An ordinance was approved by the San Francisco Land Use and Transportation Committee on July 28, 2025, requiring buildings undergoing major renovations to convert to or remain as all-electric. This amendment to the Building Code aims to reduce greenhouse gas emissions and enhance public health and safety by phasing out natural gas use in existing buildings during significant renovation projects. Major renovations are defined as substantial upgrades to mechanical systems coupled with structural alterations, non-structural alterations covering two-thirds or more of the building's stories, or substantial additions. The ordinance prohibits the Department of Building Inspection (DBI) from issuing permits for major renovations of mixed-fuel buildings submitted after July 1, 2026, unless they result in all-electric designs. Several exceptions are included to address practical challenges and specific needs. These exceptions cover cases of physical and technical infeasibility, allowing natural gas for cooking in commercial food establishments, and temporary exemptions for non-residential-to-residential conversions until 2031. Buildings with recently replaced or upgraded major gas-fueled systems (within five years) are also exempt. Additionally, 100% affordable housing projects receive phased exemptions until 2031, acknowledging their complex financing and construction timelines. The policy is driven by findings that natural gas combustion contributes significantly to San Francisco's carbon emissions and indoor/outdoor air pollution, impacting respiratory health and increasing fire risk. The city emphasizes that all-electric designs are generally more cost-effective and safer in the long run, especially when integrated into major renovation projects. The Building Inspection Commission recommended approval with amendments, including extending the effective date for some provisions and adding an exception for voluntary seismic retrofits.