APEC economies continue to engage positively in the development and implementation of building energy codes as a key policy strategy for achieving energy savings and reducing greenhouse gas emissions. This discussion paper draws from recently published research on building codes activity globally and in APEC economies, and new interviews conducted with policymakers in eight participating APEC economies (Australia; China; Indonesia; Malaysia, The Philippines; Thailand; Singapore; and Viet Nam) in the Asia-Pacific to provide a summary of best practices in building energy codes, a landscape analysis of building energy codes in the Asia-Pacific and an analysis of common issues and opportunities for collaboration among APEC economies.