645 William Cunningham Avenue
Sonoma, CA, 95476
$5,650,000
5 Beds
6 Baths
4,818 SqFt
0.46 Acres
This 4-bedroom, 4-bath main residence pairs period character with modern comfort. Craftsman details, timeless proportions, and a warm, livable floor plan carry throughout the approximately 4,818 sq ft main residence. The grounds are just as special. Mature landscaping surrounds the in-ground pool, creating a private setting for afternoons outdoors, entertaining, and relaxed Sonoma living. The 3-car garage includes a convenient shower room, ideal for pool days, gardening, or a quick post-workout rinse. Above the garage, an approximately 825 sq ft carriage house offers a simple, private escape for guests, a home office, or studio. Just five blocks from Sonoma Plaza, the property is close to boutiques, tasting rooms, Michelin-starred and acclaimed restaurants, and the heart of downtown Sonoma. With approximately 4,018 sq ft in the main house plus an additional 825 sq ft carriage house and a total of 6 full bathrooms, this is a rare opportunity to own a remarkable piece of Sonoma’s architectural heritage.
Property Details
Price:
$5,650,000
MLS #:
326082579
Status:
Active
Beds:
5
Baths:
6
Type:
Single Family
Subtype:
Single Family Residence
Neighborhood:
sonoma
Finished Sq Ft:
4,818
Lot Size:
20,007 sqft / 0.46 acres (approx)
Year Built:
1998
Days on Market:
3
List Date:
Sep 29, 2026
Interior
Bathrooms
6 Full Bathrooms
Cooling
Central Air
Fireplaces Total
2
Heating
Central, Fireplace(s)
Laundry Features
Inside Room
Levels
Two
Exterior
Garage Spaces
3
Lot Features
See Remarks
Parking Features
24’+ Deep Garage, Detached
Parking Spots
3
Parking Total
3
Stories
2
Financial
Map
All map details are google-generated and can contain errors. Lot lines and building locations are fuzzy. See Official plat maps for more accurate information.
Community
- Address645 William Cunningham Avenue Sonoma CA
- CitySonoma
- CountySonoma
- Zip Code95476
Subdivisions in Sonoma
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Copyright 2026, Bay Area Real Estate Information Services, Inc. All Rights Reserved. Listing courtesy of Mary A Ryan at Engel & Volkers Sonoma
645 William Cunningham Avenue
Sonoma, CA


