San Diego County: How to Get Ready for Prop 37's New-Home Down Payment Loan (and What to Do While You Wait) — November 2026

On November 3, California voters approved Proposition 37, a new state loan that can cover up to 17% of the price of a newly built home when the buyer brings at least 3% of their own money. In San Diego County, that could mean a second loan of up to $234,600 on a new home priced at the county's cap of $1,380,000, for households earning up to about $261,800 (family of four). The catch: there is no application yet, no interest rate and no lender list, and the California Housing Finance Agency (CalHFA) has until roughly December 2027 to launch it. This guide explains exactly what the measure says, who and which San Diego homes would qualify, how to run the payment math at today's rates, and the steps to take now so you are ready, without pausing a good purchase you could make today.

Here is what is in the news:

• Prop 37 passed. KQED reported on election night that Proposition 37 passed, according to an Associated Press projection, with nearly 61% of the vote in early returns. The results are unofficial until the Secretary of State certifies them (deadline December 11, 2026); the measure then takes effect five days after the results are filed. KQED's own caution is worth repeating: before anyone can apply, CalHFA has to build the program, and the homes have to be built.
• What it creates. The Legislative Analyst's Office (LAO) describes a "middle-class homeownership loan" funded by up to $25 billion in CalHFA revenue bonds. Each loan covers up to 17% of the home price, the buyer puts in at least 3%, and borrowers' monthly payments repay the bonds, so the LAO estimates no direct state or local costs.
• No application exists yet. As of November 7, 2026, CalHFA had posted no Prop 37 application, program page, rate or lender list, according to a tracker that checked the enacted text. Any website "taking Prop 37 applications" before CalHFA announces the program is not the program.
• San Diego reaction. CBS 8 talked with San Diego real estate professionals on election week. One stressed that the 17% "is not free money, it's gonna have to be paid back," and that bringing 3% plus the 17% would mean no private mortgage insurance (PMI) for most buyers, which he said can add $300 to $600 a month. Another urged buyers to check their credit now, noting that most down payment assistance programs need a score of at least 640.
• Rates eased for a third week. Freddie Mac's Primary Mortgage Market Survey put the 30-year fixed at 7.18% for the week of November 5, 2026, down from 7.24% a week earlier but well above 6.22% a year ago. That is the latest weekly print (the next is due Thursday, November 12).
• Builders are already discounting. Lennar's San Diego promotion page (checked November 9) advertised a 4.875% promotional rate (5.628% APR) versus a 6.890% market rate on a sample $669,900 home, for contracts signed November 2-9 that close by November 30, with Lennar Mortgage financing required. Its listed new homes ranged from $599,900 (Chula Vista and El Cajon) to more than $1.8 million (Oceanside). Builder incentives like this exist today; Prop 37 money does not.

What Prop 37 actually says (in plain English)

All of the rules below come from the measure's legal text, which adds Chapter 11.5 (starting at Section 51515) to the Health and Safety Code.

Who can borrow (Section 51515.01(a)). You must meet all four tests:

1. California resident for at least one year before you apply.
2. Owner-occupant: you must move into the home as your primary residence within 60 days of closing. Investors and second homes do not qualify.
3. Income at or below 200% of area median income for your family size, in the county or metro area where the home is.
4. At least 3% down "from a source other than a grant or borrowed money." Down payment assistance loans and grants cannot supply your 3%. CalHFA has not said how it will treat family gifts.

You do not have to be a first-time buyer. The measure requires you to be the home's first purchaser, which is a rule about the home, not about you. A current or former owner can qualify if they meet the other tests (CalHFA can add rules, and it sets how long you must live in the home).

Which homes count (Section 51515.01(b)). A newly built house, townhome, row house, condominium or manufactured home where you are the first buyer, or a condo or other unit in a building that was nonresidential (such as an office building) and was converted to housing, again where you are the first buyer. Resale homes do not qualify at any price.

Price cap. The sale price cannot exceed 125% of the FHFA one-unit conforming loan limit for the county. San Diego County's 2026 limit is $1,104,000, so the cap is $1,380,000. FHFA had not announced 2027 limits as of early November (they usually come in late November), and the cap will move with them.

How the loan works (Sections 51515.04 and 51515.05).

