A new econometric study involving an unusually large sample of 1.6 million homes sold in California between 207 and early 2012 has documented that, holding all other variables constant, a green certification label on a house adds an average 9 percent to its selling value. The research was conducted by professors Matthew E. Kahn and Nils Kok of Maastricht University in the Netherlands, a visiting scholar at the University of California, Berkeley.
Heating and air conditioning in the typical home are the largest energy users. Efficient furnaces and / or heat pumps, in combination with properly sealed duct work, represent significant energy saving opportunity in Seattle’s climate. Upgraded insulation and efficient water heaters can also take a bit bite out of energy use.
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