This annual report captures the key achievements of the Asia Low Carbon Buildings Transition (ALCBT) Project in 2025, outlining how the initiative is accelerating the shift toward low-carbon buildings across Cambodia, India, Indonesia, and Thailand. It highlights progress in developing and deploying regional tools such as the Building Emission Assessment Tool (BEAT) and ASEAN BUILT, advancing policy and financing frameworks, conducting subnational building assessments, and delivering targeted capacity-building and knowledge-sharing activities.