• It is a second mortgage, behind your main loan, for no more than 17% of the price. That is a ceiling, not a promise. CalHFA may let part of it pay closing costs.
• Fixed rate, no prepayment penalty. CalHFA sets the rate, term and principal repayment at levels "practical and favorable" to borrowers but enough to repay the bonds and cover costs.
• Fees are capped: the lender's origination fee is no more than 0.5% of the loan or $290, whichever is greater, and no other lender fees unless CalHFA allows them.
• Credit flexibility: if your score falls short, the lender must let you submit bank statements, pay stubs, assets and rent history for "cash flow underwriting."
• You must have your own licensed California agent or broker. The measure requires every applicant to retain a licensed California real estate agent or broker of their choosing.
• Hardship deferral: you can ask to temporarily defer interest payments under CalHFA's criteria.
• Underwriting (minimum credit scores and debt-to-income limits) will follow Fannie Mae, Freddie Mac or FHA standards.
• Timeline: CalHFA must implement the program no later than one year after the effective date.

San Diego County's Prop 37 numbers

Estimated income ceilings by household size (200% of 2026 San Diego AMI): 1 person $183,300; 2 people $209,400; 3 people $235,600; 4 people $261,800; 5 people $282,700; 6 people $303,700. These are estimates from the state's 2026 median-income figures; CalHFA will publish the official table and may adjust for family size differently.

One detail stands out for San Diego: at the $1,380,000 cap, an 80% first mortgage is $1,104,000, exactly the county's 2026 conforming limit. That means a Prop 37 buyer at the cap could still use a conforming first loan rather than a jumbo, at least under 2026 limits.

The San Diego market the program would land in (October 2026, Realtor.com)

Source: Realtor.com Residential Data, county inventory core metrics, October 2026 (FIPS 06073; quality_flag 0), re-downloaded November 9, 2026. The price-cut share is Realtor.com's own price_reduced_share field (0.2051), not price_reduced_count ÷ active listings. These figures cover all listings, new and resale.

The Pacific Southwest Association of REALTORS® (PSAR) puts the countywide median sale price for the 12 months ending October 2026 at $1,050,000 for detached homes and $650,000 for condos and townhomes. In other words, much of the county's detached resale market already sits below the Prop 37 cap, but the program will only apply to the much smaller slice of homes that are newly built or newly converted.

Where new homes are being built: ZIPs with active new-home communities. The table below shows October listing data (new and resale combined) for ZIPs where builders are actively selling, so you can compare a builder's base price against the neighborhood's asking prices.

Source: Realtor.com Residential Data, ZIP inventory core metrics, October 2026; all rows quality_flag 0; price-cut shares are Realtor.com's price_reduced_share. ZIP medians mix houses, condos and townhomes and new and resale listings. Area labels are for orientation only.

What builders were listing (snapshot, November 9, 2026). Lennar's San Diego promotion page listed, among others: Cota Vera (Chula Vista) from $599,900 for 1,331 sq ft; Fusion (El Cajon) from $599,900; Mesa Verde (San Diego) at $717,900; The Hill District (San Marcos) at $739,900; OceanPointe (Oceanside) at $774,900; Sunbow (Chula Vista) at $788,900; North River Farms (Oceanside) at $1,299,900; and Harmon Ranch (Poway) from $1,447,900, above the Prop 37 cap. Builder prices, incentives and availability change weekly; treat these only as examples of where new-home prices sit relative to the cap.

What about downtown office conversions? Converted nonresidential buildings count under Prop 37, but only if the units are sold as condos to a first buyer. NBC 7 reported November 7 that an affiliate of Vintage Housing bought the 19-story 610 W. Ash tower for $26 million in September and plans an income- and age-restricted multifamily conversion, with a planned 200-unit affordable conversion at 707 Broadway as well. As reported so far, those are rental projects, and NBC 7 said none of the downtown conversions had been redeveloped yet. Do not plan a Prop 37 purchase around a conversion until a developer actually offers condos for sale.

How to run the numbers: Prop 37 vs. the options you have today

The key thing to know: CalHFA has not set the Prop 37 interest rate or term. So the math below uses assumed second-loan rates of 5%, 6% and 7% on a 30-year schedule, purely to show the scale. The first mortgage uses Freddie Mac's 7.18% survey average. Property tax uses California's 1% base rate only; many new San Diego communities also carry Mello-Roos/CFD special taxes and HOA dues, and you still need insurance, so your real payment will be higher.

Formula: monthly payment = loan × (r/12) ÷ [1 − (1 + r/12)^−360].

