On November 19, 2024, the Board of Supervisors adopted an ordinance implementing an energy performance Reach Code for new construction in unincorporated San Mateo County. The ordinance has not yet taken effect, but applicants should read below for more information.
Background
In 2023, the County adopted local amendments to the California Green Building Standards Code designed to shift toward an all-electric future, and away from reliance on methane gas. These local amendments, commonly referred to as “Reach Codes,” can help lower costs, reduce indoor and outdoor air pollution, eliminate the risk of carbon monoxide poisoning from gas appliances, and reduce greenhouse gas emissions. Through electrification, the community can transition from burning methane gas and other fossil fuels to power provided by clean, carbon-free sources of electricity such as solar and wind. As a result, residents, businesses—the entire community—benefit.
Due to recent legal developments, in early 2024 the County temporarily paused enforcement of the portions of its Reach Code that required new buildings to be all-electric (San Mateo County Building Regulations Sections 9218 (Section 4.106.5) and 9219 (Section 5.106.13).
Subsequently, the Board of Supervisors adopted an ordinance repealing the all-electric portions of the Reach Code, and adopted new local amendments to the Energy Code to require higher energy efficiency targets. This new ordinance will be enforced after approval by the California Energy Commission, which is expected in 2025.
The County strongly encourages applicants to eliminate methane gas in new construction to achieve the benefits of reduced emissions and cleaner air. The State is moving toward an all-electric future and the County would like to continue to be a leader in taking climate change action.