Is the Marin County housing market up or down this year? Ask four different sources and you'll get four different answers, and at least two of them flatly contradict each other.
Over the three months ending in May 2026, one national portal's tracker put the county's median sale price at $1.6 million, down 5.7 percent from a year earlier. Another portal's home value index showed typical Marin home values at $1,449,224 as of June 2026, down 7 percent year over year. Meanwhile, a review of single-family closings for the second quarter of 2026 put the median sale price at $1,865,000, up from $1,802,508 in the same quarter of 2025. And a separate report on April 2026 closings alone showed a median of $1.55 million, up 3.3 percent year over year.
None of these numbers are wrong. They're measuring different things: some track every residential property type over a rolling three-month window, one uses a modeled valuation index rather than actual closed sale prices, and others isolate single-family homes for a single quarter or month. In a county where the whole market moves on a few hundred transactions, that's enough to send the headline number in opposite directions depending on which slice you're looking at.
San Anselmo shows how sharp that noise can get inside a single town. Over the same three months ending in May 2026, San Anselmo's median sale price was reported down 21.6 percent year over year, even as its median price per square foot was up 4.6 percent over the identical span. Only 41 homes sold there in May. A handful of transactions on either end of the price range can swing a median that far in a market that small.
None of this means Marin is destabilizing. The county's 2026 property assessment roll, certified this summer by the Marin County Assessor-Recorder-County Clerk, grew 3.62 percent to $114.1 billion, adding roughly $4 billion in assessed value even as higher interest rates and affordability challenges shaped market activity. The foundation is steady. The headline medians are just too noisy, at both the county and city level, to tell you what your specific house will do.
The Number That Actually Predicts Your Sale
So what does predict it? Not location on its own, and not the list price you choose. It's how many days your home sits before it goes under contract.
A review of BAREIS MLS data covering 615 single-family closings countywide between March 1 and June 1, 2026 found the county's median original list price that spring was $1,795,000. Of those 615 homes, 77 percent went under contract within 30 days and closed at an average of 105.33 percent of their original list price. About 4 percent sat past 120 days, and those closed at an average of just 84.12 percent of original list.
That's a spread of roughly 21 percentage points between a fast sale and a slow one. Applied to the county's typical original list price, it works out to a difference of more than $380,000 depending entirely on how quickly the home found a buyer.
That gap doesn't land the same way in every town. Here's how it broke down across Marin during that same spring window:
| Town | Spring 2026 Median Sale Price | Share Closing Within 30 Days | Sale Price vs. Original List (Fast Sales) | Closings |
|---|---|---|---|---|
| Mill Valley | $2.55M | 85% | 109.7% | 99 |
| San Anselmo | $1.8M | 80% | 107.21% | 56 |
| Tiburon | $3.425M | 78% | 103.07% | 46 |
| Kentfield | $3.814M | small sample | 111.7% | 12 |
| Novato | $1.37M | 67% | 101.42% | 112 |
Mill Valley posted both the highest share of fast closings and the biggest premium for them, 85 percent of its sales closed within 30 days at nearly 10 points over original asking. San Anselmo wasn't far behind, with 80 percent closing fast at a 7.21 percent premium. Kentfield's 111.7 percent overbid is the highest number on the table, but it rests on just 12 closings, small enough that one large sale can move the whole figure. Treat it as a signal of strong equity-driven demand in that price tier, not a stable statistic to plan a listing around.
Novato sits at the other end. It posted the lowest premium for fast sales, essentially at asking, and the smallest share of homes closing within 30 days of any major Marin town. Novato buyers finance more of their purchases than buyers in the county's upper towns, so their behavior tracks the 30-year mortgage rate directly. When rates move, Novato tends to feel it first, which makes it a useful early read on where the rest of the county may be headed.
Two towns didn't fit neatly into the table but are worth knowing. Larkspur and Corte Madera had essentially no stale-market tail that spring, the lowest-variance outcome of any Marin submarket, good news for sellers there and not much room to negotiate for buyers. San Rafael showed the widest spread of any high-volume town: listings that crossed 90 days closed around 78 to 79 percent of original list, compared to roughly 104 percent for its fast sales, a 26-point gap.
What This Means If You're Selling
The county median can't tell you which side of that spread your home will land on. Your pricing and preparation decide it, largely inside the first two to four weeks on market.
In a town like Mill Valley or San Anselmo, where fast sales are already closing well above original ask, the cost of missing that early window is real. A home that drifts past 90 or 120 days isn't just sitting longer, it's typically moving into a different, weaker pricing outcome entirely, the kind reflected in that 84 percent countywide figure for stale sales. The homes that captured the biggest premiums this spring weren't necessarily the ones priced highest. They were the ones ready to show and priced to current buyer appetite from day one, which is exactly where staging, Compass Concierge project management, and disciplined pricing earn their keep before a listing ever goes live.
What This Means If You're Buying
Negotiating room in Marin is real, it's just unevenly distributed. It shows up most in towns like San Rafael, where the spread between fast and slow sales is widest, and least in towns like Larkspur and Corte Madera, where there's barely a stale tail to negotiate against.
At the top of the market, patience alone isn't a strategy. Kentfield and Tiburon's small sample sizes and strong overbid numbers this spring suggest equity-rich buyers who move on their own timeline rather than the mortgage market's. Waiting for a listing to look tired in those towns may mean waiting for something that, statistically, rarely happens. Spotting the right listing before it tips from fresh to stale, and understanding why a specific seller might already be motivated, is where local relationships and off-market knowledge matter more than watching a days-on-market counter.
FAQ
Does hitting 30 days on market mean my home is already "stale"? No. The 30-day mark is where the fastest, highest-premium sales cluster, not a cliff. The real drop-off in this spring's data appeared much further out, past 90 to 120 days, when discounts against original list widened sharply.
If fast sales get the biggest premiums, should I underprice to guarantee a quick sale? The data doesn't support pricing low as a strategy. It supports pricing accurately to what buyers in your specific town are paying right now, and being fully prepared to show well from the first day, so your home competes inside that early window instead of drifting past it.
Why do small towns like Kentfield show such extreme numbers? Volume. With only a dozen or so closings in a season, one or two high-value sales can swing a median or an overbid percentage dramatically. Numbers from towns with fewer transactions should be read as directional signals of demand, not fixed benchmarks.
If you're trying to figure out what any of this means for a specific address, whether you're timing a listing in Mill Valley or comparing what your budget actually buys across Kentfield, Tiburon, or San Anselmo, that's the conversation worth having before you price anything. The Brody Team has spent four decades tracking exactly this kind of town-by-town detail across Mill Valley and upper Marin. Contact The Brody Team to talk through where your home, or your search, actually stands in this market.
