21943 Duncan Rd is a 759 square foot house on a 10,454 square foot lot with 1 bathroom. Based on Redfin's Monte Rio data, we estimate the home's value is $425,268.
Single-familyProperty Type
1925Year Built
10,454 sq ftLot Size
$560Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$425,268
$2,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 14.6% lower than the average sale price ($498K) of 5 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
$791 (+4.9%)
$5,559 + $6,988
$12,547
2024
$754 (+1.2%)
$5,450 + $6,851
$12,301
2023
$746 (+1.8%)
$5,344 + $6,717
$12,061
2022
$732 (+0.6%)
$5,240 + $6,586
$11,826
2021
$728 (−7.3%)
$5,138 + $6,457
$11,595
2020
$785 (+9.4%)
$5,038 + $6,331
$11,369
2019
$718 (+41.1%)
$4,987 + $6,267
$11,254
2018
$509 (+1.1%)
$4,890 + $6,145
$11,035
2017
$503 (−5.0%)
$4,701 + $5,907
$10,608
2015
$530 (+0.6%)
$4,609 + $5,792
$10,401
2014
$527
$4,452 + $5,594
$10,046
2013
$527 (+4.9%)
$4,452 + $5,594
$10,046
2012
$502 (+0.5%)
$4,432 + $5,569
$10,001
2011
$499 (+0.2%)
$4,346 + $5,460
$9,806
2010
$498 (−0.1%)
$4,261 + $5,353
$9,614
2009
$499 (−8.6%)
$4,230 + $5,313
$9,543
2007
$546
$4,158 + $5,222
$9,380
Tax history for 21943 Duncan Rd
Year
Property tax
Land + Additions
Assessment*
2025
$791 (+4.9%)
$5,559 + $6,988
$12,547
2024
$754 (+1.2%)
$5,450 + $6,851
$12,301
2023
$746 (+1.8%)
$5,344 + $6,717
$12,061
2022
$732 (+0.6%)
$5,240 + $6,586
$11,826
2021
$728 (−7.3%)
$5,138 + $6,457
$11,595
2020
$785 (+9.4%)
$5,038 + $6,331
$11,369
2019
$718 (+41.1%)
$4,987 + $6,267
$11,254
2018
$509 (+1.1%)
$4,890 + $6,145
$11,035
2017
$503 (−5.0%)
$4,701 + $5,907
$10,608
2015
$530 (+0.6%)
$4,609 + $5,792
$10,401
2014
$527
$4,452 + $5,594
$10,046
2013
$527 (+4.9%)
$4,452 + $5,594
$10,046
2012
$502 (+0.5%)
$4,432 + $5,569
$10,001
2011
$499 (+0.2%)
$4,346 + $5,460
$9,806
2010
$498 (−0.1%)
$4,261 + $5,353
$9,614
2009
$499 (−8.6%)
$4,230 + $5,313
$9,543
2007
$546
$4,158 + $5,222
$9,380
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
RRD B6 160
SR
RC 200'
Resources and Rural Development - B6 Combining District - One Dwelling per 160 Acres
Protects lands needed for: Commercial timber production, geothermal production, aggregate resources production; Watershed, fish and wildlife habitat, biotic resources; and Agricultural production activities not subject to the agricultural resources element of the general plan. Allows very low-density residential development and recreational and visitor-serving uses where compatible with resource use and available public services; and Implements the resources and rural development land use category of the general plan.; B Combining District: to specify residential density and/or minimum parcel or lot size for a particular parcel, lot or area.
Zone overlays
Scenic Resources Combining District
Permitted uses
Include but are not limited to:
Agriculture
Greenhouse / nursery
Livestock production
Housing-Group
Housing-Single unit
Property details
Interior
Bathroom Information
# of Full Baths: 1
Room Information
# of Rooms: 2
Exterior
Exterior Information
Building Style Type: L-Shape
Building Construction Quality: Poor
Property Information
Subdivision Name: MONTE CRISTO 01
Living Sq. Ft: 759
Building Sq. Ft: 759
# of Stories: 1
Legal Description: 2002 FM 094-024-008 & 009 2001RMDMGR
Lot Information
# of Buildings: 1
Land Sq. Ft: 10,454
Legal Lot Number: 92
Acres: 0.24
County Use Description: SINGLE FAM DWELLING
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: —
Baths: 1.0
Sq. Ft.: 759
Stories: 1.0
Lot Size: 10,454 square feet
Style: Single Family Residential
Year Built: 1925
Year Renovated: 1937
County: Sonoma County
APN: 094024014000
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 • 11.7mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk 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
8 days above 84° expected this year, 21 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
82
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
$405,000 – $490,000
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