421 Constantine Ct is a 1,878 square foot house on a 2,254 square foot lot with 3 bedrooms and 3 bathrooms. Based on Redfin's San Ramon data, we estimate the home's value is $1,206,882.
Single-familyProperty Type
2007Year Built
2,254 sq ftLot Size
$643Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,206,882
$13K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 26.9% lower than the average sale price ($1.65M) 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
$9,593 (+2.1%)
$401,795 + $401,926
$803,721
2024
$9,393 (+1.7%)
$393,917 + $394,046
$787,963
2023
$9,237 (+0.8%)
$386,194 + $386,320
$772,514
2022
$9,168 (+2.2%)
$378,622 + $378,746
$757,368
2021
$8,969 (+1.2%)
$371,199 + $371,320
$742,519
2020
$8,865 (+1.1%)
$363,921 + $364,040
$727,961
2019
$8,770 (+3.9%)
$360,190 + $360,308
$720,498
2018
$8,444 (+3.8%)
$353,128 + $353,244
$706,372
2017
$8,134 (+1.4%)
$339,416 + $339,528
$678,944
2016
$8,025 (+1.4%)
$339,416 + $339,528
$678,944
2015
$7,917 (+1.4%)
$332,761 + $332,871
$665,632
2014
$7,805 (+15.9%)
$321,343 + $321,449
$642,792
2013
$6,734 (+0.8%)
$321,343 + $321,449
$642,792
2012
$6,684 (−8.8%)
$275,704 + $275,796
$551,500
2011
$7,325 (+1.4%)
$277,454 + $277,546
$555,000
2010
$7,226 (+13.9%)
$307,470 + $307,572
$615,042
2009
$6,343 (−12.0%)
$305,173 + $305,274
$610,447
2008
$7,206
$264,956 + $265,044
$530,000
Tax history for 421 Constantine Ct
Year
Property tax
Land + Additions
Assessment*
2025
$9,593 (+2.1%)
$401,795 + $401,926
$803,721
2024
$9,393 (+1.7%)
$393,917 + $394,046
$787,963
2023
$9,237 (+0.8%)
$386,194 + $386,320
$772,514
2022
$9,168 (+2.2%)
$378,622 + $378,746
$757,368
2021
$8,969 (+1.2%)
$371,199 + $371,320
$742,519
2020
$8,865 (+1.1%)
$363,921 + $364,040
$727,961
2019
$8,770 (+3.9%)
$360,190 + $360,308
$720,498
2018
$8,444 (+3.8%)
$353,128 + $353,244
$706,372
2017
$8,134 (+1.4%)
$339,416 + $339,528
$678,944
2016
$8,025 (+1.4%)
$339,416 + $339,528
$678,944
2015
$7,917 (+1.4%)
$332,761 + $332,871
$665,632
2014
$7,805 (+15.9%)
$321,343 + $321,449
$642,792
2013
$6,734 (+0.8%)
$321,343 + $321,449
$642,792
2012
$6,684 (−8.8%)
$275,704 + $275,796
$551,500
2011
$7,325 (+1.4%)
$277,454 + $277,546
$555,000
2010
$7,226 (+13.9%)
$307,470 + $307,572
$615,042
2009
$6,343 (−12.0%)
$305,173 + $305,274
$610,447
2008
$7,206
$264,956 + $265,044
$530,000
*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
RMH
Medium-High Density Residential Zone
The RMH zone is applied to areas of the City appropriate for townhouses or apartments at a density of 14 to 22 units per net acre. Minimum lot size for new multifamily parcels is 10,000 square ft or larger. Single-family dwellings are also permitted with a minimum lot size for new parcels of 2,000 sq ft with a maximum of 3,100 based on the per acre RMH density range. The RMH zone is consistent with and implements the Multiple Family High Density land use classification of the General Plan.
Permitted uses
Include but are not limited to:
Day care facility
Housing-Single unit
Housing-Multiple units
Housing-Senior
Housing-Student
Housing-Other
Feb 3, 2026 • Final
Water heater/softener - plumbing
Plumbing
Water heater
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: 8
Exterior
Property Information
Subdivision Name: SUBDIVISION 8797
Living Sq. Ft: 1,878
Ground Floor Sq. Ft: 814
Building Sq. Ft: 1,878
# of Stories: 2
Legal Description: T8797 L40
Parking & Garage Information
Garage/Parking Sq. Ft: 514
Lot Information
# of Buildings: 1
Land Sq. Ft: 2,254
Legal Lot Number: 40
Acres: 0.0517
County Use Description: SINGLE FAMILY DETACHED WITH MA
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 3.0
Sq. Ft.: 1,878
Stories: 2.0
Lot Size: 2,254 square feet
Style: Single Family Residential
Year Built: 2007
Year Renovated: 2008
County: Contra Costa County
APN: 2087400400
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Twin Creeks Elementary School
Public K-5 • Assigned • 0.4mi
10/10
Iron Horse Middle School
Public 6-8 • Assigned • 1.6mi
10/10
California High School
Public 9-12 • Assigned • 2.9mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
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