3686 Stone Rd is a 1,330 square foot house on a 0.37 acre lot with 3 bedrooms and 2 bathrooms. Based on Redfin's Bethel Island data, we estimate the home's value is $568,530.
Single-familyProperty Type
1979Year Built
0.37 acresLot Size
$427Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$568,530
$4,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 8.6% lower than the average sale price ($622K) 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
$2,814 (+1.7%)
$21,458 + $133,072
$154,530
2024
$2,768 (+1.0%)
$21,038 + $130,463
$151,501
2023
$2,741 (+0.7%)
$20,626 + $127,905
$148,531
2022
$2,722 (+2.4%)
$20,222 + $125,398
$145,620
2021
$2,659 (+1.6%)
$19,826 + $122,940
$142,766
2020
$2,618 (+8.2%)
$19,438 + $120,530
$139,968
2019
$2,418 (+2.2%)
$19,239 + $119,295
$138,534
2018
$2,367 (+0.8%)
$18,862 + $116,956
$135,818
2017
$2,349 (+8.4%)
$18,131 + $112,415
$130,546
2016
$2,166 (−0.3%)
$18,131 + $112,415
$130,546
2015
$2,172 (+6.6%)
$17,776 + $110,211
$127,987
2014
$2,037 (+0.6%)
$17,167 + $106,430
$123,597
2013
$2,024 (+1.4%)
$17,167 + $106,430
$123,597
2012
$1,996 (+2.5%)
$17,090 + $105,949
$123,039
2011
$1,948 (+1.7%)
$16,755 + $103,872
$120,627
2010
$1,915 (+1.7%)
$16,427 + $101,836
$118,263
2009
$1,882 (+5.2%)
$16,305 + $101,075
$117,380
2008
$1,789
$16,344 + $101,316
$117,660
Tax history for 3686 Stone Rd
Year
Property tax
Land + Additions
Assessment*
2025
$2,814 (+1.7%)
$21,458 + $133,072
$154,530
2024
$2,768 (+1.0%)
$21,038 + $130,463
$151,501
2023
$2,741 (+0.7%)
$20,626 + $127,905
$148,531
2022
$2,722 (+2.4%)
$20,222 + $125,398
$145,620
2021
$2,659 (+1.6%)
$19,826 + $122,940
$142,766
2020
$2,618 (+8.2%)
$19,438 + $120,530
$139,968
2019
$2,418 (+2.2%)
$19,239 + $119,295
$138,534
2018
$2,367 (+0.8%)
$18,862 + $116,956
$135,818
2017
$2,349 (+8.4%)
$18,131 + $112,415
$130,546
2016
$2,166 (−0.3%)
$18,131 + $112,415
$130,546
2015
$2,172 (+6.6%)
$17,776 + $110,211
$127,987
2014
$2,037 (+0.6%)
$17,167 + $106,430
$123,597
2013
$2,024 (+1.4%)
$17,167 + $106,430
$123,597
2012
$1,996 (+2.5%)
$17,090 + $105,949
$123,039
2011
$1,948 (+1.7%)
$16,755 + $103,872
$120,627
2010
$1,915 (+1.7%)
$16,427 + $101,836
$118,263
2009
$1,882 (+5.2%)
$16,305 + $101,075
$117,380
2008
$1,789
$16,344 + $101,316
$117,660
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Jun 16, 2020 • Final
Building/residential/al/alteration
Electrical
Kitchen
Remodel
Jan 30, 2010 • Final
Building/residential/rp/repair
Remodel
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
Room Information
# of Rooms: 5
Exterior
Property Information
Subdivision Name: SANMOUND PARK
Living Sq. Ft: 1,330
Ground Floor Sq. Ft: 1,330
Building Sq. Ft: 1,330
# of Stories: 1
Legal Description: SANDMOUND PARK LOT 33 & TR ADJ
Lot Information
# of Buildings: 1
Land Sq. Ft: 16,214
Legal Lot Number: 33
Acres: 0.3722
Zoning Code: F-1
County Use Description: SINGLE FAMILY
Location Information
Parcel Location Influence: Waterfront
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,330
Stories: 1.0
Lot Size: 0.37 acres
Style: Single Family Residential
Year Built: 1979
Year Renovated: 1985
County: Contra Costa County
APN: 0311310445
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Summer Lake Elementary
Public K-5 • Assigned • 1.7mi
5/10
Delta Vista Middle School
Public 6-8 • Assigned • 3.6mi
2/10
Freedom High School
Public 9-12 • Assigned • 5.7mi
5/10
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
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
6/10 Heat Factor
6 days above 101° expected this year, 12 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
10/10 Air Factor
21 unhealthy days expected this year, 23 days in 30 years
Provided by First Street
Historical weather
Bethel Island, CA • 94511
Average low and high temperatures (°F)
58
40
63
45
71
50
72
51
80
56
85
58
85
58
90
62
86
61
78
55
63
47
55
44
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 12.8 hours in
June and 4.6 hours in December, placing it above the
U.S. average for solar exposure.
12.8 hrs
4.6 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$541,000 – $654,000
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