For Sale

$5,195,000

645 William Cunningham Avenue
Sonoma, CA 95476

5 Beds
6 Baths
4,818 Sq Ft

MLS # 247571859

About This Home

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.

Payment snapshot

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Estimated monthly payment$34,464Principal, interest, estimated taxes, and insurance
Loan amount $4,675,500Principal and interest $29,552Estimated taxes $4,762Estimated insurance $150

Illustration only. This is not a loan estimate, approval, or commitment to lend. Rates and costs can change.

Listing information

Listing agent: Mary Ryan. Listing brokerage: Engel & Volkers Sonoma. MLS ID 247571859.

Source: BAREIS MLS®. Data last updated 10/22/2026, 10:52:26 AM.

Information is deemed reliable but not guaranteed and should be independently verified.

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