San Diego Housing vs. the S&P 500: 3‑, 5‑, 10‑ & 20‑Year Showdown
Real estate and stocks both build wealth over time, but they do it in very different ways. Below you’ll see how San Diego home prices, mortgage amortization, and the S&P 500 stack up—plus why leverage gives property a unique edge. I do want to warn you, this is going to be fairly technical and if you don’t like numbers, you probably won’t find this interesting. I, however, am very analytical and really like diving deep into the numbers.
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Next We’re Going To Analyze Average Gains in Real Estate Using 4 Different Timeframes
Cash‑for‑cash comparison
(All periods end April 2025. Initial cash outlay equals the average San Diego County sale price at the start of each horizon, invested either in a home or in the S&P 500 price index—no dividends, no leverage.)
| Period | Initial cash outlay ≈ avg home price | After period | % Gain |
|---|---|---|---|
| 3 yrs (Apr 2022→Apr 2025) |
$1,010,065 | Real estate: $1,188,363 S&P 500: $1,361,568 |
17.7 % vs. 34.8 % |
| 5 yrs (Apr 2020→Apr 2025) |
$730,073 | Real estate: $1,188,363 S&P 500: $1,398,090 |
62.8 % vs. 91.5 % |
| 10 yrs (Apr 2015→Apr 2025) |
$570,034 | Real estate: $1,188,363 S&P 500: $1,521,991 |
108.5 % vs. 167.0 % |
| 20 yrs (Apr 2005→Apr 2025) |
$577,837 | Real estate: $1,188,363 S&P 500: $2,781,707 |
105.7 % vs. 381.4 % |
Across the 3‑, 5‑, 10‑, and 20‑year horizons, putting the same lump‑sum cash into the S&P 500 price index consistently beat buying the “average” San Diego home: stocks grew roughly twice as fast as real estate over three years and more than quadrupled the property’s appreciation over two decades. In every window the equity portfolio converted the initial purchase‑price amount into a meaningfully larger ending balance, underscoring the long‑run power of market compounding. However, these comparisons ignore the leverage that most buyers use in housing—mortgages can amplify both gains—so the picture changes once debt, carrying costs, rental income, and tax advantages enter the conversation. While nearly impossible to analyze carrying costs, rental income and the tax advantages because the variables differ so much, we will be focusing on how leverage amplifies returns.
Leveraged return with 20 % down — ROI based only on price growth
| 3 yrs (Apr ’22→Apr ’25) ≈ 5 % note |
5 yrs (Apr ’20→Apr ’25) ≈ 3 % note |
10 yrs (Apr ’15→Apr ’25) ≈ 4 % note |
20 yrs (Apr ’05→Apr ’25) ≈ 6 % note |
|
|---|---|---|---|---|
| Start Price | $1.010 M | $730k | $570k | $578k |
| Down Payment (20 %) | $202k | $146k | $114k | $116k |
| Current Price | $1.188 M | $1.188 M | $1.188 M | $1.188 M |
| Price Gain (%) | 17.7 % | 62.8 % | 108.5 % | 105.7 % |
| Price Growth ($) | $178k | $458k | $618k | $611k |
| Principal Paid (30‑yr amort.) |
$38k | $65k | $97k | $213k |
| Equity Today | $418k | $669k | $829k | $939k |
| ROI on 20 % DP | 88 % | 314 % | 542 % | 527 % |
| 3 yrs (Apr ’22→Apr ’25) • ≈ 5 % note | |
|---|---|
| Start Price | $1.010 M |
| Down Payment (20 %) | $202k |
| Current Price | $1.188 M |
| Price Gain (%) | 17.7 % |
| Price Growth ($) | $178k |
| Principal Paid | $38k |
| Equity Today | $418k |
| ROI on 20 % DP | 88 % |
| 5 yrs (Apr ’20→Apr ’25) • ≈ 3 % note | |
|---|---|
| Start Price | $730k |
| Down Payment (20 %) | $146k |
| Current Price | $1.188 M |
| Price Gain (%) | 62.8 % |
| Price Growth ($) | $458k |
| Principal Paid | $65k |
| Equity Today | $669k |
| ROI on 20 % DP | 314 % |
| 10 yrs (Apr ’15→Apr ’25) • ≈ 4 % note | |
|---|---|
| Start Price | $570k |
| Down Payment (20 %) | $114k |
| Current Price | $1.188 M |
| Price Gain (%) | 108.5 % |
| Price Growth ($) | $618k |
| Principal Paid | $97k |
| Equity Today | $829k |
| ROI on 20 % DP | 542 % |
| 20 yrs (Apr ’05→Apr ’25) • ≈ 6 % note | |
|---|---|
| Start Price | $578k |
| Down Payment (20 %) | $116k |
| Current Price | $1.188 M |
| Price Gain (%) | 105.7 % |
| Price Growth ($) | $611k |
| Principal Paid | $213k |
| Equity Today | $939k |
| ROI on 20 % DP | 527 % |
Clarifying the ROI row
ROI on 20 % DP now shows price appreciation only, expressed as a multiple of the original down payment—e.g., in the 3‑year scenario the $178 k gain equals 88 % of the $202 k put down.
