Berkeley, California is the first city to ban natural gas infrastructure in new low-rise buildings beginning Jan 1, 2020. This ordinance leverages the City’s authority under the California Constitution to prohibit installation of hazardous internal gas piping infrastructure when granting entitlements for new buildings, and as a result avoids California Energy Commission (CEC) regulations associated with asking permission to amend energy efficiency standard. The effect of this legislation will be that builders will be prohibited from applying for entitlements that include gas infrastructure—gas piping to heat water, space, food, etc.— except for specific building systems that have not yet been modeled for all-electric design by the CEC.