The California Energy Commission, in a unanimous vote Wednesday, approved a mandate requiring that all new housing in the state built after 2020 come with installed solar power.
The action brings California a step closer to its goal of having all new housing in the state use zero net energy. It could also add thousands of dollars to the upfront cost of a new home.
“This is an undeniably historic decision for the state and the U.S.,” said Abigail Ross Hopper, CEO of the Washington, D.C.-based…
