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5 Beds
6 Baths
4,818 sqft

$5,650,000

645 William Cunningham Avenue, Sonoma CA, 95476

Price per sqft$1,172.69
Built in1998
Property size4,818 sqft
Property typeResidential

Overview

Active

Listed Sep 29, 2026

Updated 7h ago

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.

$37,590/mo

Est. mortgage payment based on a $5,650,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
326082579

Interior Features

Bedrooms
5
Bathrooms
6
Fireplace
Yes
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
0.46 Acres

Other Property Details

Garage
Yes
Pool
Yes
55+/Senior Community
No

Listed by Mary A Ryan (02031683) with Engel & Volkers Sonoma

Listing Contact:  

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