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BG

21010 Cornerstone

Walnut, CA 91789

$948,000 $518 / sqft Est. $4,794/mo

4
Beds
3
Baths
1,830
Sq Ft

Active 10 days on market

Listed By AJ HooverDRE #02040196

Seven Gables Real Estate

ajh@sevengables.com

Your inquiry will go to Brenda Geraci, who is not the listing agent for this property.

Lot Size
17,474 sqft
Year Built
2018
Property Type
Residential
Property Subtype
Condominium
Levels
Two, Three Or More
Stories
2
Garage Spaces
2
Pool
No
View
Yes
HOA
Yes
Days on Market
10 days
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.

Open House

  • Saturday, October 24 · 9:00 AM – 11:00 AM

Estimate a monthly payment

—/mo

Principal and interest only. Property taxes, insurance and any HOA dues are not included and will increase this amount.

Estimates only, for your own planning. Not a loan offer, a pre-qualification, or a quote from any lender.

Features

Interior Features

Interior
  • Separate Formal Dining Room
  • Eat In Kitchen
  • Granite Counters
  • Multiple Staircases
  • Stone Counters
  • Entrance Foyer
  • Walk In Closets
Appliances
  • Dishwasher
  • Gas Range
  • Microwave
  • Refrigerator
  • Dryer
  • Washer
Cooling
  • Central Air
Heating
  • Central
Flooring
  • Laminate
Laundry
  • Inside
  • Laundry Room

Exterior Features

Pool
  • Community
View
  • Neighborhood
Parking
  • Garage
Roof
  • Tile

Market insights

Computed from CRMLS data for Walnut.

Property history

No prior MLS sale records.

Based on information from California Regional Multiple Listing Service, Inc. as of October 24, 2026 at 3:30 PM PDT and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Any amount of compensation or commission stated is made only to participants of CRMLS or an MLS that has entered into a datashare agreement with CRMLS.

Where it is