A disconnect currently exists between the energy efficiency program implementers, the real estate community, and the homebuyer and seller. Energy efficiency programs have not found ways to transmit consistent, standardized data about energy efficiency features in existing homes to the real estate industry so that these features can be taken into account by buyers, appraisers lenders, and others during the home sales transaction. This white paper, developed by the National Home Performance Council and CNT Energy, provide energy efficiency program sponsrs and other stakeholders in the home performance industry with methods to document efficiency improvements and incorporate them into the real estate value chain.