21501 Rio Vista Ter is a 634 square foot house on a 4,000 square foot lot with 1 bedroom. Based on Redfin's Monte Rio data, we estimate the home's value is $379,322.
Single-familyProperty Type
1905Year Built
4,000 sq ftLot Size
$598Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$379,322
$17K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 20.3% lower than the average sale price ($476K) of 5 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
$974 (+4.3%)
$11,762 + $17,653
$29,415
2024
$934 (+1.3%)
$11,532 + $17,307
$28,839
2023
$922 (+1.9%)
$11,306 + $16,968
$28,274
2022
$905 (+0.8%)
$11,085 + $16,636
$27,721
2021
$899 (−5.9%)
$10,868 + $16,310
$27,178
2020
$955 (+8.0%)
$10,655 + $15,991
$26,646
2019
$884 (+32.4%)
$10,546 + $15,828
$26,374
2018
$668 (+2.0%)
$10,340 + $15,518
$25,858
2017
$655 (−2.8%)
$9,940 + $14,916
$24,856
2015
$674 (+0.9%)
$9,746 + $14,624
$24,370
2014
$668 (+0.1%)
$9,412 + $14,123
$23,535
2013
$667 (+4.2%)
$9,412 + $14,123
$23,535
2012
$640 (+0.9%)
$9,370 + $14,060
$23,430
2011
$635 (+0.4%)
$9,187 + $13,785
$22,972
2010
$632 (−0.2%)
$9,007 + $13,515
$22,522
2009
$633 (−6.6%)
$8,940 + $13,414
$22,354
2007
$678
$8,787 + $13,183
$21,970
Tax history for 21501 Rio Vista Ter
Year
Property tax
Land + Additions
Assessment*
2025
$974 (+4.3%)
$11,762 + $17,653
$29,415
2024
$934 (+1.3%)
$11,532 + $17,307
$28,839
2023
$922 (+1.9%)
$11,306 + $16,968
$28,274
2022
$905 (+0.8%)
$11,085 + $16,636
$27,721
2021
$899 (−5.9%)
$10,868 + $16,310
$27,178
2020
$955 (+8.0%)
$10,655 + $15,991
$26,646
2019
$884 (+32.4%)
$10,546 + $15,828
$26,374
2018
$668 (+2.0%)
$10,340 + $15,518
$25,858
2017
$655 (−2.8%)
$9,940 + $14,916
$24,856
2015
$674 (+0.9%)
$9,746 + $14,624
$24,370
2014
$668 (+0.1%)
$9,412 + $14,123
$23,535
2013
$667 (+4.2%)
$9,412 + $14,123
$23,535
2012
$640 (+0.9%)
$9,370 + $14,060
$23,430
2011
$635 (+0.4%)
$9,187 + $13,785
$22,972
2010
$632 (−0.2%)
$9,007 + $13,515
$22,522
2009
$633 (−6.6%)
$8,940 + $13,414
$22,354
2007
$678
$8,787 + $13,183
$21,970
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Sep 24, 2018 • Final
Building permit no plan check
Upgrade the electrical service for a single-family home.
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
Room Information
# of Rooms: 2
Exterior
Exterior Information
Building Style Type: Square Design
Construction Type: Wood/Steel
Building Construction Quality: Poor
Property Information
Subdivision Name: MONTE RIO PARK TIER I
Living Sq. Ft: 634
Ground Floor Sq. Ft: 634
Building Sq. Ft: 634
# of Stories: 1
Legal Description: LOT 17
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,000
Legal Lot Number: 17
Acres: 0.0918
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: —
Sq. Ft.: 634
Stories: 1.0
Lot Size: 4,000 square feet
Style: Single Family Residential
Year Built: 1905
Year Renovated: 1966
County: Sonoma County
APN: 095155002000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Places
Transit
Monte Rio Elementary School
Public K-8 • Assigned • 0.5mi
7/10
Analy High School
Public 9-12 • Assigned • 10.8mi
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 86° 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
81
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
$361,000 – $437,000
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