SAN FRANCISCO BAY AREA • 9-COUNTY ARCHITECTURAL NETWORK
Official Regional MLS Feed • Oct 30, 2026
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645 William Cunningham Ave
ACTIVE MLS ALLIANCE Single Family Residence
Official MLS Asking Price
$5,195,000.00
Photo 1 of 54

645 William Cunningham Ave

Sonoma, Sonoma • California • MLS #326082579

πŸ›οΈ This listing courtesy of: Mary A Ryan, Engel & Volkers Sonoma (BAREIS MLS #326082579)
MLS ID #326082579
Living Area 4,818.00 Sq Ft
Price / SqFt $1078.25
Bedrooms 5 Beds
Bathrooms 6.0 Baths
Association Fee No HOA ($0)
Stories / Levels 2 Storyies
Lot Area 0.4593 Acres
Market Velocity 31 Days on Market
πŸ”΅ Market Duration Note: This residence has been active for 31 days. Extended duration creates opportunistic contract positioning.

Property Narrative • Architectural Remarks

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.

Architectural Specifications • Key Infrastructure

Property Sub-Type Single Family Residence
Year Built 1998
Subdivision / Enclave Sonoma
Vehicle Parking 3-Car Garage • 24'+ Deep Garage, Detached
Climate Control Cooling: Central Air • Heat: Central, Fireplace(s)
Solar Integration None Reported
Fireplaces 2 Fireplaces
Pool & Spa Private Pool
Second Unit / ADU ADU Detached
Water & Sewer Utilities Water: Public • Sewer: Public Sewer
Assessor Parcel # (APN) 127700026000
Cross Street Charles Van Damme Way
Roofing Not Specified in MLS

Educational Jurisdiction • Assigned School Districts

Elementary School Sonoma Elementary Area
Middle / Junior High Sonoma Middle School Area
High School District Sonoma High School Area
Unified Administrative Jurisdiction: Sonoma Unified School District

Exterior Grounds • Outdoor Living • Environmental Features

Lot & Grounds Attributes
🌿 See Remarks
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System Audit History

  • • Oct 20, 15:09 | PRICE: $5,650,000 → $5,195,000 (SYSTEM_SYNC)
  • • Oct 20, 15:09 | STATUS: Off-Market → Active (SYSTEM_SYNC)
πŸ›οΈ Official MLS Listing Courtesy Originating MLS: BAREIS MLS • #326082579
This listing courtesy of:
Mary A Ryan
🏒 Engel & Volkers Sonoma • Verified MLS Participant
πŸ›‘οΈ BAREIS MLS • Data Disclosure & Licensing Terms
Originating Feed: BAREIS MLS • #326082579
Data Provider: Bay Area Real Estate Information Services, Inc. (BAREIS MLS) • Northern California MLS Alliance

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