying Circular Economy (CE) strategies in climate-resilient construction, drawing on empirical evidence from four international case studies: the Netherlands, United Kingdom, Japan, and Australia. Through Lifecycle Assessment (LCA), Material Flow Analysis (MFA), and Net Present Value (NPV) modeling, the research quantifies CE performance across planning, design, execution, and post-use phases. Key findings show that CE practices—such as modular construction, selective demolition, recycled aggregate use, and geopolymer concrete substitution—achieved carbon reductions of 20–40%, material recovery rates of 45–80%, and lifecycle cost savings between €500,000 and €1.2 million. Additionally, CE-aligned interventions enhanced climate resilience, evidenced by a 25% reduction in flood risk and a 20% increase in infrastructure lifespan. Results indicate that governance capacity, digital tool deployment, and material recovery infrastructure are critical enablers of CE performance. The proposed framework offers a replicable, lifecycle-based approach for aligning environmental and economic goals, enabling construction systems to simultaneously decarbonize and adapt to escalating climate pressures.