21000 Cornerstone Dr, Walnut, CA 91789
Property image
Property image
OFF MARKET

$922,500

Trulia Estimate
as of Oct 19, 2026
  • 4 Beds
  • 3.5 Baths
  • 1,830 sqft

21000 Cornerstone Dr, Walnut, CA 91789

Home Highlights

Townhouse
1,830 sqft
$504/sqft
Attached Garage

Local Information

  • Map ViewExplore the area around 21000 Cornerstone Dr.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

About this House

What's unique:Attached two-car garageLarge center islandAmple cabinetryOpen-concept main levelFreshly painted throughoutDining space
Welcome to 21000 Cornerstone Drive, a spacious three-story townhome located in the highly desirable Cornerstone community of Walnut. This well-maintained home offers 4 bedrooms and 3.5 bathrooms, including two private bedroom suites that provide flexibility for guests, multigenerational living, or a home office. The open-concept main level features a bright living area, dining space, and a functional kitchen with granite countertops, a large center island, ample cabinetry, and stainless steel appliances. Freshly painted throughout, the home offers a clean, move-in-ready living environment. Additional features include wood flooring in the main living areas, in-unit laundry, central air conditioning, and an attached two-car garage. Enjoy the convenience of being within walking distance to Walnut High School and Suzanne Middle School, both part of the award-winning Walnut Valley Unified School District. Community amenities include parks, playgrounds, BBQ areas, and beautifully maintained green spaces. Conveniently located near shopping, dining, and major freeways. Move-in ready and available for immediate occupancy.

Tenant pays all utilities, trash, and sewer. Landlord covers HOA fee includes maintenance of common areas.
21000 Cornerstone Dr, Walnut, CA 91789 is a 4 bedroom, 4 bathroom, 1,830 sqft townhouse. It last sold for $720,000 on Aug 27, 2019 (17,043% above the $4,200 asking price). More recently, it was listed as a rental in June 2026 with an asking price of $4,200 per month. That rental listing was removed on July 4, 2026. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $922,500, with a rent estimate of $4,083/month.

Home Details for 21000 Cornerstone Dr

Interior Features

Heating & Cooling
Heating: Forced AirAir ConditioningCooling System: Central AirHeating Fuel: Forced Air
Appliances & Utilities
DishwasherMicrowave
Levels, Entrance, & Accessibility
Floors: Carpet, Hardwood, Tile

Property Information

Property Type / Style
Property Type: Townhouse

Rental Terms, Policies & Fees

Lease Term: 1 YearAvailable: now

Exterior Features

Parking & Garage
Parking: Attached, On Site

Community

Other
Playground

Additional Information

Playground

Comparable Sales for 21000 Cornerstone Dr

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
923 Terrace Ln W #1, Diamond Bar, CA
1.83
Townhouse
$1,060,000
03/09/26
3
3
1,809 sqft
1253 Porto Grande #2, Diamond Bar, CA
1.99
Townhouse
$798,800
07/14/26
3
3
1,485 sqft
1217 Porto Grande #1, Diamond Bar, CA
2.07
Townhouse
$770,000
01/23/26
3
3
1,642 sqft
22966 Estoril Dr #1, Diamond Bar, CA
2.03
Townhouse
$828,800
06/12/26
3
3
1,570 sqft
1221 Porto Grande #4, Diamond Bar, CA
2.07
Townhouse
$792,000
12/15/25
3
3
1,642 sqft
817 Terrace Ln E #7, Diamond Bar, CA
1.88
Townhouse
$1,390,000
07/28/26
4
5
2,430 sqft
3613 Redwood Ln, West Covina, CA
2.10
Townhouse
$639,000
07/09/26
3
2.5
1,682 sqft
22810 Chardonnay Dr #2, Diamond Bar, CA
2.06
Townhouse
$808,000
09/17/26
3
2.5
1,485 sqft
3865 Sycamore St, West Covina, CA
2.11
Townhouse
$580,000
03/09/26
3
3
1,269 sqft
22905 Colombard Ln #5, Diamond Bar, CA
2.22
Townhouse
$849,000
02/27/26
3
2.5
1,685 sqft

Nearby homes

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Around this home

What Locals Say about Walnut

This October

Trick-or-Treat Score

Built from what locals say about this neighborhood.
  • 88% say there are sidewalks
  • 63% say there's holiday spirit
  • 47% say neighbors are friendly
Trulia Trick or TreatStart Ghost Hunt
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
Jul 4, 2026
Source: Zillow Rentals
ListingRemoved
$4,200
Jun 15, 2026
Source: Zillow Rentals
Listed For Rent
$4,200
Oct 19, 2020
Source: Agent Provided
ListingRemoved
$3,500
Oct 5, 2020
Source: Agent Provided
Listed For Rent
$3,500
Sep 12, 2019
Source: Agent Provided
ListingRemoved
$3,000

Frequently asked questions about 21000 Cornerstone Dr

  • What is 21000 Cornerstone Dr estimated to be worth?
    Trulia's estimated value for 21000 Cornerstone Dr in Walnut, CA is $922,500.
  • What is the price history for 21000 Cornerstone Dr?
    21000 Cornerstone Dr in Walnut, CA last sold for $720,000 in August 2019.
  • 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 21000 Cornerstone Dr have air conditioning?
    Yes, 21000 Cornerstone Dr in Walnut, CA has air conditioning.
  • Does 21000 Cornerstone Dr have parking?
    Yes, 21000 Cornerstone Dr in Walnut, CA has on-site parking.

Homes for rent near 21000 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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