Most San Diego market commentary defaults to one of two narratives: prices are about to crash, or San Diego is uniquely immune to gravity. Neither has been right for the last five years, and neither will be right for 2026. The real story is more boring and more useful — three structural forces that explain every meaningful price move in the county, all moving at once but in different directions.
Here's what each force is doing right now, how they interact, and which one matters most for the next 12 months.
Force 1: Inventory
San Diego County started 2026 with roughly 3,800 active listings — the strongest start to a year since 2020, but still 18% below pre-pandemic averages.1 The county is sitting at 1.9 months of supply for single-family homes and 2.8 months for condos and townhomes,2 compared to the 5–6 months that defines a balanced market.
The structural shortage is bigger than that snapshot suggests. SANDAG estimates San Diego County adds 15,000–18,000 new households per year through population growth, migration, and household formation, while building only 8,000–10,000 new units annually. Over the seven-year period from 2018 to 2025, the cumulative shortfall reached an estimated 55,700 units.3 That's the structural backdrop — and it's not changing in 2026.
What is changing is the relative tightness. The 2022 environment of 1-month supply and 24-hour offer windows has given way to 2026's 1.9 months and 27-day median DOM. That's not a buyer's market by any traditional definition. It's a less-frenzied seller's market.
What inventory is doing in 2026
- Detached homes: 1.9 months of supply, falling slightly from 2025 highs. Below balanced.
- Condos and townhomes: 2.8 months of supply, rising as HOA pressure and assessment risk push owners to sell. Closer to balanced.
- Coastal North County: Still 1.5–2.5 months of supply due to structural California Coastal Commission supply caps.
- Inland and South Bay: 2.5–3.5 months of supply in most submarkets, the loosest in years.
Force 2: Interest rates
Freddie Mac's Primary Mortgage Market Survey shows the 30-year fixed at 6.23% as of late April 2026.4 That's down materially from the 2025 peak near 7%, and the lowest reading in over three years. Most major forecasts put the rate range for the rest of 2026 between 5.75% and 6.50%, depending on labor-market data and inflation prints.
Two distinct rate effects shape the market simultaneously:
Buyer affordability
Every 50 basis points of rate movement changes purchase power by roughly 5–6% on the same monthly payment. A buyer who can afford a $900K home at 6.23% can afford about $945K at 5.75%, or about $855K at 7.00%. That's a ±$45K–$50K swing in buying power for a relatively small rate change. The buyers who were sidelined in 2024 at 7%+ are coming back at 6.23%, and would come back in greater numbers if rates broke below 6%.
The lock-in effect
The harder-to-see force. Approximately 79% of California homeowners have mortgages with rates below 5%.5 Selling means giving up that rate and signing into something at 6%+. For households with kids in good schools, that calculus has been brutal — the equity gain doesn't outweigh the payment shock on a comparable replacement home. The lock-in effect is the single biggest reason inventory hasn't normalized despite years of price stability.
The lock-in effect starts to soften as the spread between current and locked rates narrows. At 6.23%, a household sitting on a 4.0% rate is still paying 33% less interest on every dollar borrowed. At 5.5%, that gap shrinks to 27%. At 5.0%, to 20%. Each step lower releases a bit more inventory back into the market.
A buyer's monthly payment is approximately 6 times more sensitive to rate changes than to price changes. A 50-bp rate move on a $900K loan changes the monthly P&I by ~$300. A $50K price change on the same loan changes monthly P&I by ~$50. If you're trying to predict where San Diego is headed, watch rates more than prices.
Force 3: Migration
Migration is the slow-moving force that gets the least attention and matters more than people realize. San Diego County added roughly 22,000 net new residents in 2024–2025, against a slight outflow at the California state level overall.3 San Diego is one of the few California metros that has consistently grown through the post-2020 California exodus.
Where the migration is coming from
- Bay Area outflow. Tech workers leaving SF and Silicon Valley have been a steady source. The math is straightforward — sell a $1.8M Bay Area home, buy a $1.3M San Diego home, keep $500K and a 60-degree winter.
