According to a recent article by Kenneth R. Harney posted on latimes.com:
A new study involving an unusually large sample of homes sold in California between 2007 and early 2012 has documented that, holding all other variables constant, a green certification label on a house adds an average 9% to its selling value. Researchers also found something they dubbed the Prius effect: Buyers in areas where consumer sentiment in support of environmental conservation is relatively high — as measured by the percentage of hybrid auto registrations in local ZIP Codes — are more willing to pay premiums for green-certified houses than buyers in areas where hybrid registrations were lower.
The study found no significant correlations between local utility rates and consumers’ willingness to pay premium prices for green-labeled homes.The 9% average price premium from green-rated homes is roughly in line with studies conducted in Europe, where energy-efficiency labeling on houses is far more commonplace. Homes rated “A” under the European Union’s system commanded a 10% average premium in one study, while dwellings with poor ratings sold for substantial discounts.
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