21921 Russian River Ave is a 720 square foot house on a 3,200 square foot lot with 2 bedrooms and 1 bathroom. Based on Redfin's Monte Rio data, we estimate the home's value is $378,382.
Single-familyProperty Type
1909Year Built
3,200 sq ftLot Size
$526Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$378,382
$3,000 since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 6.1% lower than the average sale price ($403K) of 6 comparable homes.
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Earn from this home
Sell
$356,349
Est. take-home
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Rent
$1,687/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 21921 Russian River Ave
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$995 (+4.4%)
$8,219 + $30,232
$38,451
2024
$953 (+1.5%)
$8,058 + $29,640
$37,698
2023
$939 (+2.0%)
$7,900 + $29,059
$36,959
2022
$920 (+0.9%)
$7,746 + $28,490
$36,236
2021
$912 (−5.7%)
$7,595 + $27,932
$35,527
2020
$967 (+8.1%)
$7,447 + $27,385
$34,832
2019
$895 (+32.2%)
$7,371 + $27,105
$34,476
2018
$677 (+2.2%)
$7,227 + $26,574
$33,801
2017
$662 (−2.4%)
$6,948 + $25,543
$32,491
2015
$678 (+1.0%)
$6,812 + $25,043
$31,855
2014
$671 (+0.3%)
$6,579 + $24,184
$30,763
2013
$669 (+4.5%)
$6,579 + $24,184
$30,763
2012
$641 (+1.1%)
$6,550 + $24,075
$30,625
2011
$634 (+0.5%)
$6,422 + $23,603
$30,025
2010
$631 (−0.3%)
$6,297 + $23,141
$29,438
2009
$632 (−6.4%)
$6,250 + $22,969
$29,219
2007
$675
$6,143 + $22,573
$28,716
Tax history for 21921 Russian River Ave
Year
Property tax
Land + Additions
Assessment*
2025
$995 (+4.4%)
$8,219 + $30,232
$38,451
2024
$953 (+1.5%)
$8,058 + $29,640
$37,698
2023
$939 (+2.0%)
$7,900 + $29,059
$36,959
2022
$920 (+0.9%)
$7,746 + $28,490
$36,236
2021
$912 (−5.7%)
$7,595 + $27,932
$35,527
2020
$967 (+8.1%)
$7,447 + $27,385
$34,832
2019
$895 (+32.2%)
$7,371 + $27,105
$34,476
2018
$677 (+2.2%)
$7,227 + $26,574
$33,801
2017
$662 (−2.4%)
$6,948 + $25,543
$32,491
2015
$678 (+1.0%)
$6,812 + $25,043
$31,855
2014
$671 (+0.3%)
$6,579 + $24,184
$30,763
2013
$669 (+4.5%)
$6,579 + $24,184
$30,763
2012
$641 (+1.1%)
$6,550 + $24,075
$30,625
2011
$634 (+0.5%)
$6,422 + $23,603
$30,025
2010
$631 (−0.3%)
$6,297 + $23,141
$29,438
2009
$632 (−6.4%)
$6,250 + $22,969
$29,219
2007
$675
$6,143 + $22,573
$28,716
*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
Remodel 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
Room Information
# of Rooms: 3
Exterior
Exterior Information
Building Style Type: U-Shape
Construction Type: Wood/Steel
Building Construction Quality: Fair
Property Information
Subdivision Name: MESA GRANDE
Living Sq. Ft: 720
Building Sq. Ft: 720
# of Stories: 1
Lot Information
# of Buildings: 1
Land Sq. Ft: 3,200
Legal Lot Number: 88
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.: 720
Stories: 1.0
Lot Size: 3,200 square feet
Style: Single Family Residential
Year Built: 1909
Year Renovated: 1909
County: Sonoma County
APN: 095043005000
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 • 11.7mi
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, 23 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
$360,000 – $436,000
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