Benchmarking, tracking building-level energy use over time, is a useful way to manage building costs and to enable energy efficient improvements. However, because large commercial buildings typically have multiple tenants whose energy usage is metered separately, tracking overall building energy use is difficult. To facilitate this, building owners and third parties need access to customer energy use data that are aggregated across all the meters in the building. This paper explores how a growing number of jurisdictions have implemented statutes, rules, or benchmarking requirements requiring utilities to provide building owners and third parties with these data in aggregated form. Such policies can spur greater energy savings and market transformation across the building sector, and they can do so in a way that will ensure privacy and security protection of ratepayers.