23 Diamond Ranch Ct is a 4,111 square foot house on a 0.3 acre lot with 4 bedrooms and 3 bathrooms. - it last sold on September 15, 2003 for $1,170,000. Based on Redfin's San Ramon data, we estimate the home's value is $2,531,604.
Single-familyProperty Type
2002Year Built
0.3 acresLot Size
$616Est. Price/Sq.Ft.
3 car garageParking
Source:Public Records
Redfin Estimate
$2,531,604
$1.4M since sold in September 2003$47K since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1.1% lower than the average sale price ($2.56M) of 6 comparable homes.
bridgeMLS, Bay East AOR, or Contra Costa AOR #11197037
Aug 13, 2003
Listing Removed
—
Year
Property tax
Land + Additions
Assessment*
2026
$20,650 (+3.3%)
$761,360 + $953,163
$1,714,523
2025
$19,990 (+2.6%)
$761,360 + $953,163
$1,714,523
2024
$19,483 (+1.4%)
$746,432 + $934,474
$1,680,906
2023
$19,210 (+4.0%)
$731,797 + $916,151
$1,647,948
2022
$18,477 (−3.1%)
$717,449 + $898,188
$1,615,637
2021
$19,068 (+0.8%)
$703,382 + $880,577
$1,583,959
2020
$18,910 (−8.1%)
$689,591 + $863,311
$1,552,902
2019
$20,580 (+14.1%)
$682,521 + $854,459
$1,536,980
2018
$18,035 (+3.7%)
$669,139 + $837,705
$1,506,844
2017
$17,398 (+1.2%)
$643,156 + $805,177
$1,448,333
2016
$17,197 (+4.3%)
$643,156 + $805,177
$1,448,333
2015
$16,484 (+8.7%)
$630,546 + $789,390
$1,419,936
2014
$15,166 (+18.3%)
$542,427 + $679,073
$1,221,500
2013
$12,823 (+1.0%)
$542,427 + $679,073
$1,221,500
2012
$12,698 (−6.8%)
$451,616 + $565,384
$1,017,000
2011
$13,623 (+5.8%)
$451,616 + $565,384
$1,017,000
2010
$12,871 (−12.4%)
$489,139 + $612,361
$1,101,500
2009
$14,696 (−3.6%)
$461,829 + $578,171
$1,040,000
2008
$15,247
$537,987 + $673,513
$1,211,500
Tax history for 23 Diamond Ranch Ct
Year
Property tax
Land + Additions
Assessment*
2026
$20,650 (+3.3%)
$761,360 + $953,163
$1,714,523
2025
$19,990 (+2.6%)
$761,360 + $953,163
$1,714,523
2024
$19,483 (+1.4%)
$746,432 + $934,474
$1,680,906
2023
$19,210 (+4.0%)
$731,797 + $916,151
$1,647,948
2022
$18,477 (−3.1%)
$717,449 + $898,188
$1,615,637
2021
$19,068 (+0.8%)
$703,382 + $880,577
$1,583,959
2020
$18,910 (−8.1%)
$689,591 + $863,311
$1,552,902
2019
$20,580 (+14.1%)
$682,521 + $854,459
$1,536,980
2018
$18,035 (+3.7%)
$669,139 + $837,705
$1,506,844
2017
$17,398 (+1.2%)
$643,156 + $805,177
$1,448,333
2016
$17,197 (+4.3%)
$643,156 + $805,177
$1,448,333
2015
$16,484 (+8.7%)
$630,546 + $789,390
$1,419,936
2014
$15,166 (+18.3%)
$542,427 + $679,073
$1,221,500
2013
$12,823 (+1.0%)
$542,427 + $679,073
$1,221,500
2012
$12,698 (−6.8%)
$451,616 + $565,384
$1,017,000
2011
$13,623 (+5.8%)
$451,616 + $565,384
$1,017,000
2010
$12,871 (−12.4%)
$489,139 + $612,361
$1,101,500
2009
$14,696 (−3.6%)
$461,829 + $578,171
$1,040,000
2008
$15,247
$537,987 + $673,513
$1,211,500
*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
RS-10
WSSP
Single-Family Residential Zone
The RS zone is applied to areas of the City appropriate for single-family residential land uses in neighborhoods at a density of three to six units per net acre, subject to appropriate standards. The specific allowable density for each parcel is shown on the Zoning Map by a numerical suffix residential density designator (see Section D2-8). Minimum lot size for new parcels ranges from 3,500 to 12,000 sq ft. Depending upon the applicable residential density designator, the RS zone is consistent with and implements the Single Family Low Density, Single Family Low-Medium Density, and Single Family Medium Density land use classifications of the General Plan.
Zone overlays
Westside Specific Plan
Permitted uses
Include but are not limited to:
Day care facility
Housing-Single unit
Housing-Senior
Housing-Student
Housing-Other
Jun 5, 2025 • Final
Photovoltaic - electrical (solarapp)
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: 11
Exterior
Property Information
Living Sq. Ft: 4,111
Ground Floor Sq. Ft: 2,277
Building Sq. Ft: 4,111
# of Stories: 2
Legal Description: T8188 L42
Parking & Garage Information
Garage/Parking Sq. Ft: 729
Lot Information
# of Buildings: 1
Land Sq. Ft: 13,000
Legal Lot Number: 42
Acres: 0.2984
County Use Description: SINGLE FAMILY DETACHED WITH MA
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 4,111
Stories: 2.0
Lot Size: 0.3 acres
Style: Single Family Residential
Year Built: 2002
Year Renovated: 2002
County: Contra Costa County
APN: 2112000126
Home facts updated by county records on Oct 30, 2026
Around this home
Schools
K - 12
Preschool & daycare
Neil A. Armstrong Elementary School
Public K-5 • Assigned • 0.6mi
10/10
Pine Valley Middle School
Public 6-8 • Assigned • 0.9mi
10/10
California High School
Public 9-12 • Assigned • 0.9mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
San Ramon remains competitive, with homes averaging 1 offer and selling in 29 days. Median price is $1.4M (+2.8%), while price per sq. ft. is $677 (-1.2%). Buyers have negotiation opportunities; sellers should price strategically.
San Ramon, Past 3 months,Median price $1.51M, down 4.5% YoY,Homes sold: 169 in July, up 1%,Days on market 20 days,Market Active but more balanced; slight seller advantage,Bottom line: Prices have softened, but homes are still selling relatively...