520 Catanio Ct is a 1,672 square foot house on a 9,920 square foot lot with 3 bedrooms and 2 bathrooms. - it last sold on February 25, 1985 for $157,000. Based on Redfin's San Ramon data, we estimate the home's value is $1,271,831.
Single-familyProperty Type
1973Year Built
9,920 sq ftLot Size
$761Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,271,831
$1.1M since sold in February 1985$23K since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 23.5% lower than the average sale price ($1.66M) 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 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
Jan 6, 2015 • Final
Furnace a/c - mechanical (residential)
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
Living Sq. Ft: 1,672
Ground Floor Sq. Ft: 1,672
Building Sq. Ft: 1,672
# of Stories: 1
Legal Description: TRACT 4235 LOT 23
Parking & Garage Information
Garage/Parking Sq. Ft: 462
Lot Information
# of Buildings: 1
Land Sq. Ft: 9,920
Legal Lot Number: 23
Acres: 0.2277
County Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 1,672
Stories: 1.0
Lot Size: 9,920 square feet
Style: Single Family Residential
Year Built: 1973
Year Renovated: 1974
County: Contra Costa County
APN: 2092500087
Home facts updated by county records on Oct 30, 2026
Around this home
Schools
K - 12
Preschool & daycare
Twin Creeks Elementary School
Public K-5 • Assigned • 0.2mi
10/10
Iron Horse Middle School
Public 6-8 • Assigned • 1.6mi
10/10
California High School
Public 9-12 • Assigned • 2.8mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
The San Ramon housing market remains competitive with median sale prices hovering around $1.45 million, though distinct neighborhood trends are emerging as older, centrally located areas appreciate while newer developments like Dougherty Valley...
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.