If you’re trying to figure out how much house you can afford in San Diego, start with the monthly payment, not the sticker price — that’s the number that actually decides what you can buy. With the 30-year fixed averaging 6.66% as of the July 30, 2026 Freddie Mac survey (Freddie Mac PMMS), let me walk you through the real math on a San Diego home so you know your number before you fall in love with a listing.
Who this is for
This is for San Diego buyers — first-timers doing the math for the first time, and move-up buyers who haven’t shopped a loan since rates were in the 3s. You’ve seen that the county’s median home is holding above $1 million even as sales pick up (KPBS, July 2026), and you want to know what that actually costs per month before you get emotionally attached to a house.
The feeling I hear every week
“Can we even afford San Diego anymore?” It’s the most common thing buyers say to me, usually with a little dread. The dread comes from not knowing the number — so the whole thing feels impossible. The moment we put real figures on paper, that fog usually lifts. It’s almost never as bad, or as vague, as it feels in your head.
Start with the payment, then work backward
Affordability isn’t one number — it’s four moving parts: your down payment, the interest rate, your other monthly debts, and the property taxes and insurance on the specific home. Lenders look at your debt-to-income ratio, and most conventional loans want your total housing payment plus debts to land roughly in the low-to-mid 40s percent of your gross income. But you don’t have to memorize ratios. You just need to see the payment.
What a San Diego home actually costs per month
Here’s principal and interest on an $800,000 loan (think a ~$1,000,000 home with 20% down) at rates right around today’s average. This is principal and interest only — property taxes, insurance, and any HOA are on top:
| Rate (30-yr fixed) | Loan amount | Monthly P&I |
|---|---|---|
| 6.41% | $800,000 | ~$5,009 |
| 6.66% (today’s average) | $800,000 | ~$5,141 |
| 6.91% | $800,000 | ~$5,274 |
Two things jump out. First, a quarter-point move in rate is about $132 a month on this loan — real, but rarely the dealbreaker people fear. Second, the bigger levers are your down payment and the price you buy at, not chasing the last eighth of a percent on the rate. Rates referenced here are national averages for education, not a quote — your actual number depends on your credit, loan type, and the property.
Five ways to raise the house you can afford
- Kill a monthly payment, not a rate. Paying off a $400 car loan can lift your buying power more than waiting months for a rate dip.
- Explore low-down-payment and assistance options. You don’t always need 20% down in California — there are down-payment assistance and low-down programs many San Diego buyers qualify for and never ask about.
- Buy the payment, plan the refinance. You marry the house and date the rate — if rates ease into 2027 as some forecasts suggest, you refinance the payment down. You can’t renegotiate the price you paid.
- Get your credit optimized first. A stronger score can move your rate tier and your payment more than most people realize.
- Get fully pre-approved, not just pre-qualified. A real underwritten pre-approval tells you your exact number and makes your offer far stronger in a market where the median home still sells fast.
What most buyers get wrong
They wait for a “perfect” rate while San Diego prices keep grinding higher. Here’s the honest tradeoff: you can refinance a rate later, but you can’t go back and buy today’s home at today’s price. I’m not saying rush — I’m saying decide with numbers instead of vibes. This is exactly the kind of thing I like to map out with buyers before they’re standing in an open house doing math in their head. If you’re also working with a great agent, even better — I partner with San Diego agents to make the financing side fast, and you can see how I work alongside agents if you need a referral.
Frequently asked questions
How much income do I need to buy a $1 million home in San Diego?
As a rough guide, with 20% down at today’s rates you’d generally want household income in the ballpark of $200,000+, depending on your other debts, taxes, and insurance. The precise number is very personal — a quick pre-approval nails it down.
Do I really need 20% down in San Diego?
No. Many buyers use 3–5% down conventional, FHA, VA, or down-payment assistance. Less down means a higher payment and likely mortgage insurance, but it can get you in years earlier — we run both scenarios so you can choose.
Should I wait for rates to drop before buying?
Maybe, maybe not. If rates fall you can refinance; if prices rise while you wait, that gain is gone for good. The right answer depends on your timeline and budget — which is exactly what the math sorts out.
Let’s find your real number
Stop guessing what you can afford. Get pre-approved with me and I’ll show you your exact San Diego price range, payment, and options — no pressure, no pitch, just your real numbers. Start your free pre-approval here.
I’m Ron Berg with Berg Equity Group — I help San Diego buyers understand their real numbers and finance the right home with no pressure and no jargon. Let’s find yours.
Ron Berg · Berg Equity Group · Get pre-approved · Book a call: calendly.com/ron-calimortgageguy/30min · NMLS #974839 · C2 Financial Corp NMLS #135622 · Equal Housing Opportunity. Rates referenced are national averages (Freddie Mac PMMS) for education only and are not a quote or commitment to lend.