Example 1: a $669,900 new home (Lennar's sample price)

Example 2: the county median listing price, $889,000

Example 3: the San Diego cap, $1,380,000

What the tables tell you:

1. Prop 37 mainly solves the cash problem, not the payment problem. On the $889,000 example, it cuts the cash needed for a 20% structure from $177,800 to $26,670. But the monthly payment (about $6,370 to $6,564 before insurance, HOA and special taxes) is close to a 3%-down conventional loan ($6,583) before PMI. The savings come from avoiding PMI and from whatever below-market rate CalHFA can offer on the second loan.
2. The second-loan rate matters. Every 1-point change in the assumed Prop 37 rate moves the payment by roughly $70 to $100 a month on the $669,900 and $889,000 examples, and about $150 at the cap. Wait for CalHFA's real rate before you decide.
3. The rate on the first loan still matters most. On the $711,200 first loan in Example 2, Freddie Mac's 7.18% costs $4,818 a month in principal and interest versus $4,365 at last year's 6.22%, a difference of about $453 a month.

Can a household under the income cap actually afford a capped-price home?

Lenders compare your total monthly debt to your gross income (debt-to-income, or DTI). Using only the first loan + second loan + 1% base tax above (no insurance, HOA, Mello-Roos or other debts), here is the gross income that payment implies:

Calculation: (monthly payment × 12) ÷ DTI ratio. Actual lender limits depend on the program CalHFA adopts, your credit, reserves and other debts.

The practical takeaway: even at a generous 45% DTI, the payment on a $1,380,000 home implies about $263,700 to $271,700 of income, at or above the estimated family-of-four ceiling of $261,800, and that is before insurance, HOA dues or Mello-Roos. For most eligible San Diego households, the realistic Prop 37 zone at today's rates is new homes in roughly the $600,000 to $1,000,000 range, which lines up with the new townhomes and detached homes builders are listing in Chula Vista, El Cajon, San Marcos, Oceanside and parts of the City of San Diego.

Step-by-step: how to get ready now

Step 1 – Check the four eligibility tests today. Confirm one year of California residency, plan to live in the home, compare your household income to the estimated ceiling for your family size (for example, $209,400 for two people, $261,800 for four), and confirm you can bring at least 3% of the price from your own money.

Step 2 – Season your 3% now. Because grants and borrowed money cannot supply the 3%, keep it in your own accounts with a clean paper trail (pay stubs to savings, no unexplained deposits). At $669,900, 3% is $20,097; at $889,000 it is $26,670. Budget closing costs on top, unless CalHFA lets part of the loan cover them.

Step 3 – Fix your credit and DTI. Underwriting will follow Fannie Mae, Freddie Mac or FHA standards. Pull your reports, dispute errors, pay down revolving balances and avoid new car loans. If your score is thin, gather 12 months of rent receipts, bank statements and pay stubs; the measure requires lenders to consider cash flow underwriting.

Step 4 – Get pre-approved on today's options anyway. A pre-approval with a 3%, 5%, 10% or 20% down conventional, FHA or VA quote shows you your real price range at about 7.18%, and it will carry over when Prop 37 opens.

Step 5 – Run your own three-way comparison. For any new home you like, put three structures side by side, as in the tables above: Prop 37 (with 5%, 6% and 7% second-loan rates until CalHFA announces terms), 3% down with PMI (get a real PMI quote), and whatever larger down payment you can actually afford. Add insurance, HOA and the community's Mello-Roos/CFD tax from the builder's disclosures.

Step 6 – Ask builders the Prop 37 questions in writing. Is this community within the San Diego cap of $1,380,000 (and will it be under the 2027 limit)? Does the builder plan to opt into the "qualified builder option"? What is the CFD/Mello-Roos tax rate and the HOA budget? What incentives (rate buydown, closing-cost credit, upgrades) are available, and can they be used with an outside lender? When does each phase close?

Step 7 – Understand the qualified builder option. Builders that opt in accept added labor standards and, in return, get modified construction-defect procedures for their homes: stricter notice requirements for claims, the ability to talk directly with homeowners and to get releases for completed repairs, and a path to dismiss stalled lawsuits. The builder must disclose this to you in writing before closing. Read that disclosure, keep a list of anything you want repaired, and get a third-party inspection before closing and again before your warranty expires.

Step 8 – Do not freeze a good deal today. A program that may open as late as December 2027, with unknown rates and limited bond money, is not a reason to pass on a home that works now. Today's builder incentives, such as Lennar's limited-time 4.875% promotional rate (which required contracts signed by November 9), can be worth more than a future second loan. If you buy now, you will not be the first purchaser of the next new home, but nothing stops a future Prop 37 purchase if you still meet the tests later.

