2026 Ballot Initiative
The SF Affordable Housing Guarantee Act
The San Francisco Affordable Housing Guarantee Act would lock in funding and protections so San Franciscans are not left hoping politicians do the right thing—it would be the law.
Get involvedWhat the Guarantee Act does
Strengthen Prop I
Dedicates Prop I revenue to affordable housing, so funding does not depend on political discretion—it is required by law.
What's Prop I?
Creates Social Housing
Deeply affordable homes that are community-owned and available to a wider mix of incomes than traditional public housing.
What's Social Housing?
Tenant Protections
Funds tenant protections including legal assistance—critical as evictions skyrocket to record levels across our city.
Skyrocketing Evictions?
What is Prop I?
In November 2020, San Francisco voters approved Proposition I: a transfer tax on ultra luxury real estate deals worth over $10 million, like mega-mansions and skyscrapers. It passed alongside a unanimous Board of Supervisors resolution that called for the revenue to be spent on affordable and social housing programs.
Prop I has raised over $500 million since then—but without a binding mandate, that money has not always stayed dedicated to housing. The Affordable Housing Guarantee Act would legally require Prop I revenue to fund affordable housing production and preservation, social housing, and tenant stability programs.
San Franciscans for Social Housing led a 2025 petition that gathered over 1,000 signatures to raise awareness that Prop I revenues were being diverted to other programs.
Take action
Get involved
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Built by a growing housing coalition
The Guarantee Act is authored by housing activists, including traditional affordable housing developers and social housing advocates. Our coalition is expanding; if you represent an organization that would like to endorse the Act or participate in coalition with other housing advocate groups, please visit our contact page or sign up above.