A real estate investor visiting properties in San Francisco scratched his head while calculating rental yields. Both rents and home prices are rising, yet the numbers from the yield calculator were surprisingly tight. This area is a rare market where both are increasing together, which can be confusing for calculations.

According to Redfin, the median sale price in San Francisco County has recently reached $1.8 million, a 14.1 percent increase from a year ago. Zillow reports the average home value at $1,393,773, which is up 7.6 percent. Both figures are moving in the same direction. Recent market analyses commonly explain that the resurgence in sales prices is due to the booming AI industry leading to more office returns, coupled with a lack of inventory.

Rents are rising even faster. Data from Zumper shows that the median rent for a one-bedroom has climbed to $4,300, a 25.7 percent increase from a year ago. Reports indicate that two-bedroom rents have hit around $6,000. Simply put, this means that the monthly rent burden for new movers has increased by more than a quarter in just one year.

A concept to consider in this situation is the price-to-rent ratio, which compares the sale price to the rent. In simple terms, this is the number you get when you divide the current home price by the annual rent, showing how many years it would take to recover the home price through rent alone. Dividing Zillow's average home value of $1,393,773 by the annual rent of $51,600 for a one-bedroom gives a figure around 27. A ratio above 20 suggests that renting is relatively more favorable, indicating that San Francisco leans towards being a rental-friendly city.

However, there is a common point of confusion here. Just because the ratio leans towards renting does not mean that renting is always cheaper. Since rental prices are rising so quickly, the absolute amount paid each month, whether rent or mortgage, is burdensome regardless. This ratio is merely a comparative indicator of which option is relatively more favorable, not an absolute answer. Especially in a market like San Francisco, where both sale prices and rents are surging simultaneously, it is more practical to gauge how long this upward trend will continue rather than focusing solely on the ratio itself.

If approaching this from an investment perspective, one should not only look at rental yields but also consider vacancy risks. In a market where rents are rising so quickly, the speed at which tenants may leave due to affordability issues could also increase. With a 20 percent down payment, around $280,000 is needed, so it is crucial to assess whether you can handle the initial capital requirements realistically.

If you are looking to live in the property, the situation is somewhat different. If you have adequately prepared for the down payment and plan to stay in the area long-term, considering the current rise in rents, purchasing may provide a more stable long-term home. If your stay is short or you anticipate moving in the future, it may be safer to rent and observe the market rather than jumping into a purchase during such a rapid increase. Since the initial entry costs and management fee structures differ for condos, townhouses, and single-family homes, it is advisable to compare them separately by property type.

For families considering school districts, please note that assigned schools can vary by address and may change frequently, so be sure to verify directly before purchasing.

San Francisco has always been considered a market with significant fluctuations. Just a few years ago, rental prices dropped sharply due to the rise of remote work, and now they are rebounding again. The market tends to fluctuate based on the booms and busts of specific industries. Rather than concluding that the current surge is a long-term trend, it is important to remember that similar rebounds and corrections have occurred in the past.

The figures in this article are based on data collected at different times by Redfin, Zillow, and Zumper, and actual property prices and rents can vary significantly based on neighborhood and property condition. This is not investment or legal advice, and it is recommended to consult a real estate professional before making any actual contracts.