I spend lots of time in the green building world. In my role as Executive Director at the Institute for Building Systems I talk to all kinds of people in the field and see it myself day to day. Existing regulations and inertia are as big a barrier as price.

Check out the article I just had published in Sustainable Living Magazine.

http://www.sustainablelivingmagazine.org/business/eco-business/108-builders-and-renovators-face-barriers-in-the-shfit-to-sustainability