The most expensive residential sale in Napa County in September 2026 was listed at $12 million and closed at $10.8 million after 469 days on the market. That gap of $1.2 million, roughly a tenth of the asking price, is a better guide to this fall's market than the number most buyers will see first. Across the rest of the county, the gap between asking and selling price was much smaller. Buyers comparing Napa with other valley towns should think about price, time on market and room to negotiate together.
The number most buyers see first is a supply figure, and right now it looks dramatic.
A supply figure built on one weak month
In September 2026, the California Association of Realtors put Napa County's unsold inventory index at 8.5 months, up from 6.6 months in August and 7.4 months in September 2025. The figure for the San Francisco Bay Area as a whole was 2.6 months. Marin was at 2.2 and San Francisco at 1.6. On that one reading, Napa has the slowest housing market in the region by a wide margin.
The index estimates how many months current listings would take to sell at the current sales pace. It is a ratio, so it rises when listings increase or when sales fall. In Napa this September, sales fell. C.A.R. reported Napa County single-family sales down 24.1% from August and 16.0% from September 2025.
New listings did not change much. BAREIS MLS counted 173 new residential listings in Napa County in September 2026 and 174 in September 2025. In August the counts were 154 in 2026 and 161 in 2025. Sellers are not rushing to list. The jump in supply came almost entirely from one soft month of closings.
Count August and September together
A county with only about a hundred residential closings a month can swing sharply on how a few escrows happen to fall across month-end. That is what happened here. September was weak, but August had been strong.
| Napa County, BAREIS residential closings | 2025 | 2026 |
|---|---|---|
| August | 87 | 111 |
| September | 107 | 84 |
| August and September combined | 194 | 195 |
Over the two months, Napa County closed one more home than it did a year earlier. C.A.R.'s single-family data shows the same seesaw. Napa sales were up 23.9% year over year in August 2026, then down 16.0% in September.
The median price moved the same way. C.A.R.'s Napa County single-family median was $947,000 in August 2026, 2.9% below August 2025. In September 2026 it was $918,000, 2.0% above September 2025. Taken a month at a time, the headlines would have said prices fell, then rose. Over the two months, prices are roughly flat, sales volume is flat, and new listings are flat.
The steady volume hides a change in which homes are selling, and that change is easiest to see inside the city.
Inside the City of Napa, sales rose while the average price fell
BAREIS reports the City of Napa as its own area. Here is late summer 2026 compared with late summer 2025.
| City of Napa, BAREIS residential | Sales | Average price | Average days on market |
|---|---|---|---|
| August 2025 | 47 | $1,155,674 | 73 |
| September 2025 | 70 | $1,270,149 | 82 |
| August 2026 | 79 | $1,142,423 | 92 |
| September 2026 | 54 | $1,003,302 | 60 |
Combined, the City of Napa closed 133 residential sales in August and September 2026, compared with 117 in the same months of 2025. Total sales value was about $144.4 million in 2026 and about $143.2 million in 2025. So the city sold more homes for nearly the same total. The average sale fell from about $1.22 million to about $1.09 million. For the full year 2025, BAREIS recorded 670 City of Napa sales at an average of $1,253,640.
The mix of homes selling in the city moved toward lower prices. Homes around the middle of the market kept closing, and fewer closings came from the top of the range. The county figures that follow show that when higher-priced homes do sell, they close at a larger discount to their asking price.
The discount grows with the price
BAREIS publishes average and median list and sale prices for the county. A rough sale-to-list ratio for each comes from dividing the sale figure by the list figure. In September 2026:
- Median home: listed at $750,000 and sold at $728,500, about 97% of list.
- Average home: listed at $1,128,576 and sold at $1,068,947, about 95% of list.
- Top sale: listed at $12 million and sold at $10.8 million, about 90% of list.
A year earlier the averages showed the same pattern. In September 2025 the county's average list price was $1,302,299 and the average sale was $1,234,375, also about 95%. The median ratio that month was about 96%. The average is pulled toward the higher-priced end, so its ratio sitting below the median's means pricier homes are closing further below their asking prices. The top sale shows the same thing at its most extreme.
Time on market follows the same split. C.A.R. reported Napa County's median single-family time on market at 69 days in September 2026, down from 91 in August and 114 in September 2025. BAREIS shows the average residential sale taking 63 days in September 2026, compared with 103 a year earlier. So the homes that sell are selling faster than last year, while the most expensive closing of the month took more than fifteen months. Both are true at once, which means the 8.5-month figure is not true of any one listing. Supply is short for homes priced where buyers expect, and long for homes still waiting for a buyer at their original asking price.
What a cash buyer brings to this market
C.A.R. blames the statewide slowdown largely on financing. The 30-year fixed mortgage rate averaged 6.86% in September, up from 6.67% in August and 6.35% a year earlier. Its chief economist expects the pressure on prices to stay limited:
"On the supply side, the mortgage rate lock-in effect continues to constrain new listings, while limited inventory is helping to cushion home prices against weaker demand. These competing forces suggest that slower sales may not translate into a comparable decline in prices in the near term."
Jordan Levine, Senior Vice President and Chief Economist, California Association of Realtors
Napa fits that description. New listings are flat and prices are roughly steady. At the upper end of the Napa market, many purchases close in cash, so higher rates matter less there and the effect works differently. When some financed buyers step back from a higher-priced home, the seller of that home has fewer offers to choose from. A cash offer with a short close is then competing against fewer bids.
A cash buyer's leverage therefore depends on two things: how long the home has been listed and where it is priced. A well-priced home near the county median that just came on the market is selling at close to its asking price. The county's median home in September 2026 sold in 50 days. A higher-priced estate that has been listed for several months belongs to the group where the September figures show the widest discounts. In Napa this fall, the useful questions about a listing are how long it has been on the market and whether its price has been reduced. The 8.5-month county figure answers neither.
A few questions buyers ask about these figures
Is Napa a buyer's market this fall? For some homes it is. Well-priced homes in the middle of the market are moving faster than they did a year ago. Higher-priced homes that have been listed for a long time are where September's numbers show sellers accepting larger discounts.
Why do C.A.R. and BAREIS report different medians? C.A.R.'s Napa median of $918,000 for September 2026 covers existing single-family detached homes. BAREIS's residential median of $728,500 includes condominiums and mobile and floating homes as well. Each one is more useful for tracking change over time within its own series than for comparing with the other.
Does one month of data say much in Napa? Not on its own. With roughly a hundred county closings a month, a few escrows moving across month-end can change the year-over-year headline from an increase to a decrease. Looking at two or three months together gives a steadier picture.
Before you make an offer on a Napa estate, it helps to know how long it has been listed and where it sits against comparable recent sales. Yvonne Rich can look at a specific property, its listing history and recent closings near its price, so you know where there is room to negotiate. Contact Yvonne.
