Markets We Serve
Commercial Real Estate Across the North Bay
W Commercial covers Sonoma, Marin and Napa counties from our Santa Rosa office. Our market data and quarterly reports are produced by county — choose one for the current indicators, the reports behind them, and how we read each submarket.
Where we work
-
North Bay · CA Sonoma County 6.0% Vacancy Rate 5.5% Q2 Average Cap Rate $2,273 Average Asking Rent / Unit Explore the market → -
North Bay · CA Marin County 4.2% Vacancy Rate 5.5% Q2 Average Cap Rate $2,986 Average Asking Rent / Unit Explore the market → -
North Bay · CA Napa County 9.1% Vacancy Rate 4.5% Q2 Average Cap Rate $2,546 Average Asking Rent / Unit Explore the market →
At a Glance
The Three Counties, Side by Side
Multifamily fundamentals and Q2 2026 sales activity for the three North Bay market areas. Source: CoStar, as of 2026-07-17. Multifamily is the asset class we track quarterly at county level — it is not a guide to industrial, office or retail pricing.
| Indicator | Sonoma CountySanta Rosa — CA USA | Marin CountySan Rafael — CA USA | Napa CountyNapa — CA USA |
|---|---|---|---|
| Multifamily inventoryunits, 5+ unit properties | 25,248 | 16,063 | 6,848 |
| Vacancy rate | 6.0% | 4.2% | 9.1% |
| Market asking rentper unit / month | $2,273 | $2,986 | $2,546 |
| Market sale priceper unit | $313K | $445K | $328K |
| Market cap rate | 5.5% | 4.7% | 5.5% |
| Under constructionunits | 511 | 120 | 0 |
| Q2 2026 sales volume | $19.4M | $39.9M | $1.7M |
| Q2 2026 properties sold | 8 | 12 | 1 |
Figures cover multifamily properties of five units or more and are market-area level, not city level. Verify independently before relying on any figure in a transaction.
How We Read the Region
One Region, Three Different Markets
The North Bay runs on US-101. The corridor enters at the Golden Gate, climbs through Marin's constrained office and flex markets in San Rafael and Novato, crosses into Sonoma County at Petaluma, and carries the region's commercial weight through Rohnert Park, Santa Rosa, Windsor and Healdsburg before thinning out toward Cloverdale and the Mendocino line. Highway 12 and Highway 121 branch east into the Sonoma Valley and on to Napa, where the valley economy is hospitality up-valley and industrial in the south county around American Canyon and its I-80 connection.
Sonoma County is where most requirements start, because it is the only North Bay market with real inventory depth across industrial, flex, office, retail and multifamily. Marin County is the premium: decades of growth controls mean commercial stock turns over rather than expands, and the strategic question is usually whether a Marin address is worth it or whether Novato or Petaluma serves the same operation better. Napa County is smaller and more specialised — a wine-and-visitor economy with tightly held downtown cores, plus a working industrial base that looks toward Solano County and the East Bay as much as it does toward Sonoma.
We work all three from Santa Rosa, which puts most of the region inside an hour. The practical benefit for clients is comparison: a tenant weighing San Rafael against Petaluma, or an investor comparing a Napa cap rate with a Sonoma one, is talking to the same two brokers about both sides of the line. Our quarterly reports are built county by county for the same reason — the region only makes sense read together.
Interactive
Compare the Counties
Select a county to isolate it, or switch tabs for Q2 2026 closed sales and new listings. Every figure is sourced in the caption beneath.
Market Reports
Latest North Bay Research
July 2026 Sonoma County Multifamily Snapshot — Q2 2026 Eight Sonoma County multifamily properties traded in Q2 2026 — 127 units for $19.4M at a 5.5% average cap rate. Sellers are now pricing new listings 45 basis points wider than the quarter's closings, pointing to a heavier Q3–Q4 calendar. 
January 2026 Sonoma County Industrial Sales Snapshot — Q4 2025 Sonoma County's industrial sales market continued to reset in Q4 2025 — pricing stabilizing, cap rates normalizing, and buyers underwriting with greater discipline. Well-located, functional assets still attract strong owner-user and investor demand. 
