21018 Cornerstone Dr, Walnut, CA 91789
Property image
Property image
OFF MARKET

$873,000

Trulia Estimate
  • 3 Beds
  • 4 Baths
  • 1,760 sqft (on 0.40 acres)

21018 Cornerstone Dr, Walnut, CA 91789

Est. Refi. Payment $5,797/mo*
Refinance Your Home
Currently Off Market - Sold Jul 12, 2021 for $765,000

Home Value

Trulia Estimate
$873K
Since last month
Increased$8K (+0.9%)
Since last year
Decreased$39K (-4.3%)
Since last sale
Increased$108K (+14.1%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +39% in the last 10 years
MonthEstimated value
2026
October 2026$873K
September 2026$870K
August 2026$865K
July 2026$892K
June 2026$904K
May 2026$914K
April 2026$924K
March 2026$925K
February 2026$927K
January 2026$899K
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
20956 Cornerstone Dr, Walnut, CA
0.08
Townhouse
$888,000
10/16/25
3
3.5
1,760
923 Terrace Ln W #1, Diamond Bar, CA
1.82
Townhouse
$1,060,000
03/09/26
3
3
1,809
1253 Porto Grande #2, Diamond Bar, CA
1.98
Townhouse
$798,800
07/14/26
3
3
1,485
1217 Porto Grande #1, Diamond Bar, CA
2.05
Townhouse
$770,000
01/23/26
3
3
1,642
1221 Porto Grande #4, Diamond Bar, CA
2.05
Townhouse
$792,000
12/15/25
3
3
1,642
22966 Estoril Dr #1, Diamond Bar, CA
2.02
Townhouse
$828,800
06/12/26
3
3
1,570
817 Terrace Ln E #7, Diamond Bar, CA
1.87
Townhouse
$1,390,000
07/28/26
4
5
2,430
22905 Colombard Ln #5, Diamond Bar, CA
2.21
Townhouse
$849,000
02/27/26
3
2.5
1,685
22810 Chardonnay Dr #2, Diamond Bar, CA
2.05
Townhouse
$808,000
09/17/26
3
3
1,485
3865 Sycamore St, West Covina, CA
2.13
Townhouse
$580,000
03/09/26
3
3
1,269

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
21030 Cornerstone Dr, Walnut, CA 91789
0.00
$912,900
4
3
1,830
Off Market
21038 Cornerstone Dr, Walnut, CA 91789
0.00
$971,100
4
4
1,830
Off Market
21032 Cornerstone Dr, Walnut, CA 91789
0.00
$948,800
4
3
1,750
Off Market
21036 Cornerstone Dr, Walnut, CA 91789
0.00
$949,600
4
3
1,760
Off Market
21022 Cornerstone Dr, Walnut, CA 91789
0.00
$949,200
4
4
1,983
Off Market
21012 Cornerstone Dr, Walnut, CA 91789
0.00
$899,000
4
3
1,820
Off Market
21020 Cornerstone Dr, Walnut, CA 91789
0.00
$988,100
4
3.5
1,873
Off Market
21016 Cornerstone Dr, Walnut, CA 91789
0.00
$947,600
4
3
1,873
Off Market
21038 Cornerstone Dr #21038, Walnut, CA 91789
0.00
-
4
4
1,830
Off Market
21002 Cornerstone Dr, Walnut, CA 91789
0.03
$971,000
4
3
1,800
Recently Sold
20986 Cornerstone Dr, Walnut, CA 91789
0.03
$962,500
4
3
1,780
Off Market
21000 Cornerstone Dr, Walnut, CA 91789
0.03
$919,800
4
3.5
1,830
Off Market
21008 Cornerstone Dr, Walnut, CA 91789
0.03
$917,000
4
4
1,750
Off Market
20990 Cornerstone Dr, Walnut, CA 91789
0.03
$927,800
4
3
1,750
Off Market
21010 Cornerstone Dr, Walnut, CA 91789
0.03
$677,000
4
3
1,830
Recently Sold
21006 Cornerstone Dr, Walnut, CA 91789
0.03
$1,038,300
3
4
1,760
Off Market
20988 Cornerstone Dr, Walnut, CA 91789
0.03
$858,400
3
4
1,760
Off Market
20992 Cornerstone Dr, Walnut, CA 91789
0.03
$950,400
4
3
1,830
Off Market
21008 Cornerstone Dr, Walnut, CA 91789
0.03
-
Studio
-
-
Off Market
21048 Cornerstone Dr, Walnut, CA 91789
0.03
$1,104,000
4
4
1,983
Off Market

Local Information

  • Map ViewExplore the area around 21018 Cornerstone Dr.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Townhouse
Built in 2018
0.4 acre lot
1,760 sqft
$496/sqft
Garage

About this House

What's unique:Newer built condoClose to shopping centers
This townhouse is located at 21018 Cornerstone Dr, Walnut, CA. 21018 Cornerstone Dr is in Walnut, CA and in ZIP code 91789. This property has 3 bedrooms, 4 bathrooms and approximately 1,760 sqft of floor space. This property has a lot size of 0.40 acres and was built in 2018.
21018 Cornerstone Dr, Walnut, CA 91789 is a 3 bedroom, 4 bathroom, 1,760 sqft townhouse built in 2018. It last sold for $765,000 on Jul 12, 2021. More recently, it was listed as a rental in August 2023 with an asking price of $3,850 per month. That rental listing was removed on September 11, 2023. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $873,000, with a rent estimate of $3,909/month.

Home Details for 21018 Cornerstone Dr

Interior Features

Heating & Cooling
Heating: Forced Air, ElectricAir ConditioningHeating Fuel: Forced Air
Interior Details
Types of Rooms: Walk In Closet, Dining Room, Family Room
Appliances & Utilities
Dishwasher
Levels, Entrance, & Accessibility
Floors: Tile, Carpet, Laminate

Exterior Features

Exterior Home Features
Roof: Tile
Parking & Garage
GarageParking: Garage Detached

Property Information

Year Built
Year Built: 2018
Property Type / Style
Property Type: TownhouseArchitecture: Spanish

Community

Units in Building: 1

Lot Information

Lot Area: 0.40 acres

Price and Tax history

DateEventPrice
Sep 11, 2023
Source: Zillow Rentals
ListingRemoved
Sep 6, 2023
Source: Zillow Rentals
PriceChange
$3,600
Price decreased by 6%
Aug 31, 2023
Source: Zillow Rentals
Listed For Rent
$3,850
Aug 21, 2023
Source: Zillow Rentals
ListingRemoved
Jul 31, 2023
Source: Zillow Rentals
Listed For Rent
$3,950

Market trends in Walnut

Last updated August 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
84
5MoM

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

Frequently asked questions about 21018 Cornerstone Dr

  • What is 21018 Cornerstone Dr estimated to be worth?
    Trulia's estimated value for 21018 Cornerstone Dr in Walnut, CA is $873,000.
  • What is the price history for 21018 Cornerstone Dr?
    21018 Cornerstone Dr in Walnut, CA last sold for $765,000 in July 2021.
  • 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 21018 Cornerstone Dr have a garage?
    Yes, 21018 Cornerstone Dr in Walnut, CA has a garage.

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