Real estate appraisers have historically faced challenges with green and energy efficient homes, both in identifying comparables and in supporting adjustments for improvements. These difficulties stem

from many reasons, including data gaps in commonly used information systems and lender guidelines that look skeptically upon the use of income or cost approaches to value. The housing industry
believes this makes it more difficult to build green and energy-efficient homes.

Thanks to efforts from U.S. Department of Energy team, Building America Research Alliance, the Appraisal Institute now has agreements in place with several home certification organizations to use rater information to auto-generate a Green and Energy Efficiency Addendum to the appraisal that could help more accurately value energy-efficiency improvements for thousands of homes on the market. RESNET raters evaluated 120,000 homes in 2013 and are expected to rate more than 200,000 homes in 2014.