This document addresses the International Living Future Institute’s (ILFI) Zero Energy (ZE) certification and the Passive House certification of the Passive House Institute (PHI). ILFI and PHI consider these certification programs to be highly complementary. The energy efficiency requirements of Passive House provide a targeted pathway focused on high energy efficiency for pursuing Zero Energy. The 12-month performance requirements of Zero Energy certification, in turn, provide a mechanism to validate the outcome of anticipated energy savings from Passive House.