Do green-rated office buildings save operational energy?

A rapid review on green-rated office buildings, and their operational energy use, found that the conclusions of six studies ranged from the certified buildings performing worse, similarly or much better than the non-certified buildings in terms of energy usage intensity. Two papers noted the high variation in performance among the included certified buildings, and weak or no relationship with the certification level or number of energy credits. One study found 20% better performance in a subset of gold-certified buildings.