Interested in finding a green home builder? There is no definitive directory of builders, but there are some good regional lists. Building Concerns is one of the more comprehensive directories, with an emphasis on California, but also covering Florida & Georgia and the Mountain States. Building Concerns lists green architects, contractors, consultants and similar professions. Sustainable Sources Directory by GreenBuilder.Com is nation-wide in scope but there a fewer listings. The Northwest EcoBuilding Guild has a good directory of green building services in that part of the country. There are many other localized directories of green builders, you may want to search on "green builder" or "green architect" and your city name.