Napa, Sonoma and Marin Luxury Market Report: How to Read It
The Napa luxury real estate market, like Sonoma’s and Marin’s, is best read through a few measures taken together: median and average sale price, price per square foot, days on market, months of inventory and the sale-to-list ratio, each for a stated price threshold and time window. The market report on this page draws on MLS data; the text below explains how to read it, and every figure we quote in the text comes from the California Association of REALTORS® (C.A.R.) with its date. We don’t add our own luxury statistics here.
Luxury numbers mislead more often than countywide numbers do. Few homes sell at the top in any month, the homes are less alike, and one estate with acreage or a vineyard can move an average by itself. A reader who knows what each measure captures, and what it leaves out, will get far more from any report, ours included. If you want the wider picture first, our luxury real estate guide covers what is driving demand in wine country and Marin.
Luxury market report
What the market report on this page shows
The report is built from listings and closed sales entered in the MLS by participating brokers. That makes it timely and detailed, but it has limits worth keeping in mind.
- It counts MLS activity. Sales that never went through the MLS, such as some private or office-exclusive sales, may not appear. Our page on selling a luxury home privately explains how those sales work under current MLS rules.
- Its geography and filters set the answer. A report for a town, a ZIP code or a whole county, with or without condos, can give very different medians for the same month.
- It won’t match every published figure. C.A.R., portals and other brokerages use their own geographies, property types and windows, so differences between sources are normal. Compare like with like.
How to read each measure
The table explains what each common measure tells you and the caution that applies at the top of the market. Where C.A.R. publishes a definition, we use it.
| Measure | What it tells you | Caution at luxury price points |
|---|---|---|
| Median sale price | The middle sale: half sold for more, half for less | With a handful of sales, the mix of homes that happened to close can swing it month to month |
| Average sale price | Total sales volume divided by the number of sales | One very large sale pulls the average up; when the average sits far above the median, a few big sales are doing the work |
| Price per square foot | C.A.R. calculates it as sale price divided by finished square feet | Land, views, vineyards, guest houses and outbuildings all sit inside the price but outside the square footage |
| Days on market | How long homes took to sell; C.A.R. reports the median | Check whether a report counts days for the current listing only or across relistings |
| Months of inventory | C.A.R.’s Unsold Inventory Index: the months needed to sell the supply on the market at the current sales rate | A few extra listings can double the figure when monthly sales are in single digits |
| Sale-to-list ratio | C.A.R. divides the final sale price by the original list price | Some reports use the last list price instead, which hides earlier price cuts |
| Active, pending and closed counts | Supply, contracts in progress and completed sales | Pending counts lead closed sales by roughly an escrow period, so read them as an early signal |
The small-numbers problem
The top of the market is thin. In a month with six luxury sales, one sale is a sixth of the data, so a single trophy estate or a single discounted sale can move the median and the average sharply. That is a property of the arithmetic, not a sign that the market changed.
Three habits help:
- Widen the window. Read three-, six- and twelve-month figures alongside the single month.
- Compare the same window a year apart. Seasonality is strong in wine country and Marin, so compare spring with last spring, not with last winter.
- Look at the sales themselves. When a figure moves, open the closed sales behind it. Acreage, a vineyard, a guest house or a dated interior usually explains more than any trend.
Where luxury starts in each county
There is no official luxury threshold. C.A.R. reports the share of sales at $1 million and above statewide, but it does not define luxury by county, and private reports pick their own cutoffs. Two methods are common, each answering a different question, and a third line matters for financing.
- A fixed price threshold, such as $2 million, $3 million or $5 million. It is easy to explain and to compare over time, but it means different things in different counties.
- A financing line. FHFA sets a conforming loan limit each year, by county, on the size of single-family mortgages that Fannie Mae and Freddie Mac may buy, and larger loans are generally called jumbo loans. It is a lending boundary, not a definition of luxury, but it often decides how a top-tier purchase is financed. Check FHFA’s current county list for the figure.
- A share of local sales, such as the top tenth of closed sales in a county over the past twelve months. It adjusts to each market, but the cutoff moves as prices move, so the report should state the cutoff it used.
The same dollar figure sits at very different points in each market. Using C.A.R.’s September 2026 single-family medians, by our arithmetic a $3 million sale is about 1.5 times the San Francisco median, about 1.8 times the Marin median, about 3.3 times the Napa median and about 3.4 times the Sonoma median. Any luxury figure should state its threshold and its time window; if it doesn’t, ask before you rely on it.
Public benchmarks: C.A.R. September 2026
C.A.R.’s monthly release, published October 19, 2026, gives county medians for existing single-family homes at all price levels. These are not luxury figures, but they give the market context against which the top tier should be read.
Three method notes from the same release help. C.A.R. says its data is collected from more than 90 local REALTOR® associations and MLSs statewide.
