Shelby Wu
Coldwell Banker Realty
(858) 285-4406
45 Total Sales
1 in Walnut
$1,920,000 Price
Estimated Value: $972,494
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.
Last Agent to Rent the Property
Latitude 33 Real Estate License #02121350 Listed on: 06/14/2026
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
Shelby Wu
Coldwell Banker Realty
(858) 285-4406
45 Total Sales
1 in Walnut
$1,920,000 Price
Joe Wang
INNODUET PROPERTIES
(626) 436-3730
4 Total Sales
2 in Walnut
$1,580,000 Price Range
Scott McGookin
BHHS CA Properties
(909) 450-8407
7 Total Sales
2 in Walnut
$1,160,000 Price Range
Carole Sturim
Coldwell Banker Realty
(949) 518-0408
18 Total Sales
1 in Walnut
$1,100,000 Price
Patsy Chan
FAIRMATE INC.
(562) 600-9057
16 Total Sales
1 in Walnut
$940,000 Price
Ashley Kay
Re/Max Champions
(909) 490-3995
42 Total Sales
8 in Walnut
$1M - $1.6M Price Range
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Buyer | Sale Price | Title Company |
|---|---|---|---|
| $720,000 | Stewart Title | ||
| -- | None Available | ||
| -- | None Available | ||
| $700,000 | Fntg Builder Services |
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Status | Borrower | Loan Amount |
|---|---|---|---|
| Previous Owner | $384,900 |
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Event | Price | List to Sale | Price per Sq Ft | Prior Sale |
|---|---|---|---|---|---|
| 07/02/2026 07/02/26 | Rented | $4,200 | 0.0% | -- | |
| 06/14/2026 06/14/26 | For Rent | $4,200 | +16.7% | -- | |
| 07/29/2024 07/29/24 | Rented | $3,600 | 0.0% | -- | |
| 07/29/2024 07/29/24 | Under Contract | -- | -- | -- | |
| 07/29/2024 07/29/24 | For Rent | $3,600 | +20.0% | -- | |
| 10/18/2020 10/18/20 | Rented | $3,000 | -14.3% | -- | |
| 10/05/2020 10/05/20 | For Rent | $3,500 | +16.7% | -- | |
| 09/09/2019 09/09/19 | Rented | $3,000 | -99.6% | -- | |
| 09/09/2019 09/09/19 | Under Contract | -- | -- | -- | |
| 08/27/2019 08/27/19 | Sold | $720,000 | 0.0% | $393 / Sq Ft | View Prior Sale |
| 08/27/2019 08/27/19 | For Rent | $3,000 | 0.0% | -- | |
| 06/12/2019 06/12/19 | For Sale | $735,000 | -- | $402 / Sq Ft |
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2025 | $9,836 | $787,420 | $458,454 | $328,966 |
| 2024 | $9,355 | $771,981 | $449,465 | $322,516 |
| 2023 | $9,124 | $756,845 | $440,652 | $316,193 |
| 2022 | $8,934 | $742,006 | $432,012 | $309,994 |
| 2021 | $8,767 | $727,458 | $423,542 | $303,916 |
| 2019 | $8,483 | $713,898 | $435,642 | $278,256 |
| 2018 | $8,283 | $699,900 | $427,100 | $272,800 |
Landlord's Agent in 2026
Betty Huang
Latitude 33 Real Estate
(213) 514-4188
20 Total Sales
Tenant's Agent in 2026
Joshua Ramirez
Keller Williams World Media Center
(818) 692-9785
17 Total Sales
Seller's Agent in 2020
Jordan Wang
Keller Williams Realty Irvine
(949) 550-8885
145 Total Sales
Seller's Agent in 2019
Johnny Yu
Grand Lux Realty & Financial
(310) 879-9790
61 Total Sales
Source: California Regional Multiple Listing Service (CRMLS)
MLS Number: TR26129798
APN: 8720-047-084
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