639 Duer Rd is a 2,040 square foot house on a 4 acre lot with 3 bedrooms and 2 bathrooms. - it last sold on August 05, 1994 for $280,000. Based on Redfin's Sebastopol data, we estimate the home's value is $1,340,070.
Single-familyProperty Type
1980Year Built
4 acresLot Size
$657Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,340,070
$1.1M since sold in August 1994$5,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 22.8% higher than the average sale price ($1.09M) of 4 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
May 18, 2026 • Final
Building permit with plan check
Addition
Demolition
Remodel
Mar 28, 2023 • Final
Demolition
Demolition
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Bathroom Information
# of Full Baths: 2
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 7
Exterior
Exterior Information
Construction Type: Wood/Steel
Building Construction Quality: Good
Property Information
Subdivision Name: KELLY RANCH
Living Sq. Ft: 2,040
Ground Floor Sq. Ft: 1,459
Building Sq. Ft: 2,040
# of Stories: 2
Legal Description: LOT 5
Parking & Garage Information
Parking Type: Detached Garage
Garage/Parking Sq. Ft: 1,120
Garage / Carport Type: Detached
Lot Information
# of Buildings: 1
Land Sq. Ft: 174,240
Legal Lot Number: 5
Acres: 4
Zoning Code: RR3
County Use Description: RURAL RESID-1 RESID
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 2,040
Stories: 2.0
Lot Size: 4 acres
Style: Single Family Residential
Year Built: 1980
Year Renovated: 1980
County: Sonoma County
APN: 060020037000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Park Side Elementary School
Public K-4 • Assigned • 1.9mi
9/10
Brook Haven Elementary School
Public 5-8 • Assigned • 2.2mi
5/10
Analy High School
Public 9-12 • Assigned • 1.5mi
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
0.46% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 90° expected this year, 16 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
62
43
69
45
66
46
73
49
76
51
74
52
82
53
79
53
76
50
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
$1.27M – $1.54M
Reach more buyers when you sell with Redfin. Save up to $13,401 in fees.3 minutes to get started.