Building code changes required to improve efficiency?

Björn Stigson, president of the World Business Council for Sustainable Development, comments on energy efficiency in buildings in an interview with Worldchanging:

The price of carbon will not do anything for the energy efficiency of buildings. Energy efficiency of buildings is a very important part of the efficiency improvement in society, but it's such a fragmented value chain. So the price of carbon is not going to have any real impact, for the individual ... Between the owner of the building -- residents, so on -- the lever for change for any individual actor in that value chain would be so small. So if you want to improve the energy efficiency of buildings, you have to look at the building codes and formal standards. The example of California is a good example.