20988 Cornerstone Dr, Walnut, CA 91789
OFF MARKET

20988 Cornerstone Dr
Walnut, CA 91789

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

$868,100

Trulia Estimate
as of Aug 11, 2026
Est. Refi. Payment $5,332/mo*
Refinance Your Home

$868,100

Trulia Estimate
as of Aug 11, 2026
Est. Refi. Payment $5,332/mo*
Refinance Your Home
3 Beds
4 Baths
1,760 sqft
(on 0.40 acres)

Home Value

Trulia Estimate
$868K
Since last month
Decreased$19K (-2.1%)
Since last year
Decreased$61K (-6.6%)
Since last sale
Increased$212K (+32.2%)
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 +44% in the last 10 years
MonthEstimated value
2026
August 2026$868K
July 2026$874K
June 2026$887K
May 2026$890K
April 2026$901K
March 2026$922K
February 2026$896K
January 2026$884K
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
20122 Candleflame Ct, Walnut, CA
2.21
Multi-Family Home
$1,588,168
01/09/26
1
1
300
23617 Golden Springs Dr #K-1, Diamond Bar, CA
2.38
Apartment
$310,000
10/22/25
1
1
768
1104 Cleghorn Dr #F, Diamond Bar, CA
2.61
Apartment
$638,500
06/17/26
2
1.5
1,048
23601 Golden Springs Dr #A-10, Diamond Bar, CA
2.38
Apartment
$331,000
07/07/26
2
2
949
23665 Golden Springs Dr #E-2, Diamond Bar, CA
2.38
Apartment
$320,000
08/29/25
2
2
949
2350 S Diamond Bar Blvd #L, Diamond Bar, CA
2.72
Apartment
$520,000
07/22/26
2
2
916
1521 Rose Ct, West Covina, CA
3.90
Apartment
$679,000
05/27/26
3
3
1,442
2145 E Aroma Dr #88, West Covina, CA
3.76
Apartment
$400,000
02/05/26
2
1
968
524 S Astell Ave, West Covina, CA
5.22
Apartment
$1,260,000
12/05/25
3
2
1,202
1431 Eagle Park Rd #133, Hacienda Heights, CA
5.46
Apartment
$560,000
06/16/26
3
2
1,098
Home facts updated by county records

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
20980 Cornerstone Dr, Walnut, CA 91789
0.03
$940,000
3
3.5
1,760
Off Market
20968 Cornerstone Dr, Walnut, CA 91789
0.03
$939,500
3
3.5
1,880
Off Market
21002 Cornerstone Dr, Walnut, CA 91789
0.00
$971,000
4
3
1,800
Recently Sold
20956 Cornerstone Dr, Walnut, CA 91789
0.05
$888,000
3
3.5
1,760
Recently Sold
151 Redstone Dr, Walnut, CA 91789
0.05
$1,425,300
4
3
2,364
Off Market
155 Blue Crystal Dr, Walnut, CA 91789
0.04
$1,312,800
4
3
2,072
Off Market
130 Greenleaf Dr, Walnut, CA 91789
0.08
$1,063,100
4
3.5
1,931
Off Market
150 Greenleaf Dr, Walnut, CA 91789
0.07
$1,295,600
5
4
2,364
Off Market
159 Redstone Dr, Walnut, CA 91789
0.07
$1,379,500
4
3
2,316
Off Market
159 Sterling Dr, Walnut, CA 91789
0.06
$1,396,500
4
3
2,183
Off Market
20916 Jade Dr, Walnut, CA 91789
0.11
$912,700
4
3.5
1,760
Off Market
20936 Delphine Dr, Walnut, CA 91789
0.13
$1,138,400
3
2
1,714
Off Market

Local Information

  • Map ViewExplore the area around 20988 Cornerstone Dr.
-- mins to
Commute Destination

Home Highlights

Property Type
Apartment
Year Built
2017
Lot Size
0.4 acres
Living Area
1,760 sqft
Price/Sqft
$493
Parking
Garage

About this House

This apartment is located at 20988 Cornerstone Dr, Walnut, CA. 20988 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 2017.
20988 Cornerstone Dr, Walnut, CA 91789 is a 3 bedroom, 4 bathroom, 1,760 sqft apartment built in 2017. It last sold for $656,454 on Mar 21, 2018. More recently, it was listed as a rental in November 2025 with an asking price of $3,700 per month. That rental listing was removed on December 28, 2025. It is currently off market. The Trulia Estimate is $868,100, with a rent estimate of $3,944/month.

Home Details for 20988 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
DryerWasher
Levels, Entrance, & Accessibility
Floors: Hardwood

Property Information

Year Built
Year Built: 2017
Property Type / Style
Property Type: Apartment

Rental Terms, Policies & Fees

Furnished

Exterior Features

Parking & Garage
GarageParking Spaces: 2Parking: Garage Attached, Off Street

Community

Units in Building: 1

Lot Information

Lot Area: 0.40 acres

Price and Tax history

DateEventPrice
Dec 28, 2025
Source: CRMLS #WS25260520
ListingRemoved
$3,700
Nov 15, 2025
Source: CRMLS #WS25260520
Listed For Rent
$3,700
Oct 23, 2023
Source: Zillow Rentals
ListingRemoved
Aug 23, 2023
Source: Zillow Rentals
Listed For Rent
$3,800
Mar 21, 2018
Source: N/A
Sold
$656,454

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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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

  • 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

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Homes for sale near 20988 Cornerstone Dr

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Off Market Homes Near 20988 Cornerstone Dr

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Frequently asked questions about 20988 Cornerstone Dr

  • What is 20988 Cornerstone Dr estimated to be worth?
    Trulia's estimated value for 20988 Cornerstone Dr in Walnut, CA is $868,100.
  • What is the price history for 20988 Cornerstone Dr?
    20988 Cornerstone Dr in Walnut, CA last sold for $656,454 in March 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 20988 Cornerstone Dr have air conditioning?
    Yes, 20988 Cornerstone Dr in Walnut, CA has air conditioning.
  • Does 20988 Cornerstone Dr have laundry facilities?
    Yes, 20988 Cornerstone Dr in Walnut, CA has in-unit laundry.