Mission Valley (92108) vs City Heights (92105): Cashflow math at 20% down

Prop2Profit's analysis of 2966 active listings as of September 7, 2026.

Where the cashflow is least-bad (numbers you can act on)

Mission Valley (92108), City Heights (92105) and College Area / SDSU (92115) register the smallest negative monthly full cashflows in our set under Prop2Profit's default deal assumptions (20% down, 7% rate, 30-year loan, 10% PM, 8% vacancy, 5% capex, 1% maintenance). Mission Valley — median price $517,450, est. rent $2,836 — shows a median full cashflow of -$2,067/mo. City Heights (median $699,450, rent $3,307) is -$2,533/mo. College Area (median $832,000, rent $3,189) is -$2,941/mo. Those figures are real: none of these zips are cashflow-positive at the defaults.

Annualized, that’s a -$24,804 hit for Mission Valley, -$30,396 for City Heights and -$35,292 for College Area. With 20% down payments of $103,490 (Mission Valley), $139,890 (City Heights) and $166,400 (College Area), cash-on-cash returns are approximately -24.0%, -21.7% and -21.2% respectively — negative returns, not small positives.

What moves the needle: rent, down payment, or rate

The simplest sensitivity for a cashflow investor: rent growth. To get to cashflow-neutral at current mortgage pricing (dataset assumes 7%), Mission Valley rents would need to rise from $2,836 to about $4,903/mo — a +72.8% jump. City Heights would need +76.6% (to ~$5,840/mo) and College Area +92.2% (to ~$6,130/mo). Those are impractical near-term targets; they show why pure cashflow buyers avoid most San Diego neighborhoods unless rents reset dramatically.

Larger down payments matter, too: the negative CoC numbers above come mostly from debt service. Increasing down from 20% to substantially higher (or buying all-cash) will reduce the monthly shortfall, but buyers should model the specific deal math — how much additional principal reduction you buy per dollar of extra down payment — before acting. The national 30-year fixed rate was 6.71% for the week of 2026-09-03; a move from 7% to 6.71% slightly lowers monthly debt service but does not materially change these large negative cash-on-cash outcomes.

If your strategy is cashflow-first, these three zips present the least-bad starting points in San Diego under current market pricing, but they are still negative at standard leverage. The actionable paths are clear: (1) hunt below-median price comps or off-market deals that improve the cap rate, (2) structure higher down payments, or (3) target value-add rents (units where upgrades can sustainably push rent well above market). Run the scenario you expect using the calculator and compare cap rates in our guide at cap rate before committing.