Step 9 – Compare Prop 37 with CalHFA's existing programs. CalHFA's Dream For All shared-appreciation loan works differently (no monthly payment, repaid with a share of appreciation, first-time and first-generation buyers, chosen by lottery), and its 2026 application window closed in March. Ask a CalHFA-approved lender which current programs fit you now and which might be combined with Prop 37 once CalHFA sets its rules. Remember that a down payment assistance loan cannot be your Prop 37 3%.

Step 10 – Watch three dates. Late November: FHFA announces 2027 conforming limits, which resets San Diego's Prop 37 cap. By December 11: the Secretary of State certifies the election. Then: CalHFA program rules, lender list and rate. Check calhfa.ca.gov directly rather than relying on ads.

Step 11 – Protect yourself from scams. No one can take a Prop 37 application or fee before CalHFA announces the program. Never wire a "reservation" or "application" fee to anyone claiming to offer early access.

Step 12 – Pick your agent or broker now. Prop 37 requires every applicant to retain a licensed California real estate agent or broker they choose themselves. Going into a builder's sales office with your own representation helps you compare incentives, read the purchase contract and CFD disclosures, and negotiate upgrades or credits, which builders do negotiate when inventory is high.

Mistakes to avoid

• Assuming Prop 37 is open now, or paying anyone for "early access."
• Treating the 17% as a grant. It is a second mortgage with a monthly payment.
• Using a gift-like loan or grant for your 3%; the measure excludes grants and borrowed money.
• Shopping resale homes for Prop 37; only new homes and newly converted units sold to their first buyer qualify.
• Planning around the $1,380,000 cap without checking whether your income can carry that payment at 7.18%.
• Ignoring Mello-Roos/CFD taxes and HOA dues in new communities.
• Signing a builder's contract without your own representation, inspection and a full reading of any qualified-builder disclosure.
• Waiting more than a year on a program with unknown rates while missing today's builder incentives.
• Computing price-cut share from reduction counts instead of using Realtor.com's price_reduced_share (20.5% countywide).

Quick checklist

• Residency (1 year), owner-occupancy, income vs. estimated San Diego ceiling for your household size
• 3% of target price saved in your own name, with a paper trail
• Credit report reviewed; DTI calculated with all debts
• Pre-approval on today's programs at about 7.18%
• Three-way payment worksheet (Prop 37 at 5/6/7% assumed, 3% + PMI, larger down payment)
• Builder answers in writing: price vs. cap, qualified builder option, CFD tax, HOA, incentives, phase timing
• Your own licensed agent or broker selected
• Calendar alerts for FHFA 2027 limits (late November), election certification (December 11) and CalHFA's announcement

What this means day to day

For a San Diego family earning under about $261,800 (four people), Prop 37 could eventually turn a 20% down payment from a six-figure savings goal into 3%: about $26,670 instead of $177,800 on an $889,000 home. But it is a loan, not a gift; it only applies to new or newly converted homes sold to their first buyer, priced up to $1,380,000 under 2026 limits; and at Freddie Mac's 7.18% average, the monthly payment will look a lot like a 3%-down loan without the PMI. The countywide market is giving buyers room right now: a $889,000 median ask (−4.1%), 5,735 actives (+9.69%), a 20.5% price-cut share and 48 median days on market, with builders offering rate buydowns. The smart move is to get eligible, get pre-approved and keep shopping, so that whether the best deal turns out to be a builder incentive this month or a Prop 37 loan in 2027, you are ready to act.

If you are shopping San Diego County and want help checking Prop 37 eligibility, comparing new-home communities against the county's cap, running the three-way payment math, or negotiating builder incentives with your own representation, call Choice of America at 833-THIS-BROKER (833-842-7465), visit https://choiceofamerica.com/, or see our San Diego County page at https://choiceofamerica.com/san-diego-county-real-estate.html.

Dr. Hamid Rowshan, Choice of America. DRE #02004794, company DRE #02240008.

This article is general information, not legal, tax or lending advice. Proposition 37's results are unofficial until certified, and CalHFA has not yet set the program's rates, terms, income table, application process or lender list; the second-loan rates used above are assumptions for illustration only. Mortgage rates, loan limits, tax rates, Mello-Roos/CFD taxes, HOA dues, insurance costs and builder prices and incentives change. Figures are from the public sources below as of the dates shown; your lender's quote, CalHFA's published rules and your Closing Disclosure control. Choice of America is a real estate brokerage, not a lender. Confirm every number with licensed California professionals before you buy.

