4123 Mount Isabel Rd is a 2,085 square foot house on a 4,868 square foot lot with 4 bedrooms and 3 bathrooms. - it last sold on December 14, 2005 for $620,000. Based on Redfin's Antioch data, we estimate the home's value is $597,488.
Single-familyProperty Type
2001Year Built
4,868 sq ftLot Size
$287Est. Price/Sq.Ft.
2 car garageParking
Source:Public Records
Redfin Estimate
$597,488
$23K since sold in December 2005$9,000 since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 6.8% lower than the average sale price ($641K) of 6 comparable homes.
bridgeMLS, Bay East AOR, or Contra Costa AOR #40296099
May 10, 2008
Listing Removed
—
bridgeMLS, Bay East AOR, or Contra Costa AOR #40296091
Sep 8, 2007
Listing Removed
—
Public Records
Dec 14, 2005
Sold
$620,000
$297/sq ft
Public Records
Nov 17, 2004
Sold
$510,000
$245/sq ft
bridgeMLS, Bay East AOR, or Contra Costa AOR #40045175
Oct 12, 2004
Listing Removed
—
Year
Property tax
Land + Additions
Assessment*
2026
$4,963 (+2.7%)
$133,969 + $266,610
$400,579
2025
$4,832 (+2.5%)
$133,969 + $266,610
$400,579
2024
$4,716 (+3.7%)
$131,343 + $261,383
$392,726
2023
$4,548 (+1.5%)
$128,768 + $256,258
$385,026
2022
$4,480 (+3.0%)
$126,244 + $251,234
$377,478
2021
$4,348 (+1.0%)
$123,769 + $246,308
$370,077
2020
$4,305 (+1.3%)
$121,343 + $241,479
$362,822
2019
$4,250 (+3.7%)
$120,099 + $239,003
$359,102
2018
$4,099 (+2.1%)
$117,745 + $234,317
$352,062
2017
$4,015 (+2.5%)
$113,174 + $225,219
$338,393
2016
$3,918 (−5.9%)
$113,174 + $225,219
$338,393
2015
$4,163 (−9.3%)
$110,955 + $220,803
$331,758
2014
$4,591 (−15.2%)
$107,149 + $213,227
$320,376
2013
$5,413 (+7.3%)
$107,149 + $213,227
$320,376
2012
$5,046 (−6.3%)
$69,900 + $139,100
$209,000
2011
$5,387 (−5.6%)
$61,539 + $122,461
$184,000
2010
$5,703 (+4.1%)
$73,244 + $145,756
$219,000
2009
$5,480 (−18.8%)
$84,616 + $168,384
$253,000
2008
$6,750
$80,000 + $160,000
$240,000
Tax history for 4123 Mount Isabel Rd
Year
Property tax
Land + Additions
Assessment*
2026
$4,963 (+2.7%)
$133,969 + $266,610
$400,579
2025
$4,832 (+2.5%)
$133,969 + $266,610
$400,579
2024
$4,716 (+3.7%)
$131,343 + $261,383
$392,726
2023
$4,548 (+1.5%)
$128,768 + $256,258
$385,026
2022
$4,480 (+3.0%)
$126,244 + $251,234
$377,478
2021
$4,348 (+1.0%)
$123,769 + $246,308
$370,077
2020
$4,305 (+1.3%)
$121,343 + $241,479
$362,822
2019
$4,250 (+3.7%)
$120,099 + $239,003
$359,102
2018
$4,099 (+2.1%)
$117,745 + $234,317
$352,062
2017
$4,015 (+2.5%)
$113,174 + $225,219
$338,393
2016
$3,918 (−5.9%)
$113,174 + $225,219
$338,393
2015
$4,163 (−9.3%)
$110,955 + $220,803
$331,758
2014
$4,591 (−15.2%)
$107,149 + $213,227
$320,376
2013
$5,413 (+7.3%)
$107,149 + $213,227
$320,376
2012
$5,046 (−6.3%)
$69,900 + $139,100
$209,000
2011
$5,387 (−5.6%)
$61,539 + $122,461
$184,000
2010
$5,703 (+4.1%)
$73,244 + $145,756
$219,000
2009
$5,480 (−18.8%)
$84,616 + $168,384
$253,000
2008
$6,750
$80,000 + $160,000
$240,000
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning and permits
Zoning
Permits
P-D
Planned Development District
This district accommodates various types of development, such as neighborhood and district shopping centers, professional and administrative offices multiple housing developments, single-family residential developments, commercial service centers, and industrial parks, or any other use or combination of uses which are appropriately a part of a planned development. This district is intended to enable and encourage flexibility in the design and development of land so as to promote its most appropriate use; to allow diversification in the relationship of various uses, structures, and space; to facilitate the adequate and economical provision of streets and utilities; to preserve the natural and scenic qualities of open space; to offer recreational opportunities convenient to residents to enhance the appearance of neighbor-hoods through the preservation of natural green spaces; and to counteract the effects of urban con-gestion and monotony. The minimum area required for the establishment of a residential Planned Development shall be three contiguous acres of land and the minimum area for an exclusively non-residential Planned Development shall be one contiguous acre of land.; Planned Development Districts are intended to accommodate a wide range of residential, commercial and industrial land uses which are mutually supportive and compatible with existing and proposed develop-ment on surrounding properties. P-D Districts shall encourage the use of flexible development standards designed to appropriately integrate a project into its natural and/or man-made setting and shall provide for a mix of land uses to serve identified community needs. In addition, P-D Districts shall orient pedestrian and bicycle facilities to encourage non-auto oriented circulation within the development. Further-more, the P-D process may be used to implement the various Specific Plans adopted by the city. Once established, the P-D District becomes, in effect, the zoning code for the area within its respective boundaries.
Permitted uses
Include but are not limited to:
No uses permitted by right
Oct 8, 2018 • Final
Building permit - 09 - miscellaneous residential construction
Install a roof-mounted photovoltaic system on a residential building.
Electrical
Solar
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: 9
Exterior
Property Information
Subdivision Name: SUBDIVISION 8410
Living Sq. Ft: 2,085
Ground Floor Sq. Ft: 1,102
Building Sq. Ft: 2,085
# of Stories: 2
Legal Description: T8410 L89
Parking & Garage Information
Garage/Parking Sq. Ft: 472
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,868
Legal Lot Number: 89
Acres: 0.1118
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 2,085
Stories: 2.0
Lot Size: 4,868 square feet
Style: Single Family Residential
Year Built: 2001
Year Renovated: 2001
County: Contra Costa County
APN: 0556500148
Home facts updated by county records on Oct 30, 2026
Around this home
Schools
K - 12
Preschool & daycare
Muir (John) Elementary School
Public K-5 • Assigned • 0.9mi
5/10
Dallas Ranch Middle School
Public 6-8 • Assigned • 0.3mi
3/10
Deer Valley High School
Public 9-12 • Assigned • 1.5mi
5/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
The market in Antioch right now has inventory numbers of over 2.5 months of housing supply. Homes that are priced properly, and presented well, can expect an offer with about a 21 day year to date timeline. Buyers look for recent upgrades, including...