About This Home

This 5-bedroom, 6-bathroom single family at 645 William Cunningham Avenue in Sonoma, CA is listed for $5,650,000 ($1,173 per sqft). Built in 1998, the home offers 4,818 sqft of living space on a N/A lot.

Key Features

  • Built in 1998

Property Details

6 full
1998
Listing Description

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.

Monthly Cost Estimate

$30,217/mo

20% down · 6.5% · 30 years

Principal$4,086
Interest$24,483
Insurance$1,648

Estimates only. Actual payments may vary.

Location

645 William Cunningham Avenue

Sonoma, CA 95476

Questions & Answers

This 5-bedroom, 6-bathroom single family at 645 William Cunningham Avenue is listed at $5,650,000 ($1,173/sqft). The estimated monthly payment is $30,217 based on 20% down, a 30-year loan at 6.5% interest, estimated insurance.

Key features include: Built in 1998.

This property is listed by Mary A Ryan.

MR

Mary A Ryan

Agent at Engel & Volkers Sonoma

Listed by Engel & Volkers Sonoma · Broker phone: 7077083087 · Broker website

MLS# 326082579· Source: Engel & Völkers· 10 days on PropertySimple

Copyright © 2026 Engel & Völkers. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

645 William Cunningham Avenue, Sonoma, CA 95476

Open this listing in: