PORTLAND, Ore. – While fewer new homes were built in the past year in the Portland metropolitan area than in the previous year, the market share of third party certified homes increased. Twenty three percent (23%) of all newly constructed homes in the Portland metropolitan area sold between May 1, 2009 and April 30, 2010 received a third party certification. This finding is based upon data reported by the Portland area RMLS to Earth Advantage Institute.
The term “certified home” refers to homes that received an Earth Advantage, Energy Star, or LEED for Homes designation, or a combined Earth Advantage/Energy Star designation. Certification and sales information is reported by participating real estate brokers to RMLS. The Portland metropolitan area region includes Multnomah, Clackamas, Columbia, Washington and Yamhill Counties in Oregon and Clark County in Washington.
This finding continues a three year trend in which the market share of certified homes in the Portland region has increased.
Homes with a third party certification sold for more than their non-certified counterparts, both in the new home and existing home markets. New homes in the six county Portland region sold for 18% more, while existing homes with a certification sold for 23% more.
“As energy efficiency and healthier homes gain more attention, builders and homeowners increasingly place value on home certification,”
RMLS reports sales data by county. Clark County, WA was the one area in the metropolitan region where newly constructed certified homes did not sell for more. However, certified existing homes in Clark County continued the trend. As a group, existing homes with a sustainable certification in Clark County sold for an average of $278,400 versus $234,100 for homes without such a certification, or 16% more.
Please see tables for detail, at http://www.earthadvantage.org/
The Portland area RMLS first began collecting information about home certification in the spring of 2007. It is the first RMLS in the country to do so.
Earth Advantage Institute would like to thank the Portland Regional Multiple Listing Service for its assistance in compiling this information.




