Focusing on Colorado Springs, Colorado, as a case study, the U.S. Department of Energy's Building America research team IBACOS suggests a win-win between a builder's investment in energy efficiency and that builder's ability to sell homes. Although this research did not ultimately determine why a correlation may exist, a builder's investment in voluntary energy-efficiency programs correlated with that builder's ability to survive the Great Recession of 2007 to 2009. This report explores the relationship between energy-efficiency ratings and the market performance of several builders in Colorado Springs.

This case study addresses multifamily energy upgrade experiences by two members of the Better Buildings Residential Network—Elevate Energy and the International Center for Appropriate and Sustainable Technology (ICAST).

This multifamily showcase project profiles the significant energy efficiency improvements as well as annual energy savings of 36 percent and cost savings of more than $210,000 at the Castle Square Apartments, located in Boston's South End.

This multifamily showcase project profiles the significant energy improvements as well as annual energy savings of nearly 30 percent and cost savings of $108,500 at the Golda Meir House, Jewish Community Housing for the Elderly in Newton, MA. Some of the energy efficient measures include: high efficiency windows, wall and roof insulation, LED lighting, Energy Recovery Ventilation (ERV) system, advanced building controls to prevent air conditioning use with open windows, boiler and domestic hot water system with high-efficiency boilers and pumps, baseboard hydronic heat and thru-wall air conditioners with air source heat pumps.

This multifamily showcase project profiles the significant energy efficiency improvements as well as annual energy savings of 68 percent and cost savings of nearly $300,000 from the redevelopment of The Anne M. Lynch Homes at Old Colony in Boston, MA, which provides deeply affordable housing in extremely energy-efficient buildings.

This case study profiles the winner of the 2015 Housing Innovation Awards for DOE’s Zero Energy Ready Home built in Durango, CO by Mantell-Hecathorn Builders.