12261 Alcosta Blvd is a 2,448 square foot house on a 10,000 square foot lot with 4 bedrooms and 3 bathrooms. - it last sold on September 26, 1978 for $114,500. Based on Redfin's San Ramon data, we estimate the home's value is $1,568,571.
Single-familyProperty Type
1978Year Built
10,000 sq ftLot Size
$641Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,568,571
$1.5M since sold in September 1978$4,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 14.5% lower than the average sale price ($1.83M) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
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
Property details
Interior
Room Information
# of Rooms: 10
Exterior
Property Information
Living Sq. Ft: 2,448
Ground Floor Sq. Ft: 1,364
Building Sq. Ft: 2,448
# of Stories: 2
Legal Description: T04477 L0038 B EX MR
Parking & Garage Information
Garage/Parking Sq. Ft: 730
Lot Information
# of Buildings: 1
Land Sq. Ft: 10,000
Legal Lot Number: 38
Acres: 0.2296
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 2,448
Stories: 2.0
Lot Size: 10,000 square feet
Style: Single Family Residential
Year Built: 1978
Year Renovated: 1989
County: Contra Costa County
APN: 2123510071
Home facts updated by county records on Oct 10, 2026
Around this home
Schools
Montevideo Elementary School
Public K-5 • Assigned • 0.5mi
9/10
Iron Horse Middle School
Public 6-8 • Assigned • 1.4mi
10/10
California High School
Public 9-12 • Assigned • 0.7mi
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...