20290 Alder Rd is a 672 square foot house on a 6,818 square foot lot with 2 bedrooms and 1 bathroom. - it last sold on September 04, 2003 for $282,000. Based on Redfin's Monte Rio data, we estimate the home's value is $517,582.
Single-familyProperty Type
1943Year Built
6,818 sq ftLot Size
$770Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$517,582
$236K since sold in September 2003$18K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 14.8% higher than the average sale price ($451K) 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
Jun 11, 2016 • Final
Building history record
Elevate the structure above the flood level.
Grading
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
Bathroom Information
# of Full Baths: 1
Heating & Cooling
Heating Fuel Type: Electric
Heating Type: Wall Furnace
Room Information
# of Rooms: 3
Exterior
Exterior Information
Physical Condition: Average
Building Style Type: Square Design
Construction Type: Wood/Steel
Building Construction Quality: Poor
Property Information
Living Sq. Ft: 672
Ground Floor Sq. Ft: 672
Building Sq. Ft: 672
# of Stories: 1
Parking & Garage Information
# of Parking Spaces: 2
Parking Type: Undefined Type - 1 Car Garage
Garage / Carport Type: Undefined Type - 1 Car
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,818
Acres: 0.1565
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.0
Sq. Ft.: 672
Stories: 1.0
Lot Size: 6,818 square feet
Style: Single Family Residential
Year Built: 1943
Year Renovated: 1943
County: Sonoma County
APN: 095232010000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Places
Transit
Monte Rio Elementary School
Public K-8 • Assigned • 0.6mi
7/10
Analy High School
Public 9-12 • Assigned • 10.5mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
7/10 Flood Factor
Estimated 71-79% 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
10 days above 86° expected this year, 25 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
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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
$492,000 – $596,000
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