California Proposition 37 for San Francisco Buyers: The 17% Loan and $1.56M Price Cap

Maximum program loan

17%

Of the qualifying purchase price

Buyer cash minimum

3%

From non-grant, non-borrowed funds

2026 SF price cap

$1.56M

One-unit limit × 125%

Data: California election results reported November 6, 2026; statutory terms, 2026 loan limits and San Francisco income limits checked November 7, 2026.

Proposition 37 sounds like a broad down-payment program. It is much narrower in San Francisco. The loan can cover up to 17% of the price, but the home generally must be a newly built residence sold for the first time. A typical resale condo, TIC or house does not qualify.

The election has been called for Proposition 37, although California will not certify the result until December 11. More important for a buyer today, the program is not open. CalHFA still has to set the interest rate, payment schedule, underwriting rules and launch date.

My view: put Proposition 37 on a watchlist, not into an offer plan. If a qualifying new home already fits your search, the program could become useful. I would not wait for it or choose new construction solely to chase the financing.

The quick answer

The San Francisco math is unusually clean

The law caps a qualifying purchase at 125% of the county's one-unit conforming loan limit. The 2026 FHFA limit for San Francisco is $1,249,125, so the price cap is $1,249,125 × 125% = $1,561,406.25.

At that exact cap, the pieces fit together by design: a 17% Proposition 37 second mortgage plus 3% buyer cash leaves an 80% first mortgage. That first mortgage is exactly $1,249,125, the conforming limit.

That is financing, not a discount. On a $1.5 million purchase, the second mortgage would be as much as $255,000. The buyer would owe monthly payments on both the $1.2 million first mortgage and the program loan. Until CalHFA publishes the program rate and amortization period, there is no honest way to calculate the combined payment.

The property restriction matters more than the 17% headline

Proposition 37 is meant to support the first sale of new housing. The actual measure includes detached homes, townhomes, row houses, condos and manufactured homes. It also allows the first residential sale after a nonresidential property is converted into housing.

That creates a real SF limitation. Much of the inventory buyers see is older resale housing. A Victorian condo created years ago, a resale in a newer tower, a TIC interest and an existing single-family home would not become eligible simply because the buyer is a first-time purchaser.

The distinction also makes property review part of the loan review. A buyer should get written confirmation that the specific unit is a qualifying first sale. The recurring San Francisco financing problem is that the loan has to fit the property, not just the borrower.

Income eligibility reaches higher than many buyers expect

The measure sets a household-income ceiling of 200% of area median income. San Francisco's 2026 income table lists 200% AMI at $226,900 for one person, $259,400 for two, $291,800 for three and $324,200 for four.

Those figures are useful for planning, but CalHFA still has to say exactly how household size, income documentation and timing will work for this program. The law also requires the buyer to have lived in California for at least one year and move into the home as a primary residence within 60 days.

This is different from San Francisco DALP

San Francisco's Downpayment Assistance Loan Program is a separate city program. Under its current published framework, DALP can offer a deferred-payment loan to eligible first-time buyers, with availability tied to funding and application rounds. Proposition 37 calls for a fixed-rate second mortgage with monthly payments and focuses on first-sale homes.

What still has to be decided

The Legislative Analyst's Office is direct about the open questions. CalHFA decides when and how much bond financing to issue, and the program's exact size is unknown. The measure gives CalHFA up to one year after the law takes effect to implement it.

• The interest rate and loan term.
• How the monthly payment is calculated.
• Credit, reserve and debt-to-income standards.
• How builders and properties prove first-sale eligibility.
• Whether assistance can cover eligible closing costs.
• The application process, lender network and launch date.

The state can issue up to $25 billion in revenue bonds, but that number is not a pool of grants and does not guarantee every eligible buyer a loan. Borrower payments are intended to repay the bonds and program costs.

What I would do now

1. Keep shopping based on the budget and financing available today. Do not write an offer around a program that is not open.
2. If new construction is already on your list, ask the developer whether the unit is a first sale and whether it expects to participate.
3. Have a lender model the first mortgage without Proposition 37. That shows whether the purchase works before an unknown second payment is added.
4. Keep the 3% minimum separate from closing costs, reserves and immediate work. The minimum contribution is not the total cash required.
5. Compare the program with conventional low-down-payment options and any active SF assistance round after CalHFA publishes final terms.

The useful part of Proposition 37 is leverage: it could reduce the cash needed to reach an 80% first mortgage on a qualifying home. The risk is treating leverage as affordability. The combined payment, the property and the cash left after closing still decide whether the purchase works.