This isolates how leverage magnifies returns from market appreciation alone; any additional benefit from principal pay‑down (shown in the “Principal Paid” row) would push total equity and the effective return even higher.
Why Leverage Matters—And Why It’s a Tax Perk
Leverage = Using Other People’s Money.
Buying stocks usually means you pay 100 % of the investment up front. When buying a home, you often put down a % of the home’s value and then borrow the remainder. That leverage:
-
Magnifies gains. A 10 % price increase on a $500 k property is $50 k—but if you only put $100 k down, that’s a 50 % return on your cash.
-
Forces saving. Each mortgage payment chips away at principal, quietly converting debt into equity.
-
Can be deductible. Mortgage interest is generally tax‑deductible (subject to IRS limits), meaning Uncle Sam subsidizes part of the borrowing cost—something you don’t get when you buy stocks with cash.
-
Adds inflation protection. Your loan balance is fixed in nominal dollars; as prices and rents rise, the debt effectively “shrinks” in real terms.
So How Do They Stack Up Against Each Other?
There really is so much to consider that we can’t go over here because it is based on each individual situation. These items include rental values, principal payoff amount, depreciation of assets, property taxes, interest paid, capital gains benefits, and so much more. If we were to make the most basic comparison, the following chart gives you an idea as to how each of the following investments performed over each timeframe. This is based off of a $100,000 investment.
| Asset / Period | 3 yrs | 5 yrs | 10 yrs | 20 yrs |
|---|---|---|---|---|
| S&P 500 Price‑Only Index | $135k ( +34.8 %) | $192k ( +91.5 %) | $267k ( +167.0 %) | $481k ( +385.0 %) |
| Cash Real Estate Investment ($100k investment) |
$118k ( +17.7 %) | $163k ( +62.8 %) | $208k ( +108.5 %) | $206k ( +105.7 %) |
| Leveraged San Diego Home (20 % down, price‑growth only) |
$188k ( +88.0 %) | $414k ( +314.0 %) | $642k ( +542.0 %) | $627k ( +527.0 %) |
| 3 yrs (Apr ’22→Apr ’25) | |
|---|---|
| S&P 500 Price‑Only | $135k (+34.8 %) |
| Cash Real Estate | $118k (+17.7 %) |
| Leveraged Home | $188k (+88.0 %) |
| 5 yrs (Apr ’20→Apr ’25) | |
|---|---|
| S&P 500 Price‑Only | $192k (+91.5 %) |
| Cash Real Estate | $163k (+62.8 %) |
| Leveraged Home | $414k (+314.0 %) |
| 10 yrs (Apr ’15→Apr ’25) | |
|---|---|
| S&P 500 Price‑Only | $267k (+167.0 %) |
| Cash Real Estate | $208k (+108.5 %) |
| Leveraged Home | $642k (+542.0 %) |
| 20 yrs (Apr ’05→Apr ’25) | |
|---|---|
| S&P 500 Price‑Only | $481k (+385.0 %) |
| Cash Real Estate | $206k (+105.7 %) |
| Leveraged Home | $627k (+527.0 %) |
Key Takeaways
- Leverage super‑charges San Diego real‑estate returns. Even modest price gains plus principal pay‑down can rival—or beat—unleveraged stock growth.
- Stocks still excel on pure growth & liquidity. Over 20 years, the S&P 500 turned $100 k into about $717 k with zero tenants or repairs.
- Mortgage interest is a built‑in tax break. Deductible interest lowers your after‑tax borrowing cost, giving real estate a unique boost.
- Diversification smooths the ride. Historically, holding both assets balances growth, inflation protection, and volatility.
- Money Invested is Better Than Money In Savings. Over a long-term timeframe, whether it is in real estate or the stock market, money invested performs better than money sitting in a bank account.
A Downtown Professional You Can Trust!
Contact me
for more information
Ryan Ponce - REALTOR®
DRE# 01902950
(619) 228-6790
Ryan@livingthesandiegolife.com
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