Utility commissions are seldom tasked with addressing the energy and water efficiency of buildings or the challenges building owners face when investing in efficiency. Yet, by putting thoughtful policies in place governing the provision of aggregated customer data on electricity, gas, and water use to building owners, commissions can help mitigate the building owners’ barriers to investment in greater building efficiency, while benefitting utility ratepayers. At a meeting of the National Association of Regulatory Utility Commissioners’ (NARUC) Committee on Consumer Affairs, David Farnsworth explored the concrete consumer benefits of releasing aggregated customer data to building owners, methods for protecting consumer privacy, as well as the wealth of benefits energy efficiency affords consumers and utilities. He encourages commissioners to require data aggregation of all utilities after exploring the best administrative approach for implementing such programs. This presentation is based on the paper “Driving Building Efficiency with Aggregated Customer Data.”