This summary report provides scientific results, lessons learned, and recommendations for driving energy efficiency in existing buildings on an urban scale. It includes program marketing lesson learned, such as: personal outreach and call to action events are critical marketing opportunities.

On Maryland's Home Performance with ENERGY STAR website, homeowners can review their contractor and experience. These customer reviews, along with contractors' accreditations and services, are published on the website as part of each contractor's information page. Users of the website can search for contractors and sort the results based on homeowner ratings and by geographical location.