What Is San Francisco Prop. I?
San Francisco Proposition I was a voter-approved 2020 ballot measure that sharply increased the city’s real estate transfer tax on property sales of $10 million or more.
Approved on November 3, 2020, it targeted high-value commercial and residential deals rather than ordinary home sales.
It was structured as a progressive tax aimed at luxury transfers, including transactions involving corporations and real estate trusts.
The measure was expected to raise an estimated average of $196 million annually in new revenue.
Higher Rates, Narrower Reach
Sales from $10 million to $24.99 million were taxed at 5.5%, up from 2.75%.
Sales of $25 million or more were taxed at 6%, up from 3%.
This focus on top-tier transactions echoed pressures seen in the luxury market, where high-end property activity has remained notably strong.
Revenue went to San Francisco’s General Fund. The measure did not directly dedicate money to housing.
Exemptions
City purchases were exempt.
Nonprofit exemptions included a reduced 0.75% rate on sales to nonprofit organizations, regardless of value.
How Prop. I Would Cut Transfer Taxes
Proposition I’s rollback would slash transfer tax rates on the city’s largest real estate deals. It would cut the levy on $10 million to under $25 million transactions from 5.5% to 2.75%.
For deals of $25 million or more, the tax rate would fall from 6% to 3%.
The proposal would restore the pre-2020 rates that existed before San Francisco voters approved the higher Prop. I brackets. Those brackets apply to major real estate transfers, including sales and leases of 35 years or more.
The lower rates would affect large commercial, multifamily, and other non-single-residence transactions. Lower-value transfers would remain untouched.
Single-family residences would remain exempt from the rollback reductions described for 2026.
Supporters say the change would improve market liquidity and investor incentives. They argue it would reduce costs on large transfers and development-related transactions.
Backers also point to market liquidity pressures in major urban real estate markets as a reason to lower transaction costs on large deals.
Why Housing Groups Oppose Prop. I
Housing advocates are resisting Prop. I because they argue lower transfer-tax rates on property sales above $10 million would drain money from affordable housing during a severe budget strain.
Groups backing a rival measure want that revenue protected for housing rather than redirected to general city use.
They propose at least 60% for new construction and 25% for acquiring and preserving buildings.
Another 10% would go to tenant-stabilization and homelessness-prevention work.
Organizations including the San Francisco Community Land Trust say keeping current tax rates supports citywide housing production and preservation.
They describe the dispute as a fight over control of revenue from large real-estate transactions.
Critics contend rate cuts would mainly benefit developers, speculators, and wealthy sellers.
They also warn the change would undermine community outreach, tenant education, and long-term housing equity goals citywide.
What Property Tax Appeals Say About SF
Soaring property-tax appeals are signaling deep market stress across San Francisco’s commercial real estate sector.
The Assessment Appeals Board received 6,836 reduction applications in the 2023–24 cycle, up from 1,878 a year earlier.
That jump, alongside reports of roughly 9,000 appeals this fiscal year, points to a broad valuation reset rather than isolated disputes.
Key signals
1. Office decline remains central, with vacant buildings and weak demand pushing owners to challenge assessments.
2. Appealed value gaps are striking, with properties assessed near $90 billion but owners arguing for about $43 billion.
3. Revenue impact is substantial, as lower values could reduce property-tax collections by about $200 million by 2027–28.
Together, the filings suggest many owners believe city assessments still exceed current market reality in office-heavy districts.
What the November Vote Could Change
November’s ballot could reset one of San Francisco’s most expensive real estate costs by cutting transfer-tax rates on large property sales back to their pre-2020 levels.
The BUILD Act would reduce the tax on deals from $10 million to $25 million to 2.75% from 5.5%.
For transactions above $25 million, the rate would drop to 3% from 6%.
Single-family homes and properties below $10 million would see no change.
Supporters present the measure as a tool for development incentives tied to stalled housing and commercial projects.
Lower closing costs could ease financing barriers, improve land sales, and help underperforming assets change hands.
The finance impacts are less certain.
San Francisco relies heavily on transfer-tax revenue from expensive deals, so voters would be weighing lower collections against possible gains in project activity.
Assessment
San Francisco’s transfer tax fight has narrowed, but the stakes remain high.
The debate over Prop. I reflects deeper strain in the city’s real estate market, where falling values, tax appeals, and weak office demand continue to pressure public finances.
Housing groups warn the measure could reduce revenue for critical services and affordable housing efforts.
The November vote now stands as a consequential test of how San Francisco balances market distress against fiscal stability and housing needs.
