21425 Main St is a 587 square foot house on a 3,240 square foot lot with 1 bedroom and 1 bathroom. - it last sold on July 09, 2012 for $80,000. Based on Redfin's Monte Rio data, we estimate the home's value is $387,412.
Single-familyProperty Type
1910Year Built
3,240 sq ftLot Size
$660Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$387,412
$307K since sold in July 2012$123K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 2.3% higher than the average sale price ($379K) of 5 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
Repair fire damage to the structure.
Remodel
Jun 11, 2016 • Final
Building permit no plan check
Electrical
Plumbing
Remodel
Roofing
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: 318
Bathroom Information
# of Full Baths: 1
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 4
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood/Steel
Building Construction Quality: Fair
Property Information
Subdivision Name: MONTE RIO PARK
Living Sq. Ft: 587
Building Sq. Ft: 587
# of Stories: 1
Legal Description: LOT 1
Lot Information
# of Buildings: 1
Land Sq. Ft: 3,240
Legal Lot Number: 1
Acres: 0.0744
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: 1.0
Sq. Ft.: 587
Stories: 1.0
Lot Size: 3,240 square feet
Style: Single Family Residential
Year Built: 1910
Year Renovated: 1950
County: Sonoma County
APN: 095139002000
Home facts updated by county records on Aug 13, 2026
Around this home
Schools
Monte Rio Elementary School
Public K-8 • Assigned • 0.6mi
7/10
Analy High School
Public 9-12 • Assigned • 10.7mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Historical weather
Monte Rio, CA • 95462
Average low and high temperatures (°F)
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82
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78
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75
49
62
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58
44
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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
$369,000 – $446,000
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