Good afternoon, Mary Love:
Consumer demand for green building in Charlotte has lagged many western states and practices that were common in California in the 1990's are only recently being seen here in the last couple of years. As a Landscape Architect for over 20 years, I have specific training and education in energy conservation, lifecycle materials costs, sustainability and other matters common to the "green" industry. That said, there are very few single family residential homes that are LEED certified in NC. http://greenbuildingwire.com/LEED-certified-building-NC http://www.mlandman.com/gbuildinginfo/leedplatinum.shtml#NC
In Charlotte, the MLS recently added a HERS rating field for listings, which is a comprehensive energy efficiency measurement standard. However, of 23400+ properties currently listed, only 62 even have a HERS rating disclosed. http://goo.gl/MfuMrt
THere are strategies for finding "green" houses, but as with all home searches, it is important that you find a realtor who listens to find out what is important to you, then helps you find that and purchase it on terms that fit your finances (including an energy efficient mortgage and energy credits if applicable). If you have a full time agent with a Masters degree in Planning with Finance and over two decades of experience, working for you, you will likely do better in negotiations. I'd be pleased to provide that service. If you appreciate this answer, please give it a thumbs up, or if this was the most helpful answer, please say thanks with a best answer click.