January 2026 Sonoma County Multifamily Snapshot — Q4 2025 Q4 2025 marked a clear shift toward stabilization in Sonoma County's multifamily market — 11 properties traded for $68.1M at a 5.70% average cap rate. Pricing, yields, and activity are normalizing as buyers prioritize fundamentals. 
January 2026 Case Study: El Milagro — Healdsburg Expansion How W Real Estate sourced an off-market Healdsburg Plaza space for El Milagro — verifying restaurant-use feasibility, assembling a compelling offer, and negotiating favorable lease terms that led to a second, larger location. Submarkets
Every Market We Work, by County
Each submarket has its own product mix, corridors and tenant base. The one-line read below opens into a fuller section on the county page.
Sonoma County
- Santa Rosa
Santa Rosa is the largest city in Sonoma County and the commercial hub of the North Bay — and the deepest, most liquid commercial market between San Francisco and the Oregon border.
- Petaluma
Petaluma anchors southern Sonoma County and is the county's closest commercial market to San Francisco and the greater Bay Area.
- Rohnert Park
Rohnert Park sits at the center of Sonoma County's US-101 spine, between Santa Rosa and Petaluma, with a planned street grid that produced unusually consistent commercial parcels.
- Healdsburg
Healdsburg is northern Sonoma County's hospitality and wine-country destination, with a small, tightly held commercial core built around its downtown Plaza.
- Windsor
Windsor sits between Santa Rosa and Healdsburg on US-101, with a planned town green core and newer commercial development along its highway frontage.
- Sebastopol
Sebastopol is west Sonoma County's commercial center, built around the Highway 116 and Highway 12 junction and a distinctive independent-business core.
- Sonoma
The City of Sonoma anchors the Sonoma Valley, with a commercial core built around the historic Sonoma Plaza and a wine-and-hospitality economy driving most tenant demand.
- Cotati
Cotati is a small central Sonoma County city at the junction of US-101 and Highway 116, with a compact commercial core and direct SMART rail access.
- Cloverdale
Cloverdale is northern Sonoma County's last city on US-101, serving as the commercial gateway between the county and Mendocino County.
Marin County
- Novato
Novato is northern Marin County's largest commercial market and the practical bridge between Marin and Sonoma County along US-101.
- San Rafael
San Rafael is the county seat and commercial center of Marin, carrying the county's largest concentration of office space and its most active downtown.
Common Questions
North Bay Commercial Real Estate FAQ
What counties make up the North Bay commercial real estate market?
The North Bay is Sonoma, Marin and Napa counties — the part of the San Francisco Bay Area north of the Golden Gate. W Commercial covers all three from its Santa Rosa office. Sonoma County carries the deepest commercial inventory, Marin the most supply-constrained and highest-priced, and Napa a wine-and-hospitality economy up-valley with an industrial base in the south county.
Which North Bay county has the most commercial property available?
Sonoma County, by a wide margin. Santa Rosa is the regional employment center and the US-101 corridor cities — Petaluma, Rohnert Park, Windsor, Healdsburg — each add industrial, flex, office and retail product. Marin's inventory turns over rather than expands because of long-standing growth controls, and Napa's commercial stock is concentrated in the city of Napa and American Canyon.
How do Marin County commercial rents compare with Sonoma County?
Marin prices at a premium across most asset classes because supply is constrained. Many requirements end up comparing a Marin address against Novato at the county's northern edge or Petaluma just across the Sonoma line, which is why we work both sides of that boundary. Our quarterly county comparison on this page shows the current multifamily spread; call 707-591-0570 for industrial, office or retail comparables.
Where does W Commercial's North Bay market data come from?
Our quarterly reports are built from CoStar market summaries and transaction records, checked against our own deal flow. Figures are published at the county market-area level, labelled by asset class and period, and should be independently verified before use in a transaction.
Does W Commercial handle properties outside Santa Rosa?
Yes. Stephen Skinner and Cooper Fox work every Sonoma County submarket, the US-101 corridor in Marin (principally Novato and San Rafael), and Napa County. Most of the North Bay is within an hour of the Santa Rosa office, and the brokers are in these buildings weekly rather than quarterly.
Work With Us
Need a read on a specific building or requirement?
County-level indicators frame the market; the answer for your property comes from current comparables and the deals we are working now. Ask for a market briefing or a broker's opinion of value — both are free and carry no obligation.