645 Broadway, Sonoma, CA 95476
Two mixed-use buildings in Sonoma with value-add potential.
- Added:
- Apr 3, 2026
- Days on Market:
- 67
- Last Refresh:
- Apr 3 at 5:24 am
Property Features for 645 Broadway
General Information
- Standard status
- Active
- Size
- 14,746 SF
- Property subtype
- Office
Building Details
- Year Built
- 1928
Listing agent Quentin Caruso License #CA: 02074286 (415) 625-2180
Listing office San Francisco Office (415) 625-2180
Listing date Apr 3, 2026
Source Marcusmillichap
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HighLights
- Mixed‑use asset with upside potential through lease‑up and effective management.
- Two buildings on a single parcel in a high‑traffic location in Sonoma, CA.
- Opportunity to create two separate parcels via lot line adjustment for individual sale.
- 10 Maple Street (built 2007): Modern office building with solar panels, ADA‑compliant elevator, and high‑end finishes.
- 641‑651 Broadway Street (built 1928): Historically significant building with Wine Country charm and a park‑like setting.
- Ample parking with 39 on‑site spaces plus on‑street parking.
Overview
Local Financial Insights For Office B
Simulate Cap Rate and NOI
NOI Build-Up
- Vacancy
- income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
- EGI (Effective Gross Income)
- gross rent minus vacancy losses — the realistic income before paying operating costs.
- OpEx (Operating Expenses)
- recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
- NOI (Net Operating Income)
- income a property generates after operating costs but before financing and taxes.
| Component | $ | $/SF |
|---|---|---|
| Gross rent | $327.4k | $22.20 |
| − Vacancy | −$49.8k | −$3.37 |
| EGI | $277.6k | $18.83 |
| − OpEx | −$69.4k | −$4.71 |
| NOI | $208.2k | $14.12 |
Alternative Uses
Current Use by Public Records
Location Insight
- Map
- Local Demand
- City
- Sonoma
- County
- Sonoma
- State
- California
- Longitude
- -122.4587255
- Latitude
- 38.2893864