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Every listing shows your estimated rebate.

The green number on each home is what could come back to you: the buyer-broker fee (typically 2 to 3%) minus our flat $9,750. No other search shows you this, because no other brokerage gives it back.

At a glance

21010 Cornerstone, Walnut, CA, 91789

$948,000·3 bd·3 ba·San Diego MLS #PW26223459

Estimated Arrivva buyer rebate$9,000 to $19,000

Every completed rebate is published: see all 255 closings.

Listing data from San Diego MLS. Rebate estimate calculated by Arrivva.

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$948,000
6 Days On Site

21010 Cornerstone
Walnut, CA 91789

For Sale|Condominium|Active
4
Beds
3
Total Baths
3
Full Baths
1,830
SqFt
$518
/SqFt
2018
Built
County:
Los Angeles
Listed by AJ Hoover of Seven Gables Real Estate ajh@sevengables.com
Call Now: (408) 868-2620
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(408) 868-2620
21010 Cornerstone21010 Cornerstone21010 Cornerstone21010 Cornerstone
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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 areaideal 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.

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Listing Snapshot
Price 
$948,000
Days On Site 
6 Days
Bedrooms 
4
Inside Area (SqFt) 
1,830 sqft
Total Baths 
3
Full Baths 
3
Partial Baths 
N/A
Lot Size 
0.4011 Acres
Year Built 
2018
MLS Number 
PW26223459
Status 
Active
Property Tax 
N/A
HOA/Condo/Coop Fees 
$306 monthly
Sq Ft Source 
N/A
Friends & Family
Recent Activity
yesterdayListing updated with changes from the MLS
6 days agoListing first seen on site
General Features
Garage 
Yes
Garage Spaces 
2
Number Of Stories 
3
Parking 
Garage
Parking Spaces 
2
Property Sub Type 
Condominium
Sewer 
Public Sewer
Special Circumstances 
Standard
SqFt Total 
1830
Water Source 
Public
Interior Features
Appliances 
DishwasherDryerMicrowaveRefrigeratorWasherGas Range
Cooling 
Central Air
Flooring 
Laminate
Heating 
Forced Air
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Exterior Features
Construction Details 
Stucco
Patio And Porch 
Deck
Pool Features 
Community
View 
Neighborhood
Waterview 
Neighborhood
Community Features
Association Amenities 
Picnic AreaPlaygroundBarbecue
Association Fee 
$306.0
Association Fee Frequency 
Monthly
Community Features 
Sidewalks
Financing Terms Available 
CashConventional
Listed by AJ Hoover of Seven Gables Real Estate ajh@sevengables.com



This information is deemed reliable but not guaranteed. You should rely on this information only to decide whether or not to further investigate a particular property. BEFORE MAKING ANY OTHER DECISION, YOU SHOULD PERSONALLY INVESTIGATE THE FACTS (e.g. square footage and lot size) with the assistance of an appropriate professional. You may use this information only to identify properties you may be interested in investigating further. All uses except for personal, non-commercial use in accordance with the foregoing purpose are prohibited. Redistribution or copying of this information, any photographs or video tours is strictly prohibited. This information is derived from the Internet Data Exchange (IDX) service provided by San Diego MLS®. Displayed property listings may be held by a brokerage firm other than the broker and/or agent responsible for this display. The information and any photographs and video tours and the compilation from which they are derived is protected by copyright. Copyright © 2026 San Diego MLS®.

Last checked 2026

Neighborhood & Commute
Source: Walkscore
Disclosure: Community information and market data powered by Constellation Data Labs. Information is deemed reliable but not guaranteed.
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*Estimate only. Actual rebate may vary based on final price, lender requirements, MLS rules, and broker policies.

Questions about this listing

How much could a buyer get back on 21010 Cornerstone, Walnut, CA, 91789?
Arrivva estimates a buyer rebate of $9,000 to $19,000 on this listing. The buyer-broker fee, typically 2 to 3% of the price, goes back to you minus Arrivva's flat $9,750 fee. Every completed rebate is published on the Arrivva results page. See every completed closing
How do I schedule a tour of 21010 Cornerstone, Walnut, CA, 91789?
Set up a quick chat with Arrivva by phone or video. The team confirms showing availability fast, tours the home with you, and walks you through offer strategy and the rebate math before you commit to anything. Set up a time to talk

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