9453 Alcosta Blvd is a 2,040 square foot house on a 10,450 square foot lot with 4 bedrooms and 3 bathrooms. Based on Redfin's San Ramon data, we estimate the home's value is $1,330,777.
Single-familyProperty Type
1965Year Built
10,450 sq ftLot Size
$652Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,330,777
$8,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9% lower than the average sale price ($1.46M) 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
$2,034 (+2.0%)
$21,805 + $89,897
$111,702
2024
$1,995 (+2.3%)
$21,378 + $88,135
$109,513
2023
$1,951 (+0.6%)
$20,959 + $86,407
$107,366
2022
$1,938 (+1.7%)
$20,549 + $84,713
$105,262
2021
$1,907 (+1.3%)
$20,147 + $83,052
$103,199
2020
$1,883 (+2.0%)
$19,752 + $81,424
$101,176
2019
$1,846 (+3.7%)
$19,550 + $80,590
$100,140
2018
$1,781 (+3.8%)
$19,167 + $79,010
$98,177
2017
$1,716 (+2.3%)
$18,424 + $75,943
$94,367
2016
$1,677 (+0.7%)
$18,424 + $75,943
$94,367
2015
$1,665 (+1.3%)
$18,063 + $74,454
$92,517
2014
$1,643 (+1.3%)
$17,444 + $71,900
$89,344
2013
$1,622 (+7.5%)
$17,444 + $71,900
$89,344
2012
$1,510 (+2.0%)
$17,366 + $71,576
$88,942
2011
$1,481 (+2.8%)
$17,026 + $70,173
$87,199
2010
$1,440 (+1.4%)
$16,693 + $68,798
$85,491
2009
$1,420 (+6.3%)
$16,569 + $68,284
$84,853
2008
$1,336
$16,609 + $68,447
$85,056
Tax history for 9453 Alcosta Blvd
Year
Property tax
Land + Additions
Assessment*
2025
$2,034 (+2.0%)
$21,805 + $89,897
$111,702
2024
$1,995 (+2.3%)
$21,378 + $88,135
$109,513
2023
$1,951 (+0.6%)
$20,959 + $86,407
$107,366
2022
$1,938 (+1.7%)
$20,549 + $84,713
$105,262
2021
$1,907 (+1.3%)
$20,147 + $83,052
$103,199
2020
$1,883 (+2.0%)
$19,752 + $81,424
$101,176
2019
$1,846 (+3.7%)
$19,550 + $80,590
$100,140
2018
$1,781 (+3.8%)
$19,167 + $79,010
$98,177
2017
$1,716 (+2.3%)
$18,424 + $75,943
$94,367
2016
$1,677 (+0.7%)
$18,424 + $75,943
$94,367
2015
$1,665 (+1.3%)
$18,063 + $74,454
$92,517
2014
$1,643 (+1.3%)
$17,444 + $71,900
$89,344
2013
$1,622 (+7.5%)
$17,444 + $71,900
$89,344
2012
$1,510 (+2.0%)
$17,366 + $71,576
$88,942
2011
$1,481 (+2.8%)
$17,026 + $70,173
$87,199
2010
$1,440 (+1.4%)
$16,693 + $68,798
$85,491
2009
$1,420 (+6.3%)
$16,569 + $68,284
$84,853
2008
$1,336
$16,609 + $68,447
$85,056
*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
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
Nov 15, 2017 • Final
Furnace a/c - mechanical (residential)
HVAC
Oct 2, 2017 • Final
Miscellaneous - mechanical
HVAC
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 3008
Living Sq. Ft: 2,040
Ground Floor Sq. Ft: 1,152
Building Sq. Ft: 2,040
# of Stories: 2
Legal Description: TRACT 3008 LOT 57 EX MR
Parking & Garage Information
Garage/Parking Sq. Ft: 563
Lot Information
# of Buildings: 1
Land Sq. Ft: 10,450
Legal Lot Number: 57
Acres: 0.2399
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 2,040
Stories: 2.0
Lot Size: 10,450 square feet
Style: Single Family Residential
Year Built: 1965
Year Renovated: 1969
County: Contra Costa County
APN: 2103630113
Home facts updated by county records on Oct 10, 2026
Around this home
Schools
Walt Disney 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 • 1.3mi
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...