Prop 37 Down Payment Loan: What East Bay Buyers Should Know

What is Prop 37, and would it help East Bay home buyers?

Prop 37 on the November 3, 2026 California ballot would let the California Housing Finance Agency (CalHFA) sell up to $25 billion in bonds to fund a second loan covering up to 17% of the price of a newly built home. Add a 3% down payment and you reach 20% down with no private mortgage insurance. It applies only to new construction (you must be the first purchaser), to homes under a county-based price cap of roughly $1 million to $1.5 million, and to households earning up to 200% of area median income. You repay the 17% monthly, with interest — so it solves a cash problem, not a payment problem.

By Michael Delehanty — Delehanty Group | DRE #01505346 | October 7, 2026

If you've been saving for a down payment in the East Bay and the number keeps moving away from you, Prop 37 is going to catch your eye. A state-backed loan for 17% of the price sounds like the missing piece. Before you plan around it, here's what the measure actually does — and the part the headlines skip: you pay that 17% back, every month, with interest.

I'm not telling you how to vote. I'm going to walk you through the mechanics the way I would with a buyer sitting across from me, because the answer to "would this help me?" depends on which kind of home you're buying.

How the Prop 37 loan works

According to the Legislative Analyst's Office and the Secretary of State's voter guide, here's the structure:

Funding: CalHFA could issue up to $25 billion in revenue bonds. Borrowers' monthly payments repay the bonds, and the LAO estimates no direct state or local cost.
The loan: A fixed-rate loan covering up to 17% of the purchase price, paired with a minimum 3% down payment from you.
Eligible homes: Newly built homes (or first sales of converted non-residential buildings) where you're the first purchaser. Resale homes don't qualify.
Price cap: Varies by county, roughly $1 million to $1.5 million, adjusted over time.
Income limit: Household income up to 200% of area median income, adjusted for household size.
Who can use it: California residents who will live in the home. You do not have to be a first-time buyer.
Equity: Unlike some programs, the state does not take a share of your home's appreciation.

What nobody can tell you yet is the interest rate or loan term. The measure says CalHFA must keep borrowers' costs as low as possible, but the rate won't be set until the program is built. Critics note that a second-position loan can carry a higher rate than the first mortgage.

What it looks like on an East Bay new-construction purchase

Let's run illustrative numbers. Say you're buying a new $1,000,000 home in the Tri-Valley or Central County. For context, Trumark has a San Ramon new-construction homesite listed at about $1.11 million right now.

3% down: $30,000
Prop 37 loan at 17%: $170,000
First mortgage (80%): $800,000

At a 7.0% rate — close to where 30-year rates landed after the September rate jump — the first mortgage runs about $5,320 a month in principal and interest. If the second loan came in at, say, 7.5% over 30 years, that's another $1,190 a month. Total: roughly $6,510 a month before taxes, insurance, and any HOA or Mello-Roos assessments.

Those second-loan terms are my assumption, not a published figure. The point stands regardless of the rate: Prop 37 replaces $170,000 of cash you need at closing with a payment you carry for years. That can be a real win if cash is your only barrier and your income comfortably supports the payment. It's not a win if you were already stretched on the monthly number. Programs that defer repayment until you sell or refinance work differently, and the Prop 37 loan, as written, is repaid monthly.

Who qualifies in Contra Costa — and where the homes actually are

On income, the state's 2025 Contra Costa County figures put median income for a four-person household at $159,800, so 200% would be about $319,600. Limits get updated and vary by household size, so verify the current number before you count on it.

Then comes the limitation that matters most in Walnut Creek: most of our inventory is resale. A condo downtown, a ranch in Northgate, a townhome in Rossmoor — none of those qualify. Prop 37 only helps if you're buying from a builder (or a first sale of a converted building).

Where could that happen locally? Trumark's San Ramon communities, the Bishop Ranch redevelopment (its first sales aren't expected until 2027), and the 422-unit Mitchell Townhomes in Shadelands, which has final approval but isn't built. Farther east, new-home listings in Oakley, Antioch, and Discovery Bay currently sit between roughly $670,000 and $930,000, well under the price cap.

Having spent 15 years as a contractor, I'd add one thing: new construction isn't automatically problem-free. Ask about the builder's warranty, the HOA, and Mello-Roos taxes. The measure also includes an option for builders that changes how construction-defect claims work, and that's worth reading in the official ballot analysis. Our new construction vs. resale breakdown covers the trade-offs.

