FROM VOLUNTARY TO CODIFIED SUSTAINABILITY: A FRAMEWORK FOR EMBEDDING GREEN BUILDING RATINGS INTO BUILDING REGULATIONS

The construction sector accounts for about 35% of global energy use and nearly 30% of CO₂ emissions, making it a critical target for climate action. Green Building Rating Systems (GBRSs) have emerged as powerful tools to promote sustainability in the built environment. However, their voluntary nature limits their transformative potential. This paper presents a literature-informed and policy-grounded framework to embed key GBRS principles, particularly energy performance criteria, into national building codes, thereby advancing low-carbon development and enhancing regulatory impact. The framework follows a four-phase methodology: (1) comparative analysis of GBRS energy metrics, (2) regulatory landscape mapping, (3) case-based validation, and (4) implementation alignment. It bridges the gap between performance-based sustainability indicators and prescriptive code structures, facilitating practical adoption by policymakers and industry stakeholders. Empirical findings suggest that GBRS-aligned standards have a significant impact on improving energy efficiency and reducing emissions in both new and existing buildings. Furthermore, the framework is modular and scalable, enabling future extension to other sustainability domains such as water conservation, materials lifecycle, and indoor environmental quality. By aligning voluntary sustainability benchmarks with enforceable regulations, this study provides a strategic pathway toward SDG 11 (Sustainable Cities and Communities), particularly in rapidly urbanizing and resource-constrained regions. The research offers a replicable model to accelerate mainstreaming sustainable practices in construction policy.