What are the next steps?

Three state agencies—the Energy Commission, the Public Utilities Commission and the Air Resources Board—are crafting policies to support the energy-efficiency goals. Much of the work needed to implement the new law will be completed by the middle of next year, the agencies say.

California’s large utilities will participate in that effort. They’ll also update existing programs that provide financial assistance to low-income families for weatherproofing their homes and paying their power bills.

Officials will roll out public-education programs as well as campaigns to inform real-estate professionals about the value of energy-efficient homes.

The building code will be updated again in 2020, incorporating many more efficiency measures.