20575 Monte Rio Ave is a 432 square foot house on a 4,400 square foot lot with 1 bedroom and 1 bathroom. - it last sold on October 04, 2024 for $130,000. Based on Redfin's Monte Rio data, we estimate the home's value is $355,684.
Single-familyProperty Type
1954Year Built
4,400 sq ftLot Size
$823Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$355,684
$226K since sold in October 2024$10K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 17.3% lower than the average sale price ($430K) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Dec 8, 2025 • Final
Building permit with plan check
Remodel
Jun 11, 2016 • Final
Building history record
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
Bathroom Information
# of Full Baths: 1
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: EAST MONTE RIO
Living Sq. Ft: 432
Ground Floor Sq. Ft: 432
Building Sq. Ft: 432
# of Stories: 1
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,400
Legal Lot Number: 23
Acres: 0.101
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: 1.0
Sq. Ft.: 432
Stories: 1.0
Parking Spaces: —
Basement: No
Accessible: No
Lot Size: 4,400 square feet
Style: Single Family Residential
Year Built: 1954
Year Renovated: 1966
County: Sonoma County
APN: 095200006000
HOA Dues: —
Garage: —
Features: —
Home facts updated by owner on Jan 25, 2026
Around this home
Schools
Places
Transit
Monte Rio Elementary School
Public K-8 • Assigned • 0.6mi
7/10
Analy High School
Public 9-12 • Assigned • 10.4mi
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
2/10 Fire Factor
0.00% chance of being 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
$338,000 – $410,000
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