They are being called the most environmentally friendly building codes in the U.S.
"The new code, dubbed Calgreen, will take effect next January and requires builders to install plumbing that cuts indoor water use, divert 50 percent of construction waste from landfills to recycling, use low-pollutant paints, carpets and floorings and, in nonresidential buildings, install separate water meters for different uses. It mandates the inspection of energy systems by local officials to ensure that heaters, air conditioners and other mechanical equipment in nonresidential buildings are working efficiently. And it will allow local jurisdictions, such as San Francisco, to retain their stricter existing green building standards, or adopt more stringent versions of the state code if they choose."
