2. 21002 Cornerstone Dr Walnut CA
21002 Cornerstone Dr Walnut CA

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21002 Cornerstone Dr Walnut, CA

21002 Cornerstone Dr Walnut, CA 91789 was built in 2018 and last sold for $971,000. The property has recorded lot details and is listed as a Condominium. The property is currently not for sale. Current estimates place the value near 961,000, reflecting a -3% change over the past year, with 4 beds, 3 baths, and approximately 1,800 sq ft of living space. If you are looking to buy or rent a property, use USPhoneBook's property database to avoid rental scams, understand tax liabilities, and get a sense of the property's value over time. You can also check out the neighborhood section and see nearby homes, last sold for prices, tax records and more.
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Public Facts

$971,000
Last sold Mar 24, 2026
4
Beds
3
Baths
1,800
Sqft
Off Market
$961,000 estimated value
Built in 2018
$534/sqft
$276 HOA fees

Property characteristics

Property type
Residential
Zoning type
Condominium
APN
8720-047-083
Subdivision
Gallery At Cornerstone
Heating
Central
Cooling
Yes

Property History

Over the last 12 months, the sales price of 21002 Cornerstone Dr Walnut, CA 91789 has decreased by -3%, and the tax increased by 4%.

Price History

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Year Price Price/Sq Ft
2026 $ 935,000 -3 % $ 519
2025 $ 964,000 0 % $ 536
2024 $ 963,000 0 % $ 535
2023 $ 960,000 3 % $ 533
2022 $ 926,000 14 % $ 514
2021 $ 806,000 ---- $ 448

Tax History

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Year Taxes Assesments
2025 $ 11,794 4 % $ 955,086
2024 $ 11,251 2 %
2023 $ 10,972 26 % $ 918,000
2022 $ 8,648 1 % $ 717,301
2021 $ 8,486 ---- $ 703,237
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Owner

Haesoon Shin Haesoon Shin , Age 61

Lives at 21002 Cornerstone Dr, Walnut, CA 91789-2571
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People Living at 21002 Cornerstone Dr Walnut, CA

Haesoon Shin Haesoon Shin , Age 61

Lives at 21002 Cornerstone Dr, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone Dr
Prior addresses: 1830 Camberley Ln, Apt 220, Hacienda Heights, CA 91745-5855 Hacienda Heights CA 91745 1830 Camberley Ln, Apt 220 17800 Colima Rd, Apt 536, Rowland Heights, CA 91748-1738 Rowland Heights CA 91748 17800 Colima Rd, Apt 536
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Dongfang Zou Dongfang Zou , Age 46

Lives at 21002 Cornerstone DR, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone DR
Prior addresses: 1216 Lodestone Dr, San Jose, CA 95132-2622 San Jose CA 95132 1216 Lodestone Dr 1362 Kingfisher Way, Apt 33, Sunnyvale, CA 94087-3555 Sunnyvale CA 94087 1362 Kingfisher Way, Apt 33 555 W Cesar E Chavez Ave, Apt 207, Los Angeles, CA 90012-2175 Los Angeles CA 90012 555 W Cesar E Chavez Ave, Apt 207
Relatives: Yanan Zou
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Lorena Dimain Lorena R Dimain , Age 53

Lives at 23644 Via Rancho Dr, Diamond Bar, CA 91765-2154 Diamond Bar CA 91765 23644 Via Rancho Dr
Prior addresses: 21002 Cornerstone Dr, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone Dr 1756 E Woodridge Cir, West Covina, CA 91792-1955 West Covina CA 91792 1756 E Woodridge Cir 4322 Maxson Rd, El Monte, CA 91732-2048 El Monte CA 91732 4322 Maxson Rd
Relatives: Alexander Dimain
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Alexander Dimain Alexander C Dimain , Age 56

Lives at 23644 Via Rancho Dr, Diamond Bar, CA 91765-2154 Diamond Bar CA 91765 23644 Via Rancho Dr
Prior addresses: 21002 Cornerstone Dr, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone Dr 1756 E Woodridge Cir, West Covina, CA 91792-1955 West Covina CA 91792 1756 E Woodridge Cir 4322 Maxson Rd, El Monte, CA 91732-2048 El Monte CA 91732 4322 Maxson Rd
Relatives: Lorena Dimain
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Hye Yoo Hye Lin Yoo , Age 37

