Building energy efficiency policies are an important tool in addressing energy and climate policies. There has been tremendous technical and policy activity in recent years aimed toward improving building energy performance, with a focus on getting to very low energy buildings and targeting “zero” energy or emissions buildings. A variety of governments have established

ambitious, and sometimes aspirational, policies and targets for zero energy buildings (ZEBs) to become standard or commonplace. This report, intended for energy and buildings policy-makers, provides an overview of relevant definitions covering all types of zero energy or emissions buildings, regulatory policies aimed to push those standards, implementation approaches and market progress where available, and lessons learned.