21920 Willow Way is a 487 square foot house on a 3,936 square foot lot with 2 bedrooms and 1.5 bathrooms. Based on Redfin's Monte Rio data, we estimate the home's value is $383,016.
Single-familyProperty Type
1910Year Built
3,936 sq ftLot Size
$786Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$383,016
$19K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.7% lower than the average sale price ($424K) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$796 (+4.9%)
$8,219 + $4,736
$12,955
2024
$759 (+1.2%)
$8,058 + $4,644
$12,702
2023
$750 (+1.8%)
$7,900 + $4,553
$12,453
2022
$737 (+0.6%)
$7,746 + $4,464
$12,210
2021
$732 (−7.3%)
$7,595 + $4,377
$11,972
2020
$790 (+9.4%)
$7,447 + $4,292
$11,739
2019
$722 (+40.9%)
$7,371 + $4,248
$11,619
2018
$513 (+1.1%)
$7,227 + $4,165
$11,392
2017
$507 (−5.1%)
$6,948 + $4,004
$10,952
2015
$534 (+0.6%)
$6,812 + $3,926
$10,738
2014
$531 (+0.2%)
$6,579 + $3,793
$10,372
2013
$530 (+4.9%)
$6,579 + $3,793
$10,372
2012
$505 (+0.5%)
$6,550 + $3,776
$10,326
2011
$502 (+0.2%)
$6,422 + $3,702
$10,124
2010
$501 (−0.1%)
$6,297 + $3,630
$9,927
2009
$502 (−8.6%)
$6,250 + $3,603
$9,853
2007
$549
$6,143 + $3,542
$9,685
Tax history for 21920 Willow Way
Year
Property tax
Land + Additions
Assessment*
2025
$796 (+4.9%)
$8,219 + $4,736
$12,955
2024
$759 (+1.2%)
$8,058 + $4,644
$12,702
2023
$750 (+1.8%)
$7,900 + $4,553
$12,453
2022
$737 (+0.6%)
$7,746 + $4,464
$12,210
2021
$732 (−7.3%)
$7,595 + $4,377
$11,972
2020
$790 (+9.4%)
$7,447 + $4,292
$11,739
2019
$722 (+40.9%)
$7,371 + $4,248
$11,619
2018
$513 (+1.1%)
$7,227 + $4,165
$11,392
2017
$507 (−5.1%)
$6,948 + $4,004
$10,952
2015
$534 (+0.6%)
$6,812 + $3,926
$10,738
2014
$531 (+0.2%)
$6,579 + $3,793
$10,372
2013
$530 (+4.9%)
$6,579 + $3,793
$10,372
2012
$505 (+0.5%)
$6,550 + $3,776
$10,326
2011
$502 (+0.2%)
$6,422 + $3,702
$10,124
2010
$501 (−0.1%)
$6,297 + $3,630
$9,927
2009
$502 (−8.6%)
$6,250 + $3,603
$9,853
2007
$549
$6,143 + $3,542
$9,685
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Jun 26, 2017 • Final
Building permit no plan check
Legalize the electrical wiring in a shed. The work includes installing a subpanel, outlets, and an exterior light fixture.
Electrical
Jun 11, 2016 • Final
Building permit with plan check
Replace the existing foundation of a single-family home.
Remodel
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
# of 1/2 Baths: 1
Room Information
# of Rooms: 3
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood/Steel
Building Construction Quality: Poor
Property Information
Subdivision Name: MESA GRANDE
Living Sq. Ft: 487
Ground Floor Sq. Ft: 487
Building Sq. Ft: 487
# of Stories: 1
Legal Description: LOT 103 MESA GRANDE
Lot Information
# of Buildings: 1
Land Sq. Ft: 3,936
Legal Lot Number: 103
Acres: 0.0904
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.5
Sq. Ft.: 487
Stories: 1.0
Lot Size: 3,936 square feet
Style: Single Family Residential
Year Built: 1910
Year Renovated: 1918
County: Sonoma County
APN: 095042006000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Monte Rio Elementary School
Public K-8 • Assigned • 0.6mi
7/10
Analy High School
Public 9-12 • Assigned • 11.6mi
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
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
2/10 Heat Factor
8 days above 84° expected this year, 22 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
60
43
69
44
66
46
74
49
75
51
73
52
82
53
78
53
75
49
62
45
58
44
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
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
$364,000 – $441,000
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