EPA’s score is based on a statistical analysis of individual buildings, not campuses of buildings (with the exception of hospitals, K-12 schools, hotels, and senior care).
If you have a campus with multiple buildings that are located close together (e.g. a office park or a college campus), it is necessary to separately meter the energy consumption for each individual building in order to get a score and to be eligible for ENERGY STAR certification. This type of metering (or sub-metering) is a more effective management strategy as it will isolate problems and target the most efficient improvement opportunities. It also results in the most accurate ENERGY STAR score, given that the scoring system is based on data from single structures.
Properties that have multiple towers connected by common concourse levels and/or hallways may present a different situation. In these types of properties, if there are common areas that truly cannot be divided or separated among the towers, then EPA will consider this to be a single structure. Examples: