A future with net zero emissions requires scaling up improvements in energy efficiency, electrification of end uses and renewable energy generation. For the Association of Southeast Asian Nations (ASEAN), a growing population and rising standards of living will massively increase future energy demand. Mitigating growing electricity demand and integrating renewable energy into electricity generation will therefore be paramount for the region’s clean energy transition and avoid lock-in of additional fossil fuel generation. The intermittent nature of variable renewable energy and increasing deployment of distributed energy resources are putting additional pressure on existing grids. In response to these challenges, this report explores the opportunities and challenges for efficient grid-interactive buildings in the ASEAN region.