New44
$948,000
4 bd · 3 ba · 1,830 sqft
21010 Cornerstone, Walnut, CA
AJ Hoover · Seven Gables Real Estate · on 2 MLSs

No listing photos
4
Beds
3
Baths
2,304
Sqft
1976
Year built
Range $1,113,680 – $1,235,888 · as of August 30, 2026
ATTOM automated valuation model · 54 published estimates over 6.7 years · shaded band is the model's own published low-to-high range
Highest reading $1,330,250 in March 2024; lowest $810,000 in March 2020. The vertical scale starts at the series' own low, not at zero — it is drawn to show movement, not absolute size.
$234,957
Estimated monthly payment
$7,701/mo
Loan amount $939,827. Estimate only — your actual rate and payment depend on credit, location, and lender.
2026 roll
California Regional Multiple Listing Service (CRMLS)
San Diego MLSSome properties which appear for sale on this web site may subsequently have sold or may no longer be available.
New44
$948,000
4 bd · 3 ba · 1,830 sqft
21010 Cornerstone, Walnut, CA
AJ Hoover · Seven Gables Real Estate · on 2 MLSs
Price Reduced54$1,350,000
5 bd · 3 ba · 2,802 sqft
20412 Lake Canyon, Walnut, CA
Ellis Younger · T.N.G. Real Estate Consultants · on 2 MLSs
New31$1,200,000
3 bd · 3 ba · 1,811 sqft
21138 Valleyview, Walnut, CA
XIANGHUI ZHOU · Real Brokerage Technologies · on 2 MLSs
66$1,070,000
3 bd · 2 ba · 1,487 sqft
1215 Vassar Lane, Walnut, CA
Li Li · Universal Elite Realty · on 2 MLSs
New9$1,119,880
3 bd · 3 ba · 1,570 sqft
208 Siena Court, Walnut, CA
Kyle Hayes · CBC Sales Corporation · on 2 MLSs
Price Reduced44$1,150,000
5 bd · 3 ba · 2,304 sqft
1313 Fairlance, Diamond Bar, CA
Melitta Johnson · Compass · on 3 MLSs
School ratings (A+ to F) from HJN community data.
South Pointe Middle School
6-8 · Regular · Walnut Valley Unified School District
979 students · 25.6:1 student–teacher
Walnut Elementary School
KG-5 · Regular · Walnut Valley Unified School District
706 students · 25.9:1 student–teacher
Tzu Chi Elementary Satoa
PK-5 · Regular
65 students · 7.7:1 student–teacher





Within 2 miles of this home: 36+ restaurants and cafés, 7 grocery stores, 11 parks and green spaces, and 5+ transit stops.
Place data from OpenStreetMap.
BBQ Stop AYCE
Golden Springs Drive
Atoyubu
Golden Springs Dr
Mr. Dragon Noodle House
Golden Springs Drive
Colima Burgers
American restaurant
Cali Noodles & Grill
Golden Springs Drive
McDonald's
Colima Road
Delicious Food Corner
Golden Springs Drive
IL Poom
Korean restaurant · Golden Springs Drive
Stater Bros. Markets
Colima Road
168 Market
Colima Road
Hannam Market World
Golden Springs Drive
Diamond Fresh Farmers Market
Golden Springs Drive
H Mart
Asian restaurant · Diamond Bar Boulevard
99 Ranch Market
Asian restaurant
Vons
North Lemon Avenue
Starshine Park
Starshine Road
Ronald Reagan Park
Rowland Heights Park
Washington Park
Cottonwood Lane
Heritage Park
Lemon Creek Bicentennial Park
Friendship Park
Maple Hill Park
Foothill Transit 482
Foothill Transit 194
Industry
Foothill Transit 482, 853, 854
Foothil Transit 482
Rings at ½ mile and 1 mile. Basemap © OpenMapTiles © OpenStreetMap contributors.
Open the Walnut camera map2 license-plate readers mapped within ½ mile of this home, both identified as Flock Safety devices. Nearest: 0.4 mi northeast.
| Device type | Within ½ mi | Within 1 mi |
|---|---|---|
| License-plate readers | 2 | 11 |
| of which Flock Safety | 2 | 11 |
Community-reported via OpenStreetMap; may be incomplete. Data as of . © OpenStreetMap contributors (ODbL)
License-plate readers (ALPR) are fixed cameras that photograph passing vehicles and read their plates. Records are typically shared with the agency or association that operates the camera.
Flock Safety is a company whose plate-reader cameras are used by police departments, cities, HOAs and businesses. Its devices are usually solar-powered and pole-mounted.