Updated 2026 · Based on median market data for San Diego, CA
The median monthly rent in San Diego, CA is $2,870, translating to $34,440 in annual gross rental income per unit. The rent-to-price ratio is 0.31% — well below the 1% rule, making pure cash flow investing challenging at median prices and requiring investors to target below-median purchases or value-add strategies. For context, a 0.31% rent-to-price ratio means that for every $100,000 invested in property, you collect approximately $309/mo in gross rent. The gross rent multiplier of 27.0x means it takes 27.0 years of gross rent to equal the purchase price — a high ratio that reflects price appreciation outpacing rent growth.
Renters in San Diego spend approximately 57% of the local median household income ($60,018) on rent. This exceeds the standard 30% affordability threshold, suggesting rent growth may face resistance — but it also means a large portion of the population finds buying even more out of reach, supporting deep rental demand. Landlords should be cautious about aggressive rent increases and focus instead on tenant retention to minimize costly turnover.
The vacancy rate in San Diego is 5.2%. This is a healthy vacancy rate that indicates balanced supply and demand. You should be able to find quality tenants without extended vacancies, though expect normal turnover periods of 2-4 weeks between tenants. Budget for one month of vacancy per year in your underwriting to be conservative. Population growth of 0.8% annually provides stable demand.
San Diego's GRM (price divided by annual rent) is 27.0x. A GRM above 16x means the property is expensive relative to its income. Investors here are typically betting on appreciation rather than current cash flow, which adds risk if the appreciation thesis does not materialize. For comparison, the national average GRM for investment-grade rentals is approximately 13-15x. To beat San Diego's median GRM, target properties where you can achieve rents above $2,870 through renovations, better marketing, or targeting underserved tenant segments — or buy at a discount to the $930,000 median price. Every point lower on GRM translates to roughly 0.5-0.8% improvement in your cap rate.
At the median rent of $2,870/mo, a single-family rental in San Diego generates approximately $34,440 in gross annual income. After accounting for 5.2% vacancy ($1,791 lost), property taxes of $6,975, insurance (~$3,720), and maintenance (~$3,720), the estimated NOI is $18,234 per year, or $1,520/mo. Adding an 8% management fee ($2,755/yr) reduces investor cash flow further. Before debt service, you are looking at approximately $15,479/yr in landlord net income. Whether this is attractive depends on your total capital invested — at a $186,000 down payment, the unlevered yield on equity from NOI alone is 9.8%.
Rent growth in San Diego is driven by the interplay of population growth (0.8%), income growth, and housing supply constraints. Moderate population growth of 0.8% supports steady rent increases of approximately 2.5% per year. That trajectory takes today's $2,870/mo to $3,091 in 3 years and $3,247 in 5 years. The affordability headroom of $-1,370/mo between current rents and the 30% income threshold is essentially zero, meaning rent increases must be matched by income growth to avoid tenant turnover.
The median income of $60,018 supports a mixed tenant base of young professionals, small families, and long-term renters. In a smaller market of 50,000 residents, word-of-mouth and local listing platforms may be more effective than national sites for finding tenants.
San Diego is a smaller market where professional PM options may be limited. Fees can run 10-12% of rent, and the quality of available managers varies widely. At $2,870/mo, management costs roughly $316/mo. Self-management makes sense if you are local, have fewer than 5 units, and the rent level justifies your time — at $2,870/mo per unit, the income per unit is high enough that professional management is clearly affordable and preserves your time for deal sourcing.
San Diego vs California state average and national average across key investment metrics. San Diego's cap rate is below both benchmarks — deal sourcing is critical here.