I think "going green" is definitely starting to catch on with home builders, but it really depends on how contemporary and green you are thinking of going. You want to construct a home that is not unique to the point where you have a limited amount of interested buyers, and sometimes contemporary does just that, again, depending on how "contemporary" you plan on going and mainly where you are building the home as well. If you're in a more rural setting, I can see this type of home selling okay, but put it in a neighborhood and it will be the "unique" home on the block, maybe overvalued for the neighborhood, thus not being able to find any comparable homes for it when an appraiser does his value if an offer is presented and accepted.
I only mention the last thing because nowadays with the banks being stricter on appraisals, if an appraiser can't find comparable homes, it's even harder to put a value on the home and for a bank to accept giving a buyer a loan. So I would throw caution to you when building it (if you wish to re-sell it in the future) that going green is of course a great idea, especially if you focus on functionality like glass windows to the southern exposure, but not so out there that a buyer wouldn't be able to buy it due to its unique nature.
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