According to Fortune, San Francisco will soon become one of the first big cities in the nation to mandate solar power for new buildings. The new legislation is expected to go into effect in January.
The mandate calls for all new buildings up to 10 stories tall, both residential and commercial, to use either solar panels for electricity or a solar system to heat water.
San Francisco’s new mandate builds on a prior city law that says 15% of the rooftop space on all new small and medium-sized buildings needs to be “solar-ready” (unshaded and unobstructed). The new rule now says those solar-ready spaces will need to have solar installed.
San Francisco has a goal of meeting 100% of its electricity needs with clean energy by 2025, and it looks like this is going to be an important step towards that goal. We’ll have to see how it goes.