20291 Alder Rd is a 1,182 square foot house on a 6,248 square foot lot with 2 bedrooms and 2 bathrooms. Based on Redfin's Monte Rio data, we estimate the home's value is $545,343.
Single-familyProperty Type
1956Year Built
6,248 sq ftLot Size
$461Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$545,343
$21K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 27.2% lower than the average sale price ($749K) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$1,529 (+3.4%)
$21,751 + $58,763
$80,514
2024
$1,480 (+1.6%)
$21,325 + $57,611
$78,936
2023
$1,456 (+1.9%)
$20,907 + $56,482
$77,389
2022
$1,429 (+1.0%)
$20,498 + $55,375
$75,873
2021
$1,415 (−3.6%)
$20,097 + $54,290
$74,387
2020
$1,468 (+5.7%)
$19,703 + $53,226
$72,929
2019
$1,389 (+20.6%)
$19,501 + $52,681
$72,182
2018
$1,151 (+3.2%)
$19,119 + $51,649
$70,768
2017
$1,116 (−2.1%)
$18,378 + $49,645
$68,023
2016
$1,139 (+2.5%)
$18,018 + $48,672
$66,690
2015
$1,111 (+1.4%)
$18,018 + $48,672
$66,690
2014
$1,096 (+0.3%)
$17,401 + $47,002
$64,403
2013
$1,093 (+3.3%)
$17,401 + $47,002
$64,403
2012
$1,059 (+1.3%)
$17,323 + $46,790
$64,113
2011
$1,045 (+0.7%)
$16,984 + $45,873
$62,857
2010
$1,038 (−0.4%)
$16,651 + $44,974
$61,625
2009
$1,041 (+3.1%)
$16,527 + $44,638
$61,165
2007
$1,010
$16,243 + $37,368
$53,611
Tax history for 20291 Alder Rd
Year
Property tax
Land + Additions
Assessment*
2025
$1,529 (+3.4%)
$21,751 + $58,763
$80,514
2024
$1,480 (+1.6%)
$21,325 + $57,611
$78,936
2023
$1,456 (+1.9%)
$20,907 + $56,482
$77,389
2022
$1,429 (+1.0%)
$20,498 + $55,375
$75,873
2021
$1,415 (−3.6%)
$20,097 + $54,290
$74,387
2020
$1,468 (+5.7%)
$19,703 + $53,226
$72,929
2019
$1,389 (+20.6%)
$19,501 + $52,681
$72,182
2018
$1,151 (+3.2%)
$19,119 + $51,649
$70,768
2017
$1,116 (−2.1%)
$18,378 + $49,645
$68,023
2016
$1,139 (+2.5%)
$18,018 + $48,672
$66,690
2015
$1,111 (+1.4%)
$18,018 + $48,672
$66,690
2014
$1,096 (+0.3%)
$17,401 + $47,002
$64,403
2013
$1,093 (+3.3%)
$17,401 + $47,002
$64,403
2012
$1,059 (+1.3%)
$17,323 + $46,790
$64,113
2011
$1,045 (+0.7%)
$16,984 + $45,873
$62,857
2010
$1,038 (−0.4%)
$16,651 + $44,974
$61,625
2009
$1,041 (+3.1%)
$16,527 + $44,638
$61,165
2007
$1,010
$16,243 + $37,368
$53,611
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
May 5, 2026 • Final
Building permit no plan check
Plumbing
Water heater
Apr 14, 2026 • Active
Building permit no plan check
HVAC
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: 2
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: Average
Property Information
Subdivision Name: STARRETT 51
Living Sq. Ft: 1,182
Building Sq. Ft: 1,182
# of Stories: 1
Legal Description: LOT 45 STARRETT SUB TR 51
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,248
Legal Lot Number: 45
Acres: 0.1434
Zoning Code: RR1
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 2.0
Sq. Ft.: 1,182
Stories: 1.0
Lot Size: 6,248 square feet
Style: Single Family Residential
Year Built: 1956
Year Renovated: 1975
County: Sonoma County
APN: 095221014000
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 • 10.5mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
6/10 Flood Factor
Estimated 67-74% 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
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
$519,000 – $628,000
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