Hence, a non-existent database with the most important bench- marks of the various building types is necessary to define the exact saving potential of the whole Luxembourg building sector. So, the aim and most important research activity were to collect energy values of buildings in order to compile a representative database and make a statistical evaluation. This paper presents the results of the benchmark study for newer schools in Luxembourg and illus- trates that, contrary to common expectations, the primary energy consumption of new buildings has increased in recent years as a result of the increased electricity consumption.