October 2023 San Mateo County Market Update

Rumana Jabeen • October 6, 2023

The Bay Area real estate market has been stabilizing in recent months, with slowing sales and homes staying on the market longer, all with slowly increasing inventory. This is due to a number of factors, including rising interest rates, inflation, and a limited supply of homes for sale that meet current buyer affordability.

Slower economic growth and cooling inflation will bring down mortgage interest rates in 2024 and create a more favorable market environment to spur California home sales next year, according to a housing and economic forecast released today by the CALIFORNIA ASSOCIATION OF REALTORS® (C.A.R.)

A graph showing the number of listings and the number of sales

In the above chart, you can see since July 2023 as the summer market was coming to a close, the number of new listings vs sales has grown further apart. New listings increased from 683 in October 2022 to 861 in September 2023, an increase of 26%, while in the same period sales dipped from 511 in October 2022 to 502 in September 2023, a decrease of 1.8%.

A graph showing the number of months of inventory

Despite the increasing difference, our market still has a limited supply of homes. In September 2023 there was 2.7 months of inventory, which was a similar inventory level in February 2023. Compare that to April 2020 and May 2020 when San Mateo County had 3.3 and 3.4 months of inventory, respectively. This was a period when sales essentially came to a grinding halt because of the developing COVID-19 pandemic.

A graph showing the number of days to sell average

Days on market, another excellent metric of market velocity, also tells a good story. While days on market has been increasing over the last few months, it has dropped in the last month, and down from the highest point this year of 43 days on market in January 2023.


What does this mean for buyers and sellers?


What buyers need to know is this means there is more inventory to choose from, less competition for homes that are available, and homes are on the market longer giving you more time to make decisions. While our market still outpaces the national norms, there’s also good opportunity and sellers may be more willing to negotiate on price, especially if their home has been on the market for a while.


What sellers need to know is this means it may take longer to sell your home. However, if your home is priced competitively and stands out from other listings, you should still be able to sell your home for a good price and in a faster amount of time.


Sellers should follow Rumana’s “Four Well’s” when selling their home. Homes should be well prepared, well priced, well marketed, and well presented to maximize returns.

A screenshot of a financial report for san mateo
A foster city equity report is shown on a white background
A screenshot of a san mateo county equity report
By Rumana Jabeen August 20, 2026
Summer didn't bring enough new homes to meet buyer demand. Now, a growing pool of motivated buyers could be setting the stage for a very active fall across San Mateo County. Summer is winding down, and normally this is the point when I look back at the season and see a market that has taken a bit of a breather. This year, I see something different. We did get some new inventory over the summer, but not nearly enough to keep pace with demand, particularly for single-family homes. At the same time, buyers never really went away. Many are financially prepared, motivated, and actively searching, but they simply haven't found the inventory they need. That leaves us heading toward fall with an interesting combination: limited supply, persistent demand, and buyers who are becoming increasingly eager to make a move. I don't know yet exactly how the fall market will play out, but the ingredients are in place for a very active season. Summer Never Delivered the Inventory We Needed Summer usually gives buyers more choices. New listings arrive, activity spreads across more properties, and the market tends to settle into a somewhat more relaxed rhythm. That wasn't really the story this year. Single-family home inventory remained particularly tight across San Mateo County. When desirable homes did come to market, buyers often competed aggressively for them. Since May 1, 1,067 single-family homes have sold across San Mateo County. Of those, 798 sold above their asking price, and 125 sold for at least 120% of asking. That tells me something important. Demand isn't missing. In many cases, buyers simply haven't had enough homes to choose from. We're seeing an even more extreme version of that dynamic in San Francisco, where more than 140 homes sold for at least $1 million above asking during the first half of 2026. That is an extraordinary increase from only eight such sales during the same period last year. San Mateo County is its own market, and I would never suggest that San Francisco's results automatically translate to the Peninsula. But both markets demonstrate what can happen when motivated buyers compete for limited desirable inventory. Where Did All the Buyers Go? They are still here. I'm currently working with three highly motivated buyers who are financially prepared and ready to purchase. Their challenge isn't deciding whether they want to buy. It is finding the right single-family home to buy. And they are certainly not alone. Every buyer who spent May, June, July, and August waiting for the right property does not simply disappear when summer ends. Many carry that search into September and October with even greater motivation. That is the pent-up demand I am watching now. If fall brings a meaningful increase in new listings, we could see that demand spread across a healthier selection of homes. If inventory remains constrained, competition for the best properties could become even more pronounced. Either way, buyers should be preparing now rather than waiting for the fall market to officially "begin." Sellers, You Haven't Missed Your Window For homeowners, I think this is the most important takeaway from the summer. If you considered selling earlier this year but didn't, you haven't necessarily missed your opportunity. In fact, time may be on your side. There is a pool of buyers who have spent months searching without finding the right home. If your property matches what those buyers have been waiting for, coming to market this fall could put you in front of an unusually motivated audience. That does not mean every home will automatically receive multiple offers or sell substantially over asking. The fundamentals still matter. Your price has to match your product. Your home has to be positioned against the other choices buyers have across the Peninsula, not just the house down the street. Presentation, condition, location, and pricing strategy will determine whether buyers see your home as the opportunity they've been waiting for. A strong market can create opportunity, but strategy is what converts that opportunity into a successful sale. Advice for Buyers This Fall If you have been waiting for more inventory, use the remaining weeks of summer to get completely prepared. Make sure your financing is current, know your true comfort range, and be clear about which features are essential versus negotiable. More homes may come to market this fall, but the best single-family properties are unlikely to sit around waiting for you to decide. Patience has been necessary this summer. This fall may require decisiveness. Advice for Sellers This Fall If you have been wondering whether you waited too long to sell, let's change the question. Instead of asking whether you missed spring or summer, ask what your specific home would be competing against if it came to market this fall. That is something we can evaluate now. We can look at recent sales, current inventory, buyer activity, your home's condition, and where it fits within its price bracket. If the opportunity is there, the next few weeks give us time to prepare intentionally rather than rushing to market. Summer left us with fewer homes for sale, not fewer buyers. That distinction could define the fall market. The best time to start your strategy was yesterday. The next best time is today.
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