Sources:

• Proposition 37 legal text (California Middle-Class Homeownership and Family Home Construction Act of 2026), annotated copy of the Official Voter Information Guide text: https://growsf.org/voter-guide/san-francisco-voter-guide-november-2026-election/measures/prop-37/legal-text/
• California Secretary of State, Official Voter Information Guide, propositions: https://voterguide.sos.ca.gov/propositions/
• Legislative Analyst's Office, Proposition 37 analysis (November 3, 2026 ballot): https://lao.ca.gov/BallotAnalysis/Proposition?number=37&year=2026
• KQED, "Californians Pass Homeownership, Affordable Housing Bonds" (Nov. 3, 2026): https://www.kqed.org/news/12106883/californians-pass-homeownership-bond-affordable-housing-funding-leads-in-early-returns
• CBS 8, "California voters approve $25B home loan initiative to aid families in purchasing new homes": https://www.cbs8.com/article/news/local/california/california-voters-approve-25b-home-loan-aid-families-new-homes/509-85ab1c7c-1103-41f6-99a0-83a454171fca
• CBS 8, "Prop 37 home loan program provides 17% down-payment for new San Diego homes" (Nov. 7, 2026): https://www.cbs8.com/video/news/local/california/prop-37-home-loan-program-provides-17-downpayment-for-new-san-diego-homes/509-46bb0be8-e417-4a44-a565-aaebbe699db9
• resideact.org, "California Prop 37 (2026): who qualifies for the homebuyer loan, and when you can apply" (updated Nov. 7, 2026; county income estimates and application status): https://resideact.org/california-prop-37-homebuyer-loan
• FHFA, Conforming Loan Limits (2026 county list; San Diego County $1,104,000): https://www.fhfa.gov/data/conforming-loan-limit
• National Mortgage Professional, "Three Competing 2027 Conforming Loan Limits — And None Is Official": https://nationalmortgageprofessional.com/news/three-competing-2027-conforming-loan-limits-and-none-official
• County of San Diego HCD, Income Limits AMI Chart (2026 AMI $130,900, effective May 6, 2026): https://www.sandiegocounty.gov/content/sdc/sdhcd/rental-assistance/income-limits-ami.html
• California HCD, 2026 State Income Limits: https://www.hcd.ca.gov/sites/default/files/docs/grants-and-funding/income-limits-2026.pdf
• Freddie Mac Primary Mortgage Market Survey (week of Nov. 5, 2026): https://www.freddiemac.com/pmms
• FRED, 30-Year Fixed Rate Mortgage Average in the United States (MORTGAGE30US): https://fred.stlouisfed.org/series/MORTGAGE30US
• Realtor.com Residential Data, county inventory core metrics (October 2026): https://econdata.s3-us-west-2.amazonaws.com/Reports/Core/RDC_Inventory_Core_Metrics_County.csv
• Realtor.com Residential Data, ZIP inventory core metrics (October 2026): https://econdata.s3-us-west-2.amazonaws.com/Reports/Core/RDC_Inventory_Core_Metrics_Zip.csv
• Realtor.com Research data library: https://www.realtor.com/research/data/
• FRED, Median Listing Price in San Diego County, CA (MEDLISPRI6073): https://fred.stlouisfed.org/series/MEDLISPRI6073
• FRED, Active Listing Count in San Diego County, CA (ACTLISCOU6073): https://fred.stlouisfed.org/series/ACTLISCOU6073
• FRED, Pending Listing Count in San Diego County, CA (PENLISCOU6073): https://fred.stlouisfed.org/series/PENLISCOU6073
• FRED, Median Days on Market in San Diego County, CA (MEDDAYONMAR6073): https://fred.stlouisfed.org/series/MEDDAYONMAR6073
• Pacific Southwest Association of REALTORS®, City of San Diego / County market stats (updated Nov. 4, 2026): https://www.psar.org/market-stats/city-of-san-diego
• Lennar, San Diego "Our Rates Are Low" promotion and new-home listings (checked Nov. 9, 2026): https://www.lennar.com/new-homes/california/san-diego/promo/sdglen_lowrates
• NBC 7 San Diego, "Downtown offices get new life as affordable housing" (Nov. 7, 2026): https://www.nbcsandiego.com/news/local/downtown-offices-get-new-life-as-affordable-housing/4098776/
• California Housing Finance Agency (CalHFA), homebuyer programs: https://www.calhfa.ca.gov/