20217 Alder Rd is a 800 square foot house on a 4,000 square foot lot with 2 bedrooms and 1 bathroom. - it last sold on April 30, 1976 for $21,000. Based on Redfin's Monte Rio data, we estimate the home's value is $484,765.
Single-familyProperty Type
1953Year Built
4,000 sq ftLot Size
$606Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$484,765
$464K since sold in April 1976$16K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 12.3% higher than the average sale price ($432K) 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
Feb 20, 2020 • Final
Building permit with plan check
Electrical
Solar
Jun 11, 2016 • Final
Building permit with plan check
Legalize the conversion of a garage into a living space.
Addition
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: Square Design
Construction Type: Wood/Steel
Building Construction Quality: Fair
Property Information
Subdivision Name: 51 STARRETT SUB
Living Sq. Ft: 800
Ground Floor Sq. Ft: 800
Building Sq. Ft: 800
# of Stories: 1
Legal Description: 74 FORM PT OF 95-222-01 PER M/D
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,000
Legal Lot Number: 20
Acres: 0.0918
Zoning Code: RR1
County Use Description: RURAL RESID-1 RESID
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.0
Sq. Ft.: 800
Stories: 1.0
Lot Size: 4,000 square feet
Style: Single Family Residential
Year Built: 1953
Year Renovated: —
County: Sonoma County
APN: 095222015000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Places
Transit
Monte Rio Elementary School
Public K-8 • Assigned • 0.7mi
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
8/10 Flood Factor
Estimated 74-82% 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, 26 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
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66
46
74
49
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73
52
81
53
78
53
75
49
62
45
58
44
Jan
Feb
Mar
Apr
May
Jun
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Aug
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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
$461,000 – $558,000
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