166 Old County Rd is a 1,760 square foot house on a 0.39 acre lot with 4 bedrooms and 2 bathrooms. Based on Redfin's Crockett data, we estimate the home's value is $633,871.
Single-familyProperty Type
1960Year Built
0.39 acresLot Size
$360Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$633,871
$4,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 17.9% lower than the average sale price ($772K) 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
$2,051 (+5.3%)
$2,647 + $48,077
$50,724
2024
$1,947 (+5.4%)
$2,596 + $47,135
$49,731
2023
$1,848 (+7.8%)
$2,546 + $46,211
$48,757
2022
$1,715 (+1.3%)
$2,497 + $45,305
$47,802
2021
$1,692 (+1.9%)
$2,449 + $44,417
$46,866
2020
$1,661 (+5.7%)
$2,401 + $43,547
$45,948
2019
$1,571 (+1.7%)
$2,377 + $43,101
$45,478
2018
$1,545 (+2.2%)
$2,331 + $42,256
$44,587
2017
$1,512 (+3.1%)
$2,242 + $40,616
$42,858
2016
$1,467 (+0.3%)
$2,242 + $40,616
$42,858
2015
$1,462 (+3.1%)
$2,199 + $39,820
$42,019
2014
$1,418 (+6.9%)
$2,124 + $38,454
$40,578
2013
$1,327 (+9.6%)
$2,124 + $38,454
$40,578
2012
$1,211 (+6.0%)
$2,115 + $38,281
$40,396
2011
$1,143 (+2.2%)
$2,074 + $37,531
$39,605
2010
$1,118 (−1.2%)
$2,034 + $36,796
$38,830
2009
$1,131 (+4.3%)
$2,019 + $36,521
$38,540
2008
$1,084
$2,024 + $36,608
$38,632
Tax history for 166 Old County Rd
Year
Property tax
Land + Additions
Assessment*
2025
$2,051 (+5.3%)
$2,647 + $48,077
$50,724
2024
$1,947 (+5.4%)
$2,596 + $47,135
$49,731
2023
$1,848 (+7.8%)
$2,546 + $46,211
$48,757
2022
$1,715 (+1.3%)
$2,497 + $45,305
$47,802
2021
$1,692 (+1.9%)
$2,449 + $44,417
$46,866
2020
$1,661 (+5.7%)
$2,401 + $43,547
$45,948
2019
$1,571 (+1.7%)
$2,377 + $43,101
$45,478
2018
$1,545 (+2.2%)
$2,331 + $42,256
$44,587
2017
$1,512 (+3.1%)
$2,242 + $40,616
$42,858
2016
$1,467 (+0.3%)
$2,242 + $40,616
$42,858
2015
$1,462 (+3.1%)
$2,199 + $39,820
$42,019
2014
$1,418 (+6.9%)
$2,124 + $38,454
$40,578
2013
$1,327 (+9.6%)
$2,124 + $38,454
$40,578
2012
$1,211 (+6.0%)
$2,115 + $38,281
$40,396
2011
$1,143 (+2.2%)
$2,074 + $37,531
$39,605
2010
$1,118 (−1.2%)
$2,034 + $36,796
$38,830
2009
$1,131 (+4.3%)
$2,019 + $36,521
$38,540
2008
$1,084
$2,024 + $36,608
$38,632
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Apr 17, 2023 • Final
Building/residential/rp/repair
Repair fire damage to the roof, walls, and electrical systems. Perform mechanical work according to the plans.
Remodel
Aug 17, 2022 • Final
Permit submittal
Repair fire damage to the roof, walls, and electrical systems. Perform mechanical work according to the plans.
Electrical
HVAC
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: 7
Exterior
Property Information
Living Sq. Ft: 1,760
Ground Floor Sq. Ft: 1,760
Building Sq. Ft: 1,760
# of Stories: 1
Legal Description: PCL MAP 110 PG 33 PCL A
Parking & Garage Information
Garage/Parking Sq. Ft: 451
Lot Information
# of Buildings: 1
Land Sq. Ft: 17,075
Acres: 0.392
Zoning Code: R-6
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 1,760
Stories: 1.0
Lot Size: 0.39 acres
Style: Single Family Residential
Year Built: 1960
Year Renovated: 1980
County: Contra Costa County
APN: 3550300200
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Rodeo Hills Elementary School
Public K-5 • Assigned • 1.9mi
5/10
Carquinez Middle School
Public 6-8 • Assigned • 1.3mi
4/10
John Swett High School
Public 9-12 • Assigned • 1.4mi
6/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
8/10 Flood Factor
Estimated 80%+ chance of a flood reaching the building in the next 30 years
4/10 Fire Factor
0.93% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 93° expected this year, 15 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, 17 days in 30 years
Provided by First Street
Historical weather
Crockett, CA • 94525
Average low and high temperatures (°F)
57
43
60
45
67
49
65
48
71
51
73
54
71
53
79
56
77
56
73
54
61
47
54
44
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 11.4 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.4 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$603,000 – $729,000
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