20171 Willow Rd is a 936 square foot house on a 9,500 square foot lot with 3 bedrooms and 1 bathroom. - it last sold on January 31, 2020 for $395,000. Based on Redfin's Monte Rio data, we estimate the home's value is $612,534.
Single-familyProperty Type
1955Year Built
9,500 sq ftLot Size
$654Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$612,534
$218K since sold in January 2020$66K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 43% higher than the average sale price ($428K) 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.
Permits
Dec 3, 2025 • Final
Building permit with plan check
Battery
Electrical
Solar
May 13, 2020 • Final
Building permit no plan check
Electrical
Generator
Plumbing
Water heater
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: 1
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 4
Exterior
Exterior Information
Building Style Type: Square Design
Construction Type: Wood/Steel
Building Construction Quality: Fair
Property Information
Subdivision Name: STARRETT 51
Living Sq. Ft: 936
Ground Floor Sq. Ft: 936
Building Sq. Ft: 936
# of Stories: 1
Parking & Garage Information
Garage/Parking Sq. Ft: 384
Lot Information
# of Buildings: 1
Land Sq. Ft: 9,500
Legal Lot Number: 18
Acres: 0.2181
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 936
Stories: 1.0
Lot Size: 9,500 square feet
Style: Single Family Residential
Year Built: 1955
Year Renovated: 1955
County: Sonoma County
APN: 095244003000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Monte Rio Elementary School
Public K-8 • Assigned • 0.7mi
7/10
Analy High School
Public 9-12 • Assigned • 10.5mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
9/10 Flood Factor
Estimated 75-83% chance 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
2/10 Heat Factor
9 days above 86° expected this year, 24 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
17 unhealthy days expected this year, 19 days in 30 years
Provided by First Street
Historical weather
Monte Rio, CA • 95462
Average low and high temperatures (°F)
59
40
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43
69
44
66
46
74
49
75
51
73
52
81
53
78
53
75
49
62
45
58
44
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
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Dec
Sun exposure
In this area, properties receive around 10.6 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
10.6 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$582,000 – $705,000
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