In 2018, the city hosted the Global Climate Action Summit (GCAS), where more than 100 state and national governments, 70 cities and numerous large companies committed to carbon neutrality by midcentury. At GCAS, San Francisco Mayor London Breed along with 23 mayors from around the world set the agenda for the next 30 years by pledging to eliminate carbon emissions from new construction citywide (by 2030) and from all buildings citywide by 2050. In 2019, San Francisco Supervisor Raphael Mandelman followed by leading the Board of Supervisors to declare a Climate Emergency, and Mayor Breed convened a Zero Emission Building Taskforce (ZEBT) - gathering leaders from across the community to provide guidance on how best to fulfill the City’s commitments equitably and effectively. The ZEBT organized into working groups with representation from a wide range of stakeholders. One key working group, focused on new construction, brought together participants from key perspectives, including community and neighborhood advocacy groups, affordable housing developers, commercial and residential owners and developers, investors, design professionals, environmental advocates, workforce and labor representatives, and City departments. Staff provided supporting technical, legal, financial, and budgetary analysis, as well as considerations of administrative practicality.