21379 Monte Cristo Ave is a 1,708 square foot house on a 0.27 acre lot with 3 bedrooms and 2 bathrooms. Based on Redfin's Monte Rio data, we estimate the home's value is $639,470.
Single-familyProperty Type
1930Year Built
0.27 acresLot Size
$374Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$639,470
$28K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.7% higher than the average sale price ($583K) 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
$2,295 (+2.8%)
$56,606 + $94,369
$150,975
2024
$2,231 (+1.7%)
$55,497 + $92,519
$148,016
2023
$2,193 (+2.0%)
$54,409 + $90,705
$145,114
2022
$2,151 (+1.1%)
$53,343 + $88,927
$142,270
2021
$2,127 (−2.2%)
$52,298 + $87,184
$139,482
2020
$2,175 (+4.4%)
$51,273 + $85,475
$136,748
2019
$2,084 (+14.7%)
$50,748 + $84,599
$135,347
2018
$1,817 (+3.8%)
$49,753 + $82,941
$132,694
2017
$1,750 (+2.2%)
$47,822 + $79,721
$127,543
2015
$1,713 (+1.7%)
$46,885 + $78,158
$125,043
2014
$1,685 (+0.3%)
$45,277 + $75,476
$120,753
2013
$1,681 (+2.7%)
$45,277 + $75,476
$120,753
2012
$1,636 (+1.6%)
$45,073 + $75,135
$120,208
2011
$1,610 (+0.9%)
$44,190 + $73,662
$117,852
2010
$1,597 (−0.5%)
$43,324 + $72,218
$115,542
2009
$1,604 (−1.6%)
$43,001 + $71,679
$114,680
2007
$1,630
$42,259 + $70,442
$112,701
Tax history for 21379 Monte Cristo Ave
Year
Property tax
Land + Additions
Assessment*
2025
$2,295 (+2.8%)
$56,606 + $94,369
$150,975
2024
$2,231 (+1.7%)
$55,497 + $92,519
$148,016
2023
$2,193 (+2.0%)
$54,409 + $90,705
$145,114
2022
$2,151 (+1.1%)
$53,343 + $88,927
$142,270
2021
$2,127 (−2.2%)
$52,298 + $87,184
$139,482
2020
$2,175 (+4.4%)
$51,273 + $85,475
$136,748
2019
$2,084 (+14.7%)
$50,748 + $84,599
$135,347
2018
$1,817 (+3.8%)
$49,753 + $82,941
$132,694
2017
$1,750 (+2.2%)
$47,822 + $79,721
$127,543
2015
$1,713 (+1.7%)
$46,885 + $78,158
$125,043
2014
$1,685 (+0.3%)
$45,277 + $75,476
$120,753
2013
$1,681 (+2.7%)
$45,277 + $75,476
$120,753
2012
$1,636 (+1.6%)
$45,073 + $75,135
$120,208
2011
$1,610 (+0.9%)
$44,190 + $73,662
$117,852
2010
$1,597 (−0.5%)
$43,324 + $72,218
$115,542
2009
$1,604 (−1.6%)
$43,001 + $71,679
$114,680
2007
$1,630
$42,259 + $70,442
$112,701
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Dec 30, 2024 • Active
Building permit no plan check
Plumbing
Water heater
Jun 11, 2016 • Final
Building history record
Reroof a garage.
Roofing
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: 539
Bathroom Information
# of Full Baths: 2
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: Fair
Property Information
Subdivision Name: MONTE CRISTO 02
Living Sq. Ft: 1,708
Ground Floor Sq. Ft: 1,708
Building Sq. Ft: 1,888
# of Stories: 1
Parking & Garage Information
Parking Type: Detached Garage
Garage/Parking Sq. Ft: 400
Garage / Carport Type: Detached
Lot Information
# of Buildings: 1
Land Sq. Ft: 11,600
Legal Lot Number: 7-9
Acres: 0.2663
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,708
Stories: 1.0
Lot Size: 0.27 acres
Style: Single Family Residential
Year Built: 1930
Year Renovated: 1949
County: Sonoma County
APN: 094061002000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Monte Rio Elementary School
Public K-8 • Assigned • 0.5mi
7/10
Analy High School
Public 9-12 • Assigned • 11.5mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
4/10 Flood Factor
Estimated 11-17% 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
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
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
$608,000 – $736,000
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