County sales are not seasonally adjusted, unlike the statewide sales rate. And C.A.R. cautions that movements in sales prices should not be read as changes in the cost of a standard home. In practice, the mix of homes that sell shifts from month to month.
| Area | Median price, Sept. 2026 | Median, Sept. 2025 | Price change, year over year | Sales change, year over year |
|---|---|---|---|---|
| Marin County | $1,678,750 | $1,650,000 | Up 1.7% | Up 11.1% |
| Napa County | $918,000 | $900,000 | Up 2.0% | Down 16.0% |
| Sonoma County | $875,000 | $795,000 | Up 10.1% | Down 3.4% |
| San Francisco | $2,054,000 | $1,750,000 | Up 17.4% | Up 6.2% |
| San Mateo County | $2,327,500 | $2,150,000 | Up 8.3% | Down 8.6% |
| Santa Clara County | $1,920,000 | $2,000,000 | Down 4.0% | Up 1.5% |
| California | $899,720 | $884,390 | Up 1.7% | Down 6.5% |
Statewide in September 2026, C.A.R. reported an Unsold Inventory Index of 3.7 months, a median of 29 days to sell, a sale-to-list ratio of 98.8% and a median price of $434 per square foot. The share of million-dollar home sales rose to 35.9% from 35.2% in August. C.A.R. did not publish county-level luxury figures in that release.
Monthly county medians move around. Sonoma’s rose 10.8% from August to September 2026 and Napa’s fell 3.1% over the same month, so treat a single month as one reading, not a trend.
Using the report if you are selling
A market report frames the conversation; it does not price a specific estate. Price comes from the closest comparable sales and the current competition, adjusted for land, views, improvements and condition. Our explanation of a comparative market analysis shows how that work is done, and our home valuation page is the place to start for a specific property.
Signals worth watching: months of inventory rising in your price band means more competition for the same buyers; a falling sale-to-list ratio means buyers are negotiating harder; and a growing gap between average and median prices often means a few large sales are flattering the totals. Our guide to selling a luxury home covers preparation and marketing choices.
Using the report if you are buying
Buyers can use the same measures to judge leverage. Long days on market and a low sale-to-list ratio in a narrow band suggest room to negotiate; short days and ratios near or above 100% suggest the opposite. Check the specific home’s history, including earlier listings and price changes, rather than relying on the averages. Our guide to buying a luxury home covers offers, proof of funds and due diligence.
Estates, vineyards and what a report can’t capture
Wine country estates often combine a residence with acreage, planted vineyard, winery rights or agricultural zoning. A report built on residential sales treats them as houses and can’t separate the value of the land and vines. For those properties, use a valuation built on vineyard and land comparables; our page on vineyard valuation explains the method. County guides to Napa luxury homes, Sonoma luxury homes, Marin luxury homes and San Francisco luxury homes describe where the top-tier properties are and what to check on each. For a countywide view of Sonoma at all price points, see our Sonoma County market report.
This is general market information, not appraisal, financial or tax advice; for a loan, an estate or a tax filing, use a licensed appraiser and talk to your tax adviser about your situation.
Questions people ask
What is the median home price in Napa County?
C.A.R. reported $918,000 for existing single-family homes in September 2026, up 2.0% from $900,000 a year earlier, with sales down 16.0%. That covers all price levels, not only luxury homes.
What counts as a luxury home in Napa, Sonoma or Marin?
There is no official threshold. Reports use either a fixed price, such as $3 million, or a share of local sales, such as the top tenth. Because county medians differ widely, the same price sits at different points in each county, so check what threshold a report uses.
Why do median and average prices differ so much in luxury reports?
The average is pulled up by a few very large sales, while the median is the middle sale. When the average is far above the median, a small number of big sales are shaping the totals.
What does months of inventory mean?
C.A.R.’s Unsold Inventory Index measures the number of months needed to sell the homes on the market at the current sales rate. Statewide it was 3.7 months in September 2026.
How is the sale-to-list ratio calculated?
C.A.R. divides the final sale price by the original list price. Reports that use the last list price instead can make a market look stronger, because they ignore earlier price cuts.
Why doesn’t this report match other luxury reports?
Sources use different geographies, property types, thresholds and time windows, and some include sales outside the MLS. Compare reports only when their methods match.
Is price per square foot a good way to value an estate?
Only as a rough guide. Land, views, vineyards and guest houses add value that square footage doesn’t measure, so estates are priced from comparable sales instead.
If you own a luxury property in Napa, Sonoma, Marin or San Francisco and want to know what the numbers mean for it, contact Diamond for a property-specific review.
Sources & notes
- California Association of REALTORS®: September 2026 home sales and price report (October 19, 2026)
- Federal Housing Finance Agency: Conforming loan limit values
Last reviewed October 2026 by Matthew Martinez.
