Energy-efficient windows

Window film is applied to a dining room window in Los Angeles. The film will cut down on the heat from outside so less energy is needed to cool the house. (Anne Cusack / Los Angeles Times)

Home energy efficiency and sustainability have been major policy priorities for the Obama administration, but lurking in the background are two consistent questions: Beyond the documentable savings on utility bills, do such steps add to the resale value of a home? And do they make it easier or faster to sell your property?

Housing groups and housing officials say that definitive statistical data covering multiple regions of the country are scarce. But some localized research projects in Oregon, Washington and California offer promising hints.

In a study covering existing and new houses sold from May 2010 through April of this year, the Earth Advantage Institute, a nonprofit group based in Portland, Ore., found that newly constructed homes with third-party certifications for sustainability and energy efficiency sold for 8% more on average than noncertified homes in the six-county Portland metropolitan area. Existing houses with certifications sold for 30% more.