21010 Cornerstone Walnut CA 91789 | MLS #PW26223459
Welcome to 21010 Cornerstone, nestled in a highly sought-after neighborhood in Walnut. This spacious 4-bedroom, 3-bathroom home offers a wonderful blend of comfort, functionality, and inviting living spaces, making it an ideal place to call home. The thoughtfully designed interior features an updated kitchen that opens seamlessly into a spacious living room, creating an open and welcoming atmosphere perfect for entertaining guests or enjoying everyday living. The expansive main living area provides plenty of room to gather with family and friends, while a beautiful private balcony just off the living space offers the perfect spot to enjoy the fresh air, unwind, and relax. The generously sized primary suite serves as a comfortable retreat, complete with a walk-in closet and an en-suite bathroom featuring a dual-sink vanity and walk-in shower. Additional conveniences include a dedicated laundry room and an attached two-car garage, providing practical storage and everyday ease. Beyond the home itself, residents can enjoy a desirable community lifestyle with access to a swimming pool, neighborhood park, and BBQ area—ideal for outdoor recreation, gatherings, and making lasting memories. Located within a community surrounded by award-winning schools, this property offers an appealing combination of space, convenience, and lifestyle in the heart of Walnut. With its inviting layout, desirable amenities, and sought-after location, 21010 Cornerstone presents a wonderful opportunity to enjoy comfortable living in a welcoming community.
Property Details
Price:
$948,000
MLS #:
PW26223459
Status:
Active
Beds:
4
Baths:
3
Type:
Condo
Subtype:
Condominium
Neighborhood:
668walnut
Listed Date:
Oct 18, 2026
Finished Sq Ft:
1,830
Lot Size:
17,474 sqft / 0.40 acres (approx)
Year Built:
2018
See this Listing
Schools
School District:
Walnut Valley Unified
Interior
Appliances
Microwave, Refrigerator, Gas Range, Dishwasher
Bathrooms
3 Full Bathrooms
Cooling
Central Air
Flooring
Laminate
Heating
Central
Interior Features
2 Staircases, Stone Counters, Granite Counters
Laundry Features
Inside, Laundry Room, Washer Included, Dryer Included
Levels
Three Or More, Two
Main Level Bathrooms
1
Main Level Bedrooms
1
Exterior
Association Amenities
Playground, Dog Park, Barbecue, Picnic Area
Attached Garage YN
1
Common Walls
2+ Common Walls
Community Features
Gutters, Dog Park, Sidewalks, Park
Construction Materials
Stucco
Covered Spaces
2
Exterior Features
Rain Gutters
Garage Spaces
2
Parking Features
Garage
Parking Spots
2
Parking Total
2
Patio And Porch Features
Deck
Roof
Tile
Spa Features
Association
Stories
3
View
Neighborhood
Window Features
Double Pane Windows
Financial
HOA Fee
$306
HOA Fee Frequency
Monthly
HOA Name
Cornerstone Homeowners Association
HOA Phone
7142852626
Map
Community
- Address21010 Cornerstone Walnut CA
- CityWalnut
- CountyLos Angeles
- Zip Code91789
Market Summary
Property Summary
- 21010 Cornerstone Walnut CA is a Condo for sale in Walnut, CA, 91789. It is listed for $948,000 and features 4 beds, 3 baths, and has approximately 1,830 square feet of living space, and was originally constructed in 2018. The current price per square foot is $518. The average price per square foot for Condo listings in Walnut is $489. The average listing price for Condo in Walnut is $544,391. To schedule a showing of MLS#pw26223459 at 21010 Cornerstone in Walnut, CA, contact your Compass agent at 310.409.7242.
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Courtesy of Seven Gables Real Estate. Disclaimer: All data relating to real estate for sale on this page comes from the Broker Reciprocity (BR) of the California Regional Multiple Listing Service. Detailed information about real estate listings held by brokerage firms other than Compass include the name of the listing broker. Neither the listing company nor Compass shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. The Broker providing this data believes it to be correct, but advises interested parties to confirm any item before relying on it in a purchase decision. Copyright 2026. California Regional Multiple Listing Service. All rights reserved.21010 Cornerstone
Walnut, CA
