21010 Cornerstone Dr, Walnut, CA 91789
Property image
Property image
SOLD
MAR 27, 2026

21010 Cornerstone Dr
Walnut, CA 91789

  • 4 Beds
  • 3 Baths
  • 1,830 sqft

$677,000

Last Sold: Mar 27, 2026
$370/sqft
Est. Refi. Payment $4,175/mo*
Refinance Your Home

$677,000

Last Sold: Mar 27, 2026
$370/sqft
Est. Refi. Payment $4,175/mo*
Refinance Your Home
4 Beds
3 Baths
1,830 sqft

Local Information

  • Map ViewExplore the area around 21010 Cornerstone Dr.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Condo
Year Built
2018
Living Area
1,830 sqft
Price/Sqft
$370/sqft
Parking
Garage

About this House

Award winning walnut school district, built by Shea Home in 2018, located in Walnut's highly desirable Cornerstone Community. This full highly upgraded home is ready for you !This sought-after Tri level floor Plan Maximizes Every Inches Of Its square footage, with 3 bedrooms and 3 full & 1/2 baths, including first-floor bedroom & full bath . Very open floor plan. The open concept main level features and open & airy, fully upgraded kitchen with white cabinetry, custom tile backsplash, Quartz & Granite Counter oversized Island, Stainless steel appliances. Beautiful Flooring, Upgraded wood floor, recessed lighting . Two cars side by side attached garage. Within walking distance to middle and high schools. Closed to restaurants, shops and freeway.
21010 Cornerstone Dr, Walnut, CA 91789 is a 4 bedroom, 3 bathroom, 1,830 sqft condo built in 2018. It last sold for $677,000 on Mar 27, 2026. It is currently off market. The Trulia Estimate is $946,600, with a rent estimate of $4,050/month.

Home Details for 21010 Cornerstone Dr

Interior Features

Heating & Cooling
Heating: Forced AirAir ConditioningCooling System: CentralHeating Fuel: Forced Air
Interior Details
Types of Rooms: Walk In Closet, Family Room, Master Bath
Appliances & Utilities
DishwasherDryerMicrowaveRefrigeratorWasher
Levels, Entrance, & Accessibility
Floors: Carpet, Hardwood

Property Information

Year Built
Year Built: 2018
Property Type / Style
Property Type: Condo

Exterior Features

Parking & Garage
GarageParking Spaces: 2Parking: Garage Attached

Price & Status

Price
Price Per Sqft: $370/sqft

Community

Units in Building: 1

Lot Information

Lot Area: 0.40 acres

Price History for 21010 Cornerstone Dr

DatePriceEventSource
03/27/2026$677,000Sold
N/A
12/03/2021$847,000Sold
N/A
11/04/2021$799,800PendingRE/MAX International #TR21234934
11/04/2021$799,800ContingentCRMLS #TR21234934
10/25/2021$799,800Listed For SaleCRMLS #TR21234934
12/16/2020$790,000Sold
N/A
11/06/2020$765,000PendingAgent Provided
11/05/2020$765,000Listed For SaleAgent Provided
10/25/2019$765,000ListingRemovedAgent Provided
09/11/2019$765,000PriceChange
Agent Provided
08/28/2019$699,900Listed For SaleAgent Provided
10/06/2017$737,000Sold
N/A

Market trends in Walnut

Last updated June 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
75
16MoM
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Property Tax and Assessment

Year2025
Tax$11,140
Assessment$898,841
Home facts updated by county records

Comparable Sales for 21010 Cornerstone Dr

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
21002 Cornerstone Dr, Walnut, CA
0.00
Condo
$971,000
04/02/26
4
3
1,800
20956 Cornerstone Dr, Walnut, CA
0.05
Condo
$888,000
10/16/25
4
3
1,760
20916 Jade Dr, Walnut, CA
0.11
Condo
$915,000
09/04/25
4
3.5
1,760
715 Windwood Dr, Diamond Bar, CA
0.79
Condo
$545,000
08/12/25
2
1
882
860 Windwood Dr, Diamond Bar, CA
0.94
Condo
$180,000
09/10/25
3
2
1,136
810 Silver Fir Rd, Diamond Bar, CA
0.84
Condo
$495,000
09/02/25
2
1
878
720 Windwood Dr, Diamond Bar, CA
0.82
Condo
$485,555
06/26/26
2
1
882
607 Alder Ln, Diamond Bar, CA
0.77
Condo
$400,000
08/26/25
2
3
1,368
838 Windwood Dr, Diamond Bar, CA
0.96
Condo
$499,999
11/07/25
2
1
878

Nearby homes

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Assigned Schools

These are the assigned schools for 21010 Cornerstone Dr.
View nearby schools on GreatSchools
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

What Locals Say about Walnut

At least 124 Trulia users voted on each feature.

