20215 Alder Rd is a 1,806 square foot house on a 4,950 square foot lot with 2 bedrooms and 2 bathrooms. - it last sold on August 14, 2009 for $305,000. Based on Redfin's Monte Rio data, we estimate the home's value is $664,622.
Single-familyProperty Type
1950Year Built
4,950 sq ftLot Size
$368Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$664,622
$360K since sold in August 2009$19K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1.3% higher than the average sale price ($656K) 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
Apr 18, 2025 • Final
Building permit with plan check
Elevate an existing single-family home and construct a new foundation within the existing footprint. Install new steps and landings, and build a garage addition.
Addition
Grading
Apr 16, 2025 • Final
Building revision
Provide architectural as-built drawings showing flood vents installed in the garage and crawlspace enclosure. Include the final elevation certificate and a letter of plan conformance from the surveyor of record.
Grading
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: 270
Bathroom Information
# of Full Baths: 2
Heating & Cooling
Heating Fuel Type: Electric
Heating Type: Wall Furnace
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 5
Exterior
Exterior Information
Foundation Type: Slab
Building Style Type: Square Design
Construction Type: Wood/Steel
Building Construction Quality: Fair
Exterior Wall: Wood
Property Information
Subdivision Name: STARRETT 51
Living Sq. Ft: 1,806
Ground Floor Sq. Ft: 730
Building Sq. Ft: 2,322
# of Stories: 2
Legal Description: 74 FORM 01 & PT TO 15 PER M/D
Parking & Garage Information
# of Parking Spaces: 2
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 516
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,950
Legal Lot Number: 20
Acres: 0.1136
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Location Information
Parcel Location Influence: Woodland
Utility Information
Sewer Type: Septic
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 2.0
Sq. Ft.: 1,806
Stories: 2.0
Lot Size: 4,950 square feet
Style: Single Family Residential
Year Built: 1950
Year Renovated: 1980
County: Sonoma County
APN: 095222014000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
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
9/10 Flood Factor
Estimated 80%+ 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
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43
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73
52
81
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78
53
75
49
62
45
58
44
Jan
Feb
Mar
Apr
May
Jun
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Aug
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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
$632,000 – $765,000
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