It is commonly assumed that buildings certified as “green” or “energy efficient” can save energy at operational stage, especially the buildings that achieved highest certification levels using green rating tools. However, literature shows that not all highly rated buildings consume less energy at operational stage (Oates et al. 2012). The differences in the estimates of energy savings may stem from the methodological quality of the studies comparing certified buildings with other buildings, especially the choice of the comparator group and indicators of energy performance.
We aimed to locate and summarise peer-reviewed published empirical evidence for the energy efficiency of new green-rated office buildings. Additionally, we collected information on the time and resources needed to perform this rapid review.