  • 88 % Say there are sidewalks

  • 88 % Say parking is easy

  • 81 % Say car is needed

  • 81 % Say yards are well-kept

  • 80 % Say it's dog friendly

  • 75 % Say it's quiet

  • 72 % Say streets are well-lit

  • 68 % Say people would walk alone at night

  • 63 % Say it's walkable to grocery stores

  • 63 % Say there's holiday spirit

  • 62 % Say there's wildlife

  • 62 % Say they plan to stay for at least 5 years

  • 47 % Say neighbors are friendly

  • 44 % Say it's walkable to restaurants

  • 44 % Say kids play outside

  • 29 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • Nicholas R.
    "Very quiet neighborhood, not too much traffic, friendly neighbors. very nice and clean parks, that are close by. "
    4
    Flag
  • Angie.duran323
    "There’re lots of trails and long sidewalks in neighborhoods you can walk your dogs along. Sometimes all the dogs start barking at random times of day which is the only annoyance but other than that it’s great!"
    3
    Flag
  • T
    "City Walnut is known to have one the the best hiking trail in Southern California for adults, kids and pets"
    5
    Flag
  • Ronald G.
    "Public transportation is not very good. Especially for seniors living in the city. Stores are not really in walking distance and if you carry items, you will need to stop several times before getting home."
    1
    Flag
  • Ronald G.
    "The neighborhood is nice and people a generally nice. Easy to get around to stores and small shopping in the areas. If you want real shopping you have to leave the city."
    3
    Flag
  • sme2101
    "There are many families in our neighborhood, we have great parks, everyone is friendly and it’s a safe town"
    1
    Flag
  • Leslie a.
    "I lived here for about 6 years and I really enjoy the nature feel, the birds singing and the trails to walk on."
    2
    Flag
  • Fermin L.
    "I have lived here for the past 7 years and is a safe quiet neighborhood, great parks and city wide activities for children and adults, lots of trails to walk."
    1
    Flag
  • Needeposit
    "Living in the area for the last 20 years and in the same home for 12 years. Very safe area and one of the best school systems."
    1
    Flag
  • Ray
    "Great walking trails, very good schools and parks."
    1
    Flag

LGBTQ Local Legal Protections

Apartments for Rent

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Explore by feature - Pet Friendly

10 pet-friendly rentals in Walnut, CA

Explore by feature - Garage

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Explore by feature - Air Conditioning

20 rentals with air conditioning in Walnut, CA

Explore by feature - Pool

Explore by feature - Washer/dryer

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Explore by feature - Outdoor Space

13 rentals with an outdoor space in Walnut, CA

Homes for sale near 21010 Cornerstone Dr

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Off Market Homes Near 21010 Cornerstone Dr

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Frequently asked questions about 21010 Cornerstone Dr

  • What is 21010 Cornerstone Dr estimated to be worth?
    Trulia's estimated value for 21010 Cornerstone Dr in Walnut, CA is $946,600.
  • What is the price history for 21010 Cornerstone Dr?
    21010 Cornerstone Dr in Walnut, CA last sold for $677,000 in March 2026.
  • Is Walnut a buyer's or seller's market?
    Walnut is currently a seller's market, based on recent for-sale activity.
  • What do residents say about Walnut?
    Residents describe Walnut, CA as pedestrian-friendly, easy to park in, and well-kept. See recently sold homes in Walnut, CA.
  • Does 21010 Cornerstone Dr have air conditioning?
    Yes, 21010 Cornerstone Dr in Walnut, CA has air conditioning.
  • Does 21010 Cornerstone Dr have laundry facilities?
    Yes, 21010 Cornerstone Dr in Walnut, CA has in-unit laundry.