This article aims to analyze the emerging green building provisions within the broader context of construction sustainability in Bangladesh.  It examines green building components by exploring different available parameters of energy efficiency. Despite Bangladesh's commitments to Sustainable Development Goals (SDGs), including resilient infrastructure and lower carbon emissions, there are policy and legal gaps regarding green building. This article investigates the prospects of regional green building rating systems. A doctrinal research approach is integrated with analysis of parliamentary enactments, cases, relevant journals and reports. The article also scrutinizes the theoretical discourse of environmental justice to rationalize green building. Findings focus on the gap between various mandatory effects of energy-efficient factors and the absence of an enforceable national green building rating system. A Comparative assessment has been developed to examine how neighboring countries introduced customized green rating systems and mandated energy efficiency. It also demonstrates relevant administrative, regional, technological and economic challenges in the implementation process. It advocates for a comprehensive revision of energy law and policies to achieve cross-sectional energy efficiency in the building sector.