This may come as a surprise to many of our readers, but this spring is shaping up to be a pretty hot market in the Bay Area (especially the Peninsula, with the more desirable spots in the East Bay and South Bay trailing, not far behind). We have plenty of anecdotal evidence coming in from our Realtor clients and friends: multiple offers, three-day sales cycles, etc.
So the question is, where in the stats can one turn to measure this transition? Obviously we see the price charts start to march upward with greater demand. But that's not enough, because prices are influenced by lots of exogenous factors and may lag the actual demand a bit. So we decided to explore a different measurement: Days on Market. In a cool market, many properties sit around for a long time. We watched Days on Market climb upward all last year. Now however, if lot of homes are selling quickly with multiple offers, we should see that fact immediately in the Days on Market indicator.
Specifically, when watching a transition from cool to hot, we should see median DoM drop first while the mean DoM stays high. (Remember that median implies half the homes on the market are on for less that this number. And mean is the average of all properties, so a handful of homes that have been for sale for, say, 12 months keeps the average high.)
For example, our client Bart Marchioni recently sold a place in Willow Glen San Jose in 7 days when the average home has been on the market for over 100 days! Good, fresh properties come available and get sold right away, but the stale ones are still sitting around. That's your transition.
So we dove into the Bay Area housing market data to see where the hottest markets are emerging. We looked for zip codes with greater than 15 single family homes for sale, then we looked for those with the greatest percentage difference between the median days on market and the average DoM. What we found confirms what we're hearing from clients are the hottest markets. Here are the 10 hottest Bay Area housing markets ranked by percent difference in median and mean days on market:
| City (click any city name for the free research page) | Zip | Median Price | Median Time on Market (approx)* | Mean Time on Market (approx)* |
| San Jose | 95130 | $810,000 | newly listed | 8 weeks |
| San Carlos | 94070 | $1,098,000 | less than 1 month | 12 weeks |
| San Leandro | 94579 | $598,888 | less than 3 weeks | 8 weeks |
| Los Altos | 94024 | $1,649,000 | less than 1 month | 11 weeks |
| San Francisco | 94110 | $849,000 | less than 3 weeks | 7 weeks |
| Palo Alto | 94301 | $2,599,000 | less than 5 weeks | 13 weeks |
| San Mateo | 94402 | $1,388,000 | less than 6 weeks | 15 weeks |
| Oakland | 94618 | $1,124,000 | less than 1 month | 9 weeks |
| Sunnyvale | 94086 | $758,900 | less than 3 weeks | 7 weeks |
| San Ramon | 94582 | $1,098,000 | less than 5 weeks | 11 weeks |
* Days on Market rounded to nearest week. See also this post on recent DoM methodology changes we did.
So in West San Jose (Cupertino and Saratoga schools!) half the properties on the market are newly listed. But the average property has been on the market for two months. Sales rates have stayed high so this is not driven by a buildup of new inventory.
Note the theme we've been talking about for a while here: ALL of these markets are close in. These top ten zip codes are from a sample of several hundred in 12 Bay Area counties. Four of these are Peninsula towns, two in the South Bay and three in the East Bay. If the trend holds, and the number of buyers continues to grow, expect the market strength to bleed further out from the Bay Area's geographic heart. If it does, you'll be the first to know.