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$5,195,000
23 Days On Site

645 William Cunningham Avenue
Sonoma, CA 95476

For Sale|Single Family Residence|Active
5
Beds
6
Total Baths
6
Full Baths
4,818
SqFt
$1,078
/SqFt
1998
Built
County:
Sonoma
Listing courtesy of Mary A Ryan of Engel & Volkers Sonoma
645 William Cunningham Avenue645 William Cunningham Avenue645 William Cunningham Avenue645 William Cunningham Avenue
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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.

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Listing Snapshot
Price 
$5,195,000
Days On Site 
23 Days
Bedrooms 
5
Inside Area (SqFt) 
4,818 sqft
Total Baths 
6
Full Baths 
6
Partial Baths 
N/A
Lot Size 
0.4593 Acres
Year Built 
1998
MLS Number 
326082579
Status 
Active
Property Tax 
N/A
HOA/Condo/Coop Fees 
N/A
Sq Ft Source 
N/A
Friends & Family
Recent Activity
7 days agoListing updated with changes from the MLS
a week agoPrice changed to $5,195,000
3 weeks agoListing first seen on site
General Features
Acres 
0.4593
Cross Street 
Charles Van Damme Way
Garage 
Yes
Garage Spaces 
3
Land Lease 
No
Levels 
Two
Parking 
Detached
Parking Spaces 
3
Property Sub Type 
Single Family Residence
Sewer 
Public Sewer
Special Circumstances 
Standard
Water Source 
Public
Interior Features
Basement 
None
Cooling 
Central Air
Fireplace 
Yes
Fireplace Features 
Gas LogGas StarterStone
Fireplaces 
2
Heating 
CentralFireplace(s)
Laundry Features 
Inside
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Exterior Features
Lot Features 
See Remarks
Pool Features 
Solar HeatPrivate
Private Pool 
Yes
Community Features
MLS Area 
Sonoma
Listing courtesy of Mary A Ryan of Engel & Volkers Sonoma



Listing information is provided by Participants of the Bay Area Real Estate Information Services, Inc. MLS. IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed. Copyright 2026, Bay Area Real Estate Information Services, Inc. MLS.
Last checked: 2026-10-22 12:56 AM UTC

Neighborhood & Commute
Source: Walkscore
Disclosure: Community information and market data powered by Constellation Data Labs. Information is deemed reliable but not guaranteed.
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