- Los Angeles outflow. Particularly post-2025 wildfires, the relative cost-of-insurance and cost-of-living gap has widened. Some of that flow ends up in San Diego.
- Out-of-state inflow. Phoenix, Las Vegas, and Denver retirees and remote workers continue to find San Diego despite higher prices, drawn by climate and proximity.
- Military and federal employment. The base structure (Camp Pendleton, Coronado, MCAS Miramar, 32nd Street, Submarine Base, Point Loma) generates steady housing demand independent of the broader migration trend.
Where it's going within the county
The migration data isn't uniform across submarkets. Bay Area transplants tend to concentrate in coastal North County and Carmel Valley. Family migrators with kids cluster in Poway, Carlsbad, and the school-strong inland ZIPs. Retirees often choose South Bay or master-planned 55+ communities. Each submarket gets a different demand profile, which is part of why the price action diverges so much across the county.
How the three forces interact
The interesting question isn't what each force is doing in isolation — it's what happens when they align or diverge.
| Scenario | Inventory | Rates | Migration | Likely outcome |
|---|---|---|---|---|
| Most likely | Tight, modest loosening | 5.75%–6.50% | +15,000–25,000 net | +2% to +4% county-wide |
| Bull case | Tightens further | Breaks below 5.75% | +20,000+ net | +5% to +8% county-wide |
| Bear case | Loosens to 4 mo+ | Climbs above 7% | Slows to flat | −2% to −5% county-wide |
The most likely scenario isn't dramatic. Modest appreciation, modest inventory loosening, modest rate decline. The base case for 2026 is: more activity, slightly lower rates, slightly more listings, prices up 2–4% county-wide with continued submarket divergence. The price-action breakdown by submarket covers what that looks like ZIP by ZIP.
Which force matters most
For 2026 specifically: rates. The inventory shortage is structural and won't change meaningfully in 12 months. Migration is steady and slow-moving. Rates are the variable — they can move 100 basis points in a quarter, and every 50-bp move shifts buyer affordability by 5–6%.
If rates break below 5.75% and stay there, expect competition to return to most submarkets, the lock-in effect to ease, and modest-to-meaningful appreciation. If rates climb above 7% and stay there, expect inventory to keep rising, prices to soften further at the high end, and the South Bay and condo segments to take another leg down.
Watch the Freddie Mac PMMS each Thursday. It tells you more about where San Diego is going than any other single data point.
See how rate movement changes your San Diego buying power.
Open the calculator →The honest read
San Diego in 2026 is a market shaped by three forces that mostly point in the same direction: tight inventory, gradually easing rates, steady migration. The base case is unexciting modest appreciation. The bull and bear cases both require rates to break their current trading range — and both are possible, but neither is the central forecast. For buyers and sellers actually navigating this market, the practical move is to stop trying to time the headline and start running the math on the specific home, the specific submarket, and the specific monthly payment that's relevant to your actual decision.
Forecasts are inherently uncertain and depend on macroeconomic conditions outside any local market's control. Educational content only — not legal, tax, or financial advice.
References
- Team Kolker Wendlandt. (2026, January). San Diego housing market outlook 2026. Retrieved April 28, 2026, from https://www.teamkolker.com/happy-new-year-what-2025-tells-us-about-the-san-diego-housing-market/
- Greater San Diego Association of REALTORS. (2026, March). Housing supply overview. Retrieved April 28, 2026, from https://sdar.stats.10kresearch.com/docs/hso/x/report
- San Diego Association of Governments (SANDAG). (2025). Regional growth forecast and housing demand projections. Retrieved April 28, 2026, from https://www.sandag.org/projects-and-programs/data-and-research/regional-data
- Freddie Mac. (2026, April 23). Primary Mortgage Market Survey: U.S. weekly mortgage rate averages. https://www.freddiemac.com/pmms
- Federal Housing Finance Agency. (2025). Mortgage rate distribution among existing homeowners. Retrieved April 28, 2026, from https://www.fhfa.gov/data