Hey Doe
I was just wondering the same as you and you should take a look at this
"Terramor's Goal: Reduce household energy costs and related atmospheric pollution by 20% or more.
* All homes will meet California's Energy Star requirements, and exceed _title_ 24 energy usage reduction standards by at least 20%
* Most homes will feature photovoltaic cells
* An 110V outlet for charging electrical vehicles will be conveniently located at the front of every garage
* Outdoor lighting will be low voltage, fluorescent on automatic timers
* Building designs will provide natural cross-ventilation in all primary rooms.
* Homes will feature solar shade components.
Apparently, this builder builds environmental friendly homes although they aren't 100% self sustaining. Heres a _link_ to their website
http://www.laderaranch.com/work-life-balance/green-living.php