321 Sweeney Rd is a 1,367 square foot house on a 5,200 square foot lot with 3 bedrooms and 1 bathroom. Based on Redfin's Antioch data, we estimate the home's value is $451,230.
Single-familyProperty Type
1952Year Built
5,200 sq ftLot Size
$330Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$451,230
$2,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 7.8% lower than the average sale price ($489K) 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
$2,191 (+3.4%)
$59,899 + $94,545
$154,444
2024
$2,119 (+3.1%)
$58,725 + $92,692
$151,417
2023
$2,056 (+1.4%)
$57,574 + $90,875
$148,449
2022
$2,028 (+4.1%)
$56,446 + $89,094
$145,540
2021
$1,948 (+1.0%)
$55,340 + $87,348
$142,688
2020
$1,927 (+1.3%)
$54,255 + $85,636
$139,891
2019
$1,902 (+3.7%)
$53,699 + $84,758
$138,457
2018
$1,833 (+3.0%)
$52,647 + $83,097
$135,744
2017
$1,780 (+3.2%)
$50,603 + $79,871
$130,474
2016
$1,724 (+1.5%)
$50,603 + $79,871
$130,474
2015
$1,698 (+3.4%)
$49,611 + $78,305
$127,916
2014
$1,642 (+7.7%)
$47,909 + $75,619
$123,528
2013
$1,525 (+36.7%)
$47,909 + $75,619
$123,528
2012
$1,115 (+16.4%)
$44,602 + $70,398
$115,000
2011
$958 (−29.1%)
$31,997 + $50,503
$82,500
2010
$1,352 (−1.5%)
$26,955 + $42,545
$69,500
2009
$1,372 (+0.5%)
$41,305 + $65,195
$106,500
2008
$1,366
$43,245 + $68,255
$111,500
Tax history for 321 Sweeney Rd
Year
Property tax
Land + Additions
Assessment*
2025
$2,191 (+3.4%)
$59,899 + $94,545
$154,444
2024
$2,119 (+3.1%)
$58,725 + $92,692
$151,417
2023
$2,056 (+1.4%)
$57,574 + $90,875
$148,449
2022
$2,028 (+4.1%)
$56,446 + $89,094
$145,540
2021
$1,948 (+1.0%)
$55,340 + $87,348
$142,688
2020
$1,927 (+1.3%)
$54,255 + $85,636
$139,891
2019
$1,902 (+3.7%)
$53,699 + $84,758
$138,457
2018
$1,833 (+3.0%)
$52,647 + $83,097
$135,744
2017
$1,780 (+3.2%)
$50,603 + $79,871
$130,474
2016
$1,724 (+1.5%)
$50,603 + $79,871
$130,474
2015
$1,698 (+3.4%)
$49,611 + $78,305
$127,916
2014
$1,642 (+7.7%)
$47,909 + $75,619
$123,528
2013
$1,525 (+36.7%)
$47,909 + $75,619
$123,528
2012
$1,115 (+16.4%)
$44,602 + $70,398
$115,000
2011
$958 (−29.1%)
$31,997 + $50,503
$82,500
2010
$1,352 (−1.5%)
$26,955 + $42,545
$69,500
2009
$1,372 (+0.5%)
$41,305 + $65,195
$106,500
2008
$1,366
$43,245 + $68,255
$111,500
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
R-6
Single-Family Low Density Residential District
These districts are the standard single-family zones allowing a maximum of six R-6 District dwelling units per gross acre respectively. The districts are consistent with the Low Density Residential General Plan Designation, of two to four dwelling units per gross developable acre, and with the Medium-Low Density Residential General Plan Designation of four to six dwelling units per gross developable acre. The R-6 district is also consistent with any Focused Planning Area designated by the General Plan permitting single family residential development up to six dwelling units per gross developable acre.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Senior
Park & open space
Property details
Interior
Room Information
# of Rooms: 6
Exterior
Property Information
Subdivision Name: GARROW SUB
Living Sq. Ft: 1,367
Ground Floor Sq. Ft: 1,367
Building Sq. Ft: 1,367
# of Stories: 1
Legal Description: GARROW SUBN #1 LOT 28
Lot Information
# of Buildings: 1
Land Sq. Ft: 5,200
Legal Lot Number: 28
Acres: 0.1194
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 1,367
Stories: 1.0
Lot Size: 5,200 square feet
Style: Single Family Residential
Year Built: 1952
Year Renovated: 1952
County: Contra Costa County
APN: 0682450309
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Belshaw Elementary School
Public K-5 • Assigned • 0.1mi
1/10
Park Middle School
Public 6-8 • Assigned • 0.8mi
2/10
Antioch High School
Public 9-12 • Assigned • 1.2mi
3/10
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
4/10 Fire Factor
1% chance of being in a wildfire in next 30 years
6/10 Heat Factor
7 days above 101° expected this year, 14 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
16 unhealthy days expected this year, 19 days in 30 years
Provided by First Street
Historical weather
Antioch, CA • 94509
Average low and high temperatures (°F)
59
42
63
46
71
51
72
52
80
57
86
60
85
61
91
64
85
63
77
58
62
49
55
45
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 12.2 hours in
June and 4.7 hours in December, placing it above the
U.S. average for solar exposure.
12.2 hrs
4.7 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$429,000 – $519,000
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