640 S Main St is a 2,610 square foot multi-family home on a 0.27 acre lot with 4 bedrooms and 3 bathrooms. - it last sold on January 20, 2017 for $458,000. Based on Redfin's Sebastopol data, we estimate the home's value is $935,360.
Multi-familyProperty Type
1930Year Built
0.27 acresLot Size
$358Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$935,360
$477K since sold in January 2017$26K since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 5.2% higher than the average sale price ($889K) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
CO
Office Commercial District
The CO District is intended to create, preserve, and enhance areas containing a mixture of professional, medical, administrative, and general offices, residential, and small-scale retail uses and to encourage mixed-use developments of commercial and residential uses. This district is typically appropriate along major thoroughfares and adjacent to residential neighborhoods.
Permitted uses
Include but are not limited to:
Garden center
General retail
Restaurant
Housing-Group
Office
Educational/school
Park & open space
Property details
Interior
Bathroom Information
# of Full Baths: 3
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 8
Exterior
Exterior Information
Building Style Type: U-Shape
Construction Type: Wood/Steel
Building Construction Quality: Average
Property Information
Subdivision Name: CALDER ADD/SEBASTOPOL
Living Sq. Ft: 2,610
Building Sq. Ft: 2,610
# of Stories: 2
Parking & Garage Information
Parking Type: Detached Garage
Garage/Parking Sq. Ft: 740
Garage / Carport Type: Detached
Lot Information
# of Buildings: 1
Land Sq. Ft: 11,935
Legal Lot Number: 3
Legal Block Number: 3
Acres: 0.274
Zoning Code: CITYSE
County Use Description: TRIPLEX
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 2,610
Stories: 2.0
Lot Size: 0.27 acres
Style: Multi-Family (2-4 Unit)
Year Built: 1930
Year Renovated: 1930
County: Sonoma County
APN: 004093007000
Home facts updated by county records on Oct 28, 2026
Around this home
Schools
K - 12
Preschool & daycare
Park Side Elementary School
Public K-4 • Assigned • 0.5mi
9/10
Brook Haven Elementary School
Public 5-8 • Assigned • 0.9mi
5/10
Analy High School
Public 9-12 • Assigned • 0.8mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
3/10 Fire Factor
0.15% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 90° expected this year, 17 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
19 unhealthy days expected this year, 19 days in 30 years
Provided by First Street
Historical weather
Sebastopol, CA • 95472
Average low and high temperatures (°F)
61
41
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43
69
45
66
46
73
49
76
51
77
52
82
53
79
55
71
51
63
46
57
44
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 11.1 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.1 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$889,000 – $1.08M
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