21927 Russian River Ave is a 894 square foot house on a 3,200 square foot lot with 2 bedrooms and 1 bathroom. - it last sold on June 30, 2015 for $325,000. Based on Redfin's Monte Rio data, we estimate the home's value is $477,442.
Single-familyProperty Type
1939Year Built
3,200 sq ftLot Size
$534Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$477,442
$152K since sold in June 2015$8,000 since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 44.2% higher than the average sale price ($331K) of 6 comparable homes.
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$256,711
Est. take-home
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$0
Est. cash available
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Rent
$1,800/mo
Redfin rental estimate
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Market trends in Monte Rio, CA
Last updated October 2026
Buyer's Market
Seller's Market
Seller's market
Sale-to-list price
99.0%
+4.6% MoM
Median sale price
$450K
$25K MoM
Avg. days on market
42d
4 days MoM
Recently sold homes
9
5 MoM
Provided by Redfin
Sale history for 21927 Russian River Ave
Date
Event
Price
Public Records
Jun 30, 2015
Sold
$325,000
$364/sq ft
Public Records
Jul 17, 1981
Sold
$48,000
$54/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$4,982 (+2.3%)
$153,230 + $245,174
$398,404
2024
$4,871 (+1.9%)
$150,226 + $240,367
$390,593
2023
$4,780 (+2.0%)
$147,281 + $235,654
$382,935
2022
$4,685 (+1.3%)
$144,394 + $231,034
$375,428
2021
$4,627 (−0.7%)
$141,563 + $226,504
$368,067
2020
$4,660 (+3.0%)
$138,788 + $222,063
$360,851
2019
$4,525 (+8.9%)
$137,365 + $219,787
$357,152
2018
$4,155 (+4.4%)
$134,672 + $215,478
$350,150
2017
$3,979 (+301.5%)
$129,444 + $207,111
$336,555
2015
$991 (+1.4%)
$126,906 + $203,050
$329,956
2014
$977 (+0.3%)
$19,604 + $40,441
$60,045
2013
$975 (+3.6%)
$19,604 + $40,441
$60,045
2012
$941 (+1.4%)
$19,516 + $40,259
$59,775
2011
$928 (+0.7%)
$19,134 + $39,470
$58,604
2010
$921 (−0.4%)
$18,759 + $38,697
$57,456
2009
$925 (−3.9%)
$18,619 + $38,408
$57,027
2007
$962
$18,299 + $37,746
$56,045
Tax history for 21927 Russian River Ave
Year
Property tax
Land + Additions
Assessment*
2025
$4,982 (+2.3%)
$153,230 + $245,174
$398,404
2024
$4,871 (+1.9%)
$150,226 + $240,367
$390,593
2023
$4,780 (+2.0%)
$147,281 + $235,654
$382,935
2022
$4,685 (+1.3%)
$144,394 + $231,034
$375,428
2021
$4,627 (−0.7%)
$141,563 + $226,504
$368,067
2020
$4,660 (+3.0%)
$138,788 + $222,063
$360,851
2019
$4,525 (+8.9%)
$137,365 + $219,787
$357,152
2018
$4,155 (+4.4%)
$134,672 + $215,478
$350,150
2017
$3,979 (+301.5%)
$129,444 + $207,111
$336,555
2015
$991 (+1.4%)
$126,906 + $203,050
$329,956
2014
$977 (+0.3%)
$19,604 + $40,441
$60,045
2013
$975 (+3.6%)
$19,604 + $40,441
$60,045
2012
$941 (+1.4%)
$19,516 + $40,259
$59,775
2011
$928 (+0.7%)
$19,134 + $39,470
$58,604
2010
$921 (−0.4%)
$18,759 + $38,697
$57,456
2009
$925 (−3.9%)
$18,619 + $38,408
$57,027
2007
$962
$18,299 + $37,746
$56,045
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Jun 11, 2016 • Final
Building history record
Work on an addition.
Addition
Jun 11, 2016 • Final
Building history record
Perform an electrical upgrade.
Electrical
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
Basement Information
Basement Sq. Ft: 494
Bathroom Information
# of Full Baths: 1
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 4
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood/Steel
Building Construction Quality: Average
Property Information
Subdivision Name: MESA GRANDE
Living Sq. Ft: 894
Ground Floor Sq. Ft: 894
Building Sq. Ft: 1,230
# of Stories: 1
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 336
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 3,200
Legal Lot Number: 91
Acres: 0.0735
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.0
Sq. Ft.: 894
Stories: 1.0
Lot Size: 3,200 square feet
Style: Single Family Residential
Year Built: 1939
Year Renovated: 1990
County: Sonoma County
APN: 095043003000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
K - 12
Preschool & daycare
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
77
53
82
53
77
55
70
50
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
$454,000 – $550,000
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