You could be home now. This expanded San Ramon home is close to everything yet surprisingly secluded. It is situated just a block from an elementary school and walkable to the middle and high schools. The 4 bedrooms and 3 bathrooms are complemented by a formal living room, family room and a finished bonus room. The beautifully remodeled kitchen has solid surface countertops and stainless steel appliances including a 5 burner gas range. The fresh paint inside and outside make the house ready to be called home straight away. The two zone heater and air conditioner allow the upstairs to stay cool in the summer and the downstairs to stay warm in the winter. Its expanding private backyard includes a finished she-shed/man cave, a relaxing patio, lush grass/garden areas, and a utility shed. Now you really can be home.
Single-familyProperty Type
1969Year Built
0.39 acresLot Size
$751Est. Price/Sq.Ft.
2 car garageParking
Listed by Adam Hamalian•DRE #01917597• Dudum Real Estate Group
Listed by Sherry Hutchens•DRE #01320608• Dudum Real Estate Group
bridgeMLS, Bay East AOR, or Contra Costa AOR #40865800
Jun 20, 2019
Sold
$1,080,000
$508/sq ft
May 21, 2019
Pending
—
May 15, 2019
Listed
$1,050,000
$494/sq ft
Public Records
May 2, 1973
Sold
$32,000
$15/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$13,892 (+2.0%)
$796,478 + $432,371
$1,228,849
2024
$13,617 (+1.6%)
$780,861 + $423,894
$1,204,755
2023
$13,405 (+0.7%)
$765,550 + $415,583
$1,181,133
2022
$13,309 (+2.0%)
$750,540 + $407,435
$1,157,975
2021
$13,043 (+0.6%)
$735,824 + $399,447
$1,135,271
2020
$12,963 (+408.3%)
$721,397 + $391,615
$1,113,012
2019
$2,550 (+3.8%)
$714,000 + $387,600
$1,101,600
2018
$2,457 (+3.8%)
$14,997 + $153,293
$168,290
2017
$2,366 (+2.0%)
$14,415 + $147,342
$161,757
2016
$2,320 (+0.9%)
$14,415 + $147,342
$161,757
2015
$2,300 (+1.3%)
$14,133 + $144,453
$158,586
2014
$2,270 (+1.2%)
$13,649 + $139,497
$153,146
2013
$2,243 (+2.5%)
$13,649 + $139,497
$153,146
2012
$2,188 (+1.9%)
$13,588 + $138,867
$152,455
2011
$2,147 (+2.2%)
$13,322 + $136,145
$149,467
2010
$2,100 (+0.9%)
$13,061 + $133,476
$146,537
2009
$2,081 (+5.2%)
$12,964 + $132,479
$145,443
2008
$1,978
$12,995 + $132,794
$145,789
Tax history for 12 Ona Ct
Year
Property tax
Land + Additions
Assessment*
2025
$13,892 (+2.0%)
$796,478 + $432,371
$1,228,849
2024
$13,617 (+1.6%)
$780,861 + $423,894
$1,204,755
2023
$13,405 (+0.7%)
$765,550 + $415,583
$1,181,133
2022
$13,309 (+2.0%)
$750,540 + $407,435
$1,157,975
2021
$13,043 (+0.6%)
$735,824 + $399,447
$1,135,271
2020
$12,963 (+408.3%)
$721,397 + $391,615
$1,113,012
2019
$2,550 (+3.8%)
$714,000 + $387,600
$1,101,600
2018
$2,457 (+3.8%)
$14,997 + $153,293
$168,290
2017
$2,366 (+2.0%)
$14,415 + $147,342
$161,757
2016
$2,320 (+0.9%)
$14,415 + $147,342
$161,757
2015
$2,300 (+1.3%)
$14,133 + $144,453
$158,586
2014
$2,270 (+1.2%)
$13,649 + $139,497
$153,146
2013
$2,243 (+2.5%)
$13,649 + $139,497
$153,146
2012
$2,188 (+1.9%)
$13,588 + $138,867
$152,455
2011
$2,147 (+2.2%)
$13,322 + $136,145
$149,467
2010
$2,100 (+0.9%)
$13,061 + $133,476
$146,537
2009
$2,081 (+5.2%)
$12,964 + $132,479
$145,443
2008
$1,978
$12,995 + $132,794
$145,789
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Zoning
Permits
Beds
4
Baths
3
Stories
2
Lot width
—
Lot depth
—
Lot size
0.39 Acres
Year renovated
1995
Sq. Ft.
2,097
Year built
1969
Style
Single Family Residential
County
Contra Costa County
APN
2121110262
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 13, 2026.
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
Dec 11, 2023 • Final
Miscellaneous - re-roof
Roofing
Nov 17, 2023 • Final
Photovoltaic - electrical
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.
Street Level Features: 1 Bedroom, 1 Bath, Main Entry
Fireplaces Total: 1
Has Fireplace
Flooring: Carpet, Wood
Room Information
Kitchen Features: 220 Volt Outlet,Counter - Solid Surface,Dishwasher,Electric Range/Cooktop,Microwave,Refrigerator
Rooms Total: 10
Fireplace Features: Living Room
Exterior
Building Information
Construction Materials: Stucco
Building Area Total: 2,127
Exterior Features
Patio And Porch Features: Patio
Exterior Features: Back Yard, Front Yard, Side Yard, Sprinklers Automatic, Sprinklers Back, Storage
Fencing: Fenced
Roof: Shingle
Property Information
Living Area: 2127
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1969
Lot Information
Other Structures: Shed(s)
Lot Size Square Feet: 17050
Lot Size Area: 0.39
Lot Size Units: Acres
Lot Size Acres: 0.39
Lot Features: Court, Level
Utilities
Utility Information
Water Source: Public
Electric: 220 Volts in Kitchen
Sewer: Public Sewer
Heating & Cooling
Has Heating
Heating: Zoned
Cooling: Zoned
Public facts
Beds: 4
Baths: 3.0
Sq. Ft.: 2,097
Stories: 2.0
Lot Size: 0.39 acres
Style: Single Family Residential
Year Built: 1969
Year Renovated: 1995
County: Contra Costa County
APN: 2121110262
Home facts updated by county records on Jul 13, 2026
Around this home
Schools
Neil A. Armstrong Elementary School
Public K-5 • Assigned • 0.2mi
10/10
Pine Valley Middle School
Public 6-8 • Assigned • 0.6mi
10/10
California High School
Public 9-12 • Assigned • 0.4mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
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Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2019. This data may not match public records. Learn more.