Lives at 21002 Cornerstone DR, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone DR
Prior addresses: 1830 Camberley Ln, Hacienda Heights, CA 91745-5855 Hacienda Heights CA 91745 1830 Camberley Ln 1830 Camberley Ln, Apt 220, Hacienda Heights, CA 91745-5855 Hacienda Heights CA 91745 1830 Camberley Ln, Apt 220 17800 Colima Rd, Apt 536, Rowland Heights, CA 91748-1738 Rowland Heights CA 91748 17800 Colima Rd, Apt 536
Relatives: Ju Yoo, Sang Yoo
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Nicole Soriano Nicole Ruizol Soriano , Age 29

Lives at 21002 Cornerstone Dr, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone Dr
Prior addresses: 2358 Fulton St, San Francisco, CA 94118-4129 San Francisco CA 94118 2358 Fulton St 720 J St, Davis, CA 95616-2329 Davis CA 95616 720 J St
Relatives: Perliza Soriano, Phyke Soriano, Lotis Ruizol, Alexi Pascual, Ana Pascual, Aurora Pascual, Chi Pascual, Deborah Hohn, Edgardo Pascual
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Lotis Ruizol Lotis Ann Ruizol , Age 49

Lives at 23644 Via Rancho DR, Diamond Bar, CA 91765-2154 Diamond Bar CA 91765 23644 Via Rancho DR
Prior addresses: 21002 Cornerstone DR, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone DR 8111 Redbush Ln, Panorama City, CA 91402-5315 Panorama City CA 91402 8111 Redbush Ln 600 N Whitnall Hwy, Apt 203, Burbank, CA 91505-2968 Burbank CA 91505 600 N Whitnall Hwy, Apt 203
Relatives: Ana Pascual, Aurora Pascual, Edgardo Pascual, Elmer Pascual, Eriberto Pascual, Ernesto Pascual, Marc P, Perliza Soriano, Alexi Pascual
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Elmer Pascual Elmer L Pascual , Age 48

Lives at 23644 Via Rancho DR, Diamond Bar, CA 91765-2154 Diamond Bar CA 91765 23644 Via Rancho DR
Prior addresses: 21002 Cornerstone DR, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone DR 9500 Quakertown Ave, Chatsworth, CA 91311-5521 Chatsworth CA 91311 9500 Quakertown Ave 4321 W Kling St, Apt 22, Burbank, CA 91505-3738 Burbank CA 91505 4321 W Kling St, Apt 22
Relatives: Alexi Pascual, Ana Pascual, Aurora Pascual, Chi Pascual, Edgardo Pascual, Eriberto Pascual, Ernesto Pascual, Gerardine Pascual, Lotis Ruizol
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Hongbing Liu Hongbing Liu , Age 45

Lives at 138 Greenleaf Dr, Walnut, CA 91789-2573 Walnut CA 91789 138 Greenleaf Dr
Prior addresses: 21002 Cornerstone Dr, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone Dr
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Won Seo Won Jae Seo , Age 33

Lives at 14289 Ruby Glen CT, Chino Hills, CA 91709-5915 Chino Hills CA 91709 14289 Ruby Glen CT
Prior addresses: 21002 Cornerstone DR, Walnut, CA 91789-2571 Walnut CA 91789 21002 Cornerstone DR 19900 Wildcat Canyon Rd, Walnut, CA 91789-4457 Walnut CA 91789 19900 Wildcat Canyon Rd 21836 Stonepine Dr, Diamond Bar, CA 91765-2821 Diamond Bar CA 91765 21836 Stonepine Dr
Relatives: Adam Seo, Jeong Seo
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Neighbors

21006 Cornerstone Dr
Walnut, CA
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21000 Cornerstone Dr
Walnut, CA
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21010 Cornerstone Dr
Walnut, CA
View Property Report
21008 Cornerstone Dr
Walnut, CA
View Property Report

FAQs

Who lives at 21002 Cornerstone Dr, Walnut, CA 91789?
According to our records, the current person living in 21002 Cornerstone Dr is Haesoon Shin.
Is this property currently for sale?
The property is not for sale and last sold for $971,000 on Mar 24, 2026. Use USPhoneBook to review nearby listings or compare similar homes in the area.
What is the estimated value of this property?
The estimated value is $961,000, reflecting a -3% change over the past year. You can explore price history and tax records to see how the value has changed over time.
How big is this property?
Complete property size and structural details are currently unavailable.
What nearby properties can I compare this to?
Nearby homes include 21006 Cornerstone Dr, 21000 Cornerstone Dr, and 21010 Cornerstone Dr, each with its own property report to help compare size, value, and residents.