Updated 2026 · Based on median market data for San Francisco, CA
The median monthly rent in San Francisco, CA is $3,100, translating to $37,200 in annual gross rental income per unit. The rent-to-price ratio is 0.28% — well below the 1% rule, making pure cash flow investing challenging at median prices.
Renters in San Francisco spend approximately 62% 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 rental demand.
The vacancy rate in San Francisco 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. Population growth of 0.8% annually provides stable demand.
San Francisco's GRM (price divided by annual rent) is 30.0x. 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. For comparison, the national average GRM for investment-grade rentals is approximately 13-15x.
At the median rent of $3,100/mo, a single-family rental in San Francisco generates approximately $37,200 in gross annual income. After accounting for 5.2% vacancy ($1,934 lost), property taxes of $8,363, insurance (~$4,460), and maintenance (~$4,460), the estimated NOI is $17,983 per year, or $1,499/mo.
San Francisco vs California state average and national average across key investment metrics. San Francisco's cap rate is below both benchmarks — deal sourcing is critical here.