New44
$948,000
4 bd · 3 ba · 1,830 sqft
21010 Cornerstone, Walnut, CA
AJ Hoover · Seven Gables Real Estate · on 2 MLSs
Est. $7,864/mo$663/sqft · 1 day on Realty
2026-10-17T20:30:00Z – 2026-10-17T23:00:00Z
3
Beds
3
Baths
1,811
Sqft
1988
Built
Welcome to this beautifully refreshed two-story home in the desirable Walnut Ridge community of Walnut. Situated on an expansive approximately 0.31-acre lot, this home features 3 bedrooms, 2.5 bathrooms, approximately 1,811 sq. ft. of living space, a 3-car attached garage, and an impressive 26-PANEL SOLAR SYSTEM — FULLY PAID OFF! NO SOLAR PAYMENT & NO ELECTRICITY PAYMENT! Fresh interior paint creates a bright and inviting feel throughout. The open living and dining areas feature soaring cathedral ceilings and abundant natural light. The kitchen offers granite countertops and recessed lighting and opens to the family room with a cozy fireplace. Upstairs, the primary suite features a spacious bath with a separate soaking tub and shower. The generous backyard is perfect for Southern California living, complete with a private pool and spa, built-in BBQ, and mature landscaping. Located within the highly regarded Walnut Valley Unified School District, with convenient access to schools, parks, shopping, and major freeways. A wonderful opportunity featuring a spacious lot, private pool and spa, 3-car garage, and 26 fully paid-off solar panels!
Listing record
Choose a source to show its complete, unblended listing record.
Showing California Regional Multiple Listing Service (CRMLS)
California Regional Multiple Listing Service (CRMLS) · Listing WS26223791
Courtesy of Real Brokerage Technologies
Listing agent
XIANGHUI ZHOU
(626) 782-2098
San Diego MLS · Listing WS26223791
Courtesy of Real Brokerage Technologies
Listing agent
XIANGHUI ZHOU
(626) 782-2098
$240,000
Estimated monthly payment
$7,864/mo
Loan amount $960,000. Estimate only — your actual rate and payment depend on credit, location, and lender.
California Regional Multiple Listing Service (CRMLS)
San Diego MLS
The MLS (CLAW)This content last refreshed on 2026-10-15 22:59:29 UTC. Some 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 Reduced75$1,299,000
4 bd · 3 ba · 2,265 sqft
20400 Lake Canyon Drive, Walnut, CA
Adela Olivares · New Century Realtors
66$1,070,000
3 bd · 2 ba · 1,487 sqft
1215 Vassar Ln, Walnut, CA
Universal Elite Realty · on 3 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
26$980,000
3 bd · 2 ba · 1,427 sqft
525 Jamon Lane, Walnut, CA
Bill Scalio · Century 21 Masters · on 2 MLSs
21$895,000
3 bd · 2 ba · 1,332 sqft
20179 Barnard Avenue, Walnut, CA
Shirley Tang · 888 Realty · on 2 MLSs





Within 2 miles of this home: 33+ restaurants and cafés, 6 grocery stores, 16 parks and green spaces, and 7+ transit stops.
Place data from OpenStreetMap.
Chick-fil-A
Valley Boulevard
Cold Stone Creamery
Grand Avenue
Starbucks
Grand Avenue
El Pollo Loco
Mexican restaurant
Applebee's
American restaurant
In-N-Out Burger
East Valley Boulevard
McDonald's
Grand Avenue
Panera Bread
Valley Boulevard
ALDI
Valley Boulevard
Vons
North Lemon Avenue
Diamond Fresh Farmers Market
Golden Springs Drive
Hannam Market World
Golden Springs Drive
Sprouts Farmers Market
Diamond Bar Boulevard
Smart & Final Extra!
South Diamond Bar Blvd
Walnut Ridge Park
Suzanne Park
Washington Park
Cottonwood Lane
Snow Creek Park
Lemon Creek Bicentennial Park
Mt. SAC Wildlife Sanctuary
Diamond Bar Pony Baseball Fields
Sunset Crossing Road
Arroyo Park
Foothill Transit 194
Foothill Transit 289
Metro 194
Industry
Foothill Transit 194, 289
Foothill Transit 482
Foothill Transit 482, 853, 854
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: 0.1 mi northeast.
| Device type | Within ½ mi | Within 1 mi |
|---|---|---|
| License-plate readers | 2 | 4 |
| of which Flock Safety | 2 | 4 |
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.
School ratings (A+ to F) from HJN community data.
Walnut High School
9-12 · Regular · Walnut Valley Unified School District
2,148 students · 23.2:1 student–teacher
Suzanne Middle School
6-8 · Regular · Walnut Valley Unified School District
1,190 students · 26.3:1 student–teacher
The Cross School of Education
PK-KG · Early Childhood Program/Child Care Center
10 students · 2.0:1 student–teacher
Allais School
2-11 · Regular
48 students · 6.2:1 student–teacher
Vejar Elementary School
KG-5 · Regular · Walnut Valley Unified School District
631 students · 23.0:1 student–teacher
Ron Hockwalt Academies (Continuation)
9-12 · Alternative/Other · Walnut Valley Unified School District
36 students · 5.0:1 student–teacher
Discovery World Montessori
PK-5 · Montessori
16 students · 5.3:1 student–teacher
Walnut Elementary School
KG-5 · Regular · Walnut Valley Unified School District
706 students · 25.9:1 student–teacher