I took a seminar on Energy Star homes through the AI. Although thought-provoking, unfortunately, it offered little insight into how to go about valuing green/energy efficient features. We make adjustments based on market evidence. Because this stuff is so new in most areas of the country, there is very little market data to draw on. I would like to attend a training on how to appraise based on projected energy bill savings. There obviously is value in owning a more affordable energy efficient house, but I don't want to be the one to stick my neck out to prove it.
The Government is pushing energy efficiency. If they don't want to slow it down, they need to come up with some new accepted appraisal practices and start teaching them to appraisers.