21042 Cornerstone Dr, Walnut, CA 91789
Property image
Property image
OFF MARKET

21042 Cornerstone Dr
Walnut, CA 91789

  • 4 Beds
  • 3.5 Baths
  • 1,760 sqft

$939,900

Trulia Estimate
as of Aug 21, 2026

$939,900

Trulia Estimate
as of Aug 21, 2026
  • 4 Beds
  • 3.5 Baths
  • 1,760 sqft

Home Highlights

Property Type
Apartment
Living Area
1,760 sqft
Price/Sqft
$534
Parking
Attached Garage

Local Information

  • Map ViewExplore the area around 21042 Cornerstone Dr.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

About this House

This beautifully designed 4-bedroom, 3.5-bath 3-story condo blends contemporary finishes, thoughtful functionality, and an unbeatable location within the award-winning Walnut Valley Unified School District. The first floor welcomes you with a full bedroom and bath, perfect for extended family, guests, or a dedicated home office. The main living area on the second floor features laminate flooring, an open-concept layout, and a spacious great room ideal for gatherings. The modern kitchen offers a generous island with sleek quartz counters, granite perimeter countertops, and under-cabinet lighting for a bright, elevated cooking experience. On the top floor, you'll find the remaining bedrooms, including a tranquil primary suite, along with a conveniently located laundry room. This community is designed for ease and comfort, offering a neighborhood park with greenbelt views, a playground, and a BBQ area, perfect for unwinding, hosting, or weekend fun. Just minutes from the 60 & 57 freeways and close to the Walnut/Industry Metrolink Station, commuting to Los Angeles, Orange County, and the surrounding business hubs is effortless. The home is also within walking distance to Suzanne Middle School and Walnut High School two of the district's highest-ranked and most desired campuses.

Owner pays for HOA, tenant is responsible for all utilities. No pets.
21042 Cornerstone Dr, Walnut, CA 91789 is a 4 bedroom, 4 bathroom, 1,760 sqft apartment. It last sold for $685,000 on Dec 7, 2018 (18,167% above the $3,750 asking price). More recently, it was listed as a rental in February 2026 with an asking price of $3,750 per month. That rental listing was removed on March 4, 2026. It is currently off market. The Trulia Estimate is $939,900, with a rent estimate of $3,936/month.

Home Details for 21042 Cornerstone Dr

Property Information

Property Type / Style
Property Type: Apartment

Rental Terms, Policies & Fees

Lease Term: 1 YearAvailable: now

Interior Features

Appliances & Utilities
DishwasherRefrigerator
Heating & Cooling
Air ConditioningCooling System: Central Air
Levels, Entrance, & Accessibility
Floors: Carpet, Hardwood, Tile

Exterior Features

Parking & Garage
Parking: Attached, On Site

Comparable Sales for 21042 Cornerstone Dr

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
20122 Candleflame Ct, Walnut, CA
2.26
Multi-Family Home
$1,588,168
01/09/26
1
1
300 sqft
23601 Golden Springs Dr #A-10, Diamond Bar, CA
2.34
Apartment
$331,000
07/07/26
2
2
949 sqft
23665 Golden Springs Dr #E-2, Diamond Bar, CA
2.34
Apartment
$320,000
08/29/25
2
2
949 sqft
1104 Cleghorn Dr #F, Diamond Bar, CA
2.58
Apartment
$638,500
06/17/26
2
1.5
1,048 sqft
2350 S Diamond Bar Blvd #L, Diamond Bar, CA
2.73
Apartment
$520,000
07/22/26
2
2
916 sqft
23617 Golden Springs Dr #K-1, Diamond Bar, CA
2.34
Apartment
$310,000
10/22/25
1
1
768 sqft
1521 Rose Ct, West Covina, CA
3.92
Apartment
$679,000
05/27/26
3
3
1,442 sqft
2145 E Aroma Dr #88, West Covina, CA
3.78
Apartment
$400,000
02/05/26
2
1
968 sqft
524 S Astell Ave, West Covina, CA
5.24
Apartment
$1,260,000
12/05/25
3
2
1,202 sqft
15909 Fellowship St, La Puente, CA
5.50
Multi-Family Home
$954,000
09/08/25
1
1
360 sqft
Home facts updated by county records

Nearby homes

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Around this home

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

  • 30 % 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

Price and Tax history

DateEventPrice
Mar 4, 2026
Source: Zillow Rentals
ListingRemoved
$3,750
Feb 18, 2026
Source: Zillow Rentals
Listed For Rent
$3,750
Feb 18, 2026
Source: CRMLS #PW26015815
ListingRemoved
$3,800
Jan 23, 2026
Source: CRMLS #PW26015815
Listed For Rent
$3,800
Nov 23, 2024
Source: CRMLS #PW24237086
ListingRemoved
$3,700

Frequently asked questions about 21042 Cornerstone Dr

  • What is 21042 Cornerstone Dr estimated to be worth?
    Trulia's estimated value for 21042 Cornerstone Dr in Walnut, CA is $939,900.
  • What is the price history for 21042 Cornerstone Dr?
    21042 Cornerstone Dr in Walnut, CA last sold for $685,000 in December 2018.
  • 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 21042 Cornerstone Dr have air conditioning?
    Yes, 21042 Cornerstone Dr in Walnut, CA has air conditioning.
  • Does 21042 Cornerstone Dr have parking?
    Yes, 21042 Cornerstone Dr in Walnut, CA has on-site parking.

Homes for rent near 21042 Cornerstone Dr

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Affordability

TIP:Try to keep your rent within a third of your gross household income. Learn why in our Renter's Guide.
For this property
PER YEAR
is the suggested income
Win over prospective landlords with your smart budgeting. As a good rule of thumb, ideally you would have at least three times your monthly rent in combined household income.
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