How it fits with the rest of the November ballot

Prop 37 isn't the only housing item you'll see. Proposition 1 is a separate $11.25 billion state housing bond covering rental housing, veterans' mortgages, supportive housing, preservation, and down payment assistance, and the state's cost would be $500 million to $600 million a year for about 25 years. Proposition 45 would speed up environmental review for many housing projects. They are different tools aimed at different problems: Prop 37 is a financing product for a specific buyer, while the others work on supply and funding.

For a buyer in Walnut Creek, the practical read is simple. Whatever happens on November 3, you still have to qualify for a first mortgage at today's rates, and that part doesn't change. If rates are what's holding you back, our post on the September rate jump shows how lock and float-down options work. And if you're a seller wondering how a new buyer incentive could affect demand for new homes versus your resale, the honest answer is that nobody knows yet. Any effect would depend on how many eligible homes get built and priced under the cap, and that takes years, not months.

What I'd do before November 3

Don't plan a purchase around it. Even if it passes, CalHFA has to set the rate, term, and rules, and the homes have to exist. Treat any timeline as unknown.
Check your actual eligibility. New construction, under the cap, under the income limit. If you're shopping resale, Prop 37 isn't your path.
Run the monthly number, not just the down payment. Ask a lender to model a second loan at several rates.
Look at programs available today. Our guide to down payment assistance in Walnut Creek and Contra Costa covers what's live now. Proposition 1, a separate $11.25 billion housing bond, also includes down payment assistance among its uses.
Budget for closing costs — the 3% is only part of your cash need.

Sources for the figures above: the California Legislative Analyst's Office analysis of Prop 37, the Secretary of State Quick Guide to Propositions, CalMatters' and the California Budget & Policy Center's analyses, and the California Department of Housing and Community Development's 2025 income limits.

Frequently Asked Questions

Is Prop 37 only for first-time home buyers?

No. Buyers don't have to be first-time homebuyers. They do need to be California residents, meet the income limit, occupy the home, and be the first purchaser of a newly built home.

Can I use Prop 37 to buy a resale home or condo in Walnut Creek?

No. As written, it covers newly constructed homes and first sales of converted non-residential buildings. Resale homes and condos in existing buildings aren't eligible.

Do I have to pay the 17% loan back?

Yes. The loan is repaid with interest alongside your monthly mortgage payment, and that repayment is what funds the bonds. The state does not take a share of your equity.

Does Prop 37 cost California taxpayers money?

The Legislative Analyst's Office estimates no direct state or local costs, because borrowers' payments repay the bonds. Critics argue the program could still increase risk and doesn't address why homes cost so much to build.

When would Prop 37 loans be available?

That's not specified. If voters approve it, CalHFA must design and launch the program, and eligible new homes must be built and sold. Don't count on it for a purchase you're making in the next few months.

If you're trying to figure out what this means for your specific situation, I'm happy to walk you through it. Text or email me directly — (510) 697-3900 or michael@delehantyre.com — and we'll talk through the numbers.

About Michael Delehanty — Delehanty Group | DRE #01505346

Michael Delehanty is a Walnut Creek-based real estate agent with Compass, specializing in buying and selling homes across the East Bay — including Walnut Creek, Concord, Pleasant Hill, Danville, Orinda, and the surrounding communities.

Before becoming a real estate agent, Michael spent 15 years running his own contracting firm in the East Bay, working on thousands of homes and major projects across the Bay Area. That hands-on construction background gives his clients a distinct advantage: when Michael walks through a property, he sees what most agents simply can't. From structural details to renovation potential, his experience translates directly into sharper pricing, smarter negotiation, and fewer surprises at the inspection table.

Michael has been a licensed Realtor since 2005, bringing more than 20 years of experience to every transaction. He has successfully guided clients through complex situations including short sales, bank-owned properties, investment transactions, and competitive multiple-offer scenarios. Whether you are a first-time buyer, a move-up seller, or an investor, Michael brings the market knowledge and problem-solving skills to get deals done.

What sets Michael apart is his deep roots in this community. He has lived in Walnut Creek for nearly 30 years and is genuinely invested in the people here — not just the properties. He served four years as Auction Chair and Athletic Boosters President at Las Lomas High School, and has been a member of a local book club for eight years. His two daughters grew up here, attending Las Lomas before going on to the University of Washington and Cal Poly San Luis Obispo. When Michael helps you buy or sell a home in Walnut Creek or the surrounding East Bay communities, he is not just doing a transaction — he is working in the neighborhood where he has built his own life.

michael@delehantyre.com | (510) 697-3900 | michaeldelehanty.com