San Diego County sits at a median home price of $940,986 against median rent of $2,990, producing a rent-to-price ratio of 0.038, or roughly 38 cents of monthly rent per $1,000 of asset value. The gross yield implied by that ratio is approximately 3.8%, and the modeled cap rate comes in at 2.48%. Those numbers place San Diego firmly on the appreciation end of the cash-flow-versus-appreciation spectrum, closer to a bond proxy than an income-producing asset. The county scores 27 out of 100 on cash flow, 47 on appreciation, and lands at the 1st national percentile overall (rank 773 of 1,000), which tells you plainly that the market extracts a steep price premium relative to the income it throws off.
The investment estimate makes the cash-flow math concrete and uncomfortable. At a $940,986 purchase with 20% down ($188,197), a 6.85% 30-year mortgage produces a $4,933 monthly payment. Add $1,047 in estimated operating expenses and the all-in monthly carry is roughly $5,980. Against $2,990 in rent, the modeled cash flow is negative $2,989 per month, a cash-on-cash return of -16.57%. This is not a market for a cash-flow buyer under conventional financing at current rates. It suits an appreciation buyer with patient capital and a long hold horizon, or an investor who can bring substantial equity to compress the debt service, or someone targeting value-add plays where a significant rent premium over the market median is achievable. Anyone underwriting to current rents at conventional leverage should budget for a meaningful monthly subsidy from other income sources and price that carry cost into their total return model before committing.
The $706 monthly combined tax and insurance figure, derived from a 0.73% state-average effective property tax rate and a 0.17% insurance rate, is material context here but works in the investor's relative favor. California's effective property tax rate is low by national standards, and at 0.73% it is flagged as "normal" in the data, meaning it does not add an outsized drag on top of the already-thin yield. Worth noting: this is a state-average estimate (Tax Foundation 2024), and actual rates at the county or special district level in San Diego can differ, so confirm the specific parcel's tax bill before closing. On insurance, San Diego's wildfire exposure is real, and while the 0.17% rate is what the model carries, investors should get property-specific quotes, particularly for assets in eastern or hillside zip codes, before treating that line item as firm.
Turning to the neighbor comparison, San Diego's rent-to-price ratio of 0.038 is roughly in the middle of its peer group. Los Angeles County comes in at 0.039 on a $859,958 median, offering a slightly better income ratio at a meaningfully lower entry price and the same overall score of 33. Napa County posts a 0.040 ratio at an $868,337 median, edging out San Diego on yield per dollar deployed. Orange County is worse on both dimensions: $1,139,098 median with a 0.033 ratio and the same score of 33. Santa Cruz County, at a 0.037 ratio and $1,098,636 median, scores 34 overall but demands more capital for marginally inferior income dynamics. Mendocino County is the outlier: a 0.043 ratio and a $482,788 median deliver the best gross yield in the group, though its overall score of 31 and smaller, less liquid market reflect distinct demand and liquidity risks. The case for choosing San Diego over these neighbors comes down to depth and liquidity. With a population of 3.29 million, the county offers tenant pool breadth, property type diversity, and resale market depth that Napa, Santa Cruz, and Mendocino cannot match. An appreciation buyer who wants exposure to a large Southern California coastal market at a lower price point than Orange County, and who is willing to accept the same cap rate for better underlying liquidity and scale, has a reasonable argument for San Diego over its neighbors. A yield-focused buyer chasing the best rent-to-price ratio, however, is better served by Los Angeles or Napa at current pricing, and should not anchor to San Diego's size as a substitute for income returns.
| Scenario | Purchase price | Monthly cash flow | Cap rate | Cash-on-cash |
|---|---|---|---|---|
75% of median value-add or distressed | $705,740 | -$1,756/mo | 3.3% | -13.0% |
Median typical MLS deal | $940,986 | -$2,989/mo | 2.5% | -16.6% |
125% of median newer / premium | $1,176,233 | -$4,222/mo | 2.0% | -18.7% |
Median Home Price
Median Rent
Historical data from Zillow ZHVI/ZORI
* Based on county median values. 35% expenses include taxes, insurance, maintenance, vacancy, and property management. Actual results vary by property.
Based on 3.81% rent-to-price ratio. Higher ratios indicate stronger cash flow potential.
Based on -0.6% YoY price growth. Moderate growth (3-8%) scores highest.
Population data not available.
Based on price relative to estimated local incomes.
Scores are calculated using real Zillow home value and rent data, Census population data, and economic indicators. The weighted average produces the overall investment score. Markets with missing rent data use estimated values based on regional averages.
San Diego County in California scores 33/100, ranking #773 of 1,000 US counties (top 99%). At 20% down and current rates, a median-priced rental loses about $2989/month; the 3.81% gross rent-to-price ratio doesn't survive debt service. The thesis here is appreciation, value-add, house hacking, or all-cash.
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