401 San Diego Pl is a 1,891 square foot house on a 7,500 square foot lot with 3 bedrooms and 2 bathrooms. Based on Redfin's San Ramon data, we estimate the home's value is $1,458,222.
Single-familyProperty Type
1980Year Built
7,500 sq ftLot Size
$771Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,458,222
$2,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 8.3% higher than the average sale price ($1.35M) 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
$5,446 (+2.2%)
$143,364 + $275,793
$419,157
2024
$5,327 (+1.9%)
$140,553 + $270,386
$410,939
2023
$5,229 (+0.8%)
$137,798 + $265,085
$402,883
2022
$5,188 (+2.4%)
$135,097 + $259,888
$394,985
2021
$5,069 (+1.7%)
$132,449 + $254,793
$387,242
2020
$4,984 (+1.0%)
$129,852 + $249,798
$379,650
2019
$4,933 (+3.9%)
$128,521 + $247,237
$375,758
2018
$4,749 (+3.9%)
$126,001 + $242,390
$368,391
2017
$4,570 (+1.7%)
$121,109 + $232,979
$354,088
2016
$4,493 (+1.7%)
$121,109 + $232,979
$354,088
2015
$4,420 (+1.7%)
$118,735 + $228,411
$347,146
2014
$4,345 (+1.6%)
$114,662 + $220,574
$335,236
2013
$4,276 (+3.3%)
$114,662 + $220,574
$335,236
2012
$4,138 (+2.3%)
$114,144 + $219,578
$333,722
2011
$4,046 (+1.7%)
$111,906 + $215,273
$327,179
2010
$3,980
$109,712 + $211,052
$320,764
2009
$3,983 (+4.1%)
$108,893 + $209,475
$318,368
2008
$3,828
$109,152 + $209,973
$319,125
Tax history for 401 San Diego Pl
Year
Property tax
Land + Additions
Assessment*
2025
$5,446 (+2.2%)
$143,364 + $275,793
$419,157
2024
$5,327 (+1.9%)
$140,553 + $270,386
$410,939
2023
$5,229 (+0.8%)
$137,798 + $265,085
$402,883
2022
$5,188 (+2.4%)
$135,097 + $259,888
$394,985
2021
$5,069 (+1.7%)
$132,449 + $254,793
$387,242
2020
$4,984 (+1.0%)
$129,852 + $249,798
$379,650
2019
$4,933 (+3.9%)
$128,521 + $247,237
$375,758
2018
$4,749 (+3.9%)
$126,001 + $242,390
$368,391
2017
$4,570 (+1.7%)
$121,109 + $232,979
$354,088
2016
$4,493 (+1.7%)
$121,109 + $232,979
$354,088
2015
$4,420 (+1.7%)
$118,735 + $228,411
$347,146
2014
$4,345 (+1.6%)
$114,662 + $220,574
$335,236
2013
$4,276 (+3.3%)
$114,662 + $220,574
$335,236
2012
$4,138 (+2.3%)
$114,144 + $219,578
$333,722
2011
$4,046 (+1.7%)
$111,906 + $215,273
$327,179
2010
$3,980
$109,712 + $211,052
$320,764
2009
$3,983 (+4.1%)
$108,893 + $209,475
$318,368
2008
$3,828
$109,152 + $209,973
$319,125
*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-7
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.
Permitted uses
Include but are not limited to:
Day care facility
Housing-Single unit
Housing-Senior
Housing-Student
Housing-Other
Sep 26, 2025 • Final
Furnace a/c - mechanical (residential)
HVAC
Nov 21, 2022 • Final
Alteration, remodel, repair - building residential
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: 9
Exterior
Property Information
Subdivision Name: SUBDIVISION 3845
Living Sq. Ft: 1,891
Ground Floor Sq. Ft: 1,891
Building Sq. Ft: 1,891
# of Stories: 1
Legal Description: T03845 L0106 B EX MR
Parking & Garage Information
Garage/Parking Sq. Ft: 504
Lot Information
# of Buildings: 1
Land Sq. Ft: 7,500
Legal Lot Number: 106
Acres: 0.1722
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,891
Stories: 1.0
Lot Size: 7,500 square feet
Style: Single Family Residential
Year Built: 1980
Year Renovated: 1985
County: Contra Costa County
APN: 2122920255
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Montevideo Elementary School
Public K-5 • Assigned • 0.5mi
9/10
Pine Valley Middle School
Public 6-8 • Assigned • 0.9mi
10/10
California High School
Public 9-12 • Assigned • 0.3mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
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...