21018 Cornerstone Dr, Walnut, CA 91789 Property Records

Los Angeles County property record for 21018 Cornerstone Dr, Walnut, CA 91789 · Last verified June 2026

Property Highlights

Property Type	Residential > Condominium / Townhouse > Condominium
Bedrooms	4 Beds
Bathrooms	3 Baths
Architecture Style	Condo/Apartment
Year Built	Built 2018
Square Footage	1,760 sqft Living Area
Last Sale	$765,000 (2021)
Tax Bill	$10,097.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`8720-047-087`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	1,760 sqft Living Area

Exterior

Year Built	Built 2018
Effective Year Built	Effective 2018
Architectural Style	Condo/Apartment Style
Construction Type	Wood Construction

Utilities and HVAC

Cooling System	HVAC Cooling
Heating System	Central Heating

Location & Zoning

Street Address	21018 CORNERSTONE DR
City	WALNUT
State	CA
Zip	91789-2571
Property Usage	Residential Property Usage
Type	Residential > Condominium / Townhouse > Condominium
Legal Description	TR=73294 LOT 43 PH 2 CONDO UNIT 46 (AIRSPACE AND 1/9 INT IN COMMON AREA)
Legal Subdivision	GALLERY AT CORNERSTONE
Legal Tract	73294
Legal Block	2
Legal Lot Number	43
Jurisdiction	LOS ANGELES CA
Minor Civil Division	EAST SAN GABRIEL VALLEY
Census Blockgroup	2
Census Block	2011
Census Tract	403402

Owner

Source: Los Angeles County records · APN 8720-047-087

Assessment roll updated May 21, 2026 · Last verified June 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Company Names on File
Mailing Address	16728 SAGE CIR, CHINO HILLS, CA 91709-7433
Owner Type	Owner is a Company
Vesting	Owner is a Trust, Family Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jul 12, 2021 · Amount on Record
Deed Sale	Jul 12, 2021 · Amount on Record
Prior Sale	Aug 31, 2017 · Amount on Record
Deed Doc Number	20211072303
Record Refreshed	Sep 20, 2026

July 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Jul 12, 2021
Property Address	21018 CORNERSTONE DR, WALNUT, CA 91789-2571
Document Number	0001072303
Map Reference	MB 1390 PG 37-44
Instrument Date	Jul 06, 2021
Instrument	21-1072303
Transaction Type	Transfer
Record Updated	Jun 07, 2023
Title Company	CALIFORNIA BEST TITLE

Transaction

Amount	Amount Recorded
Tax	$0.00
Amount Accuracy	Rounded Values by County
Additional	Arms Length Transaction

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	16728 SAGE CIR, CHINO HILLS, CA 91709-7433
Investor	Possibly a Property Investor

Tax Assessment & Valuation

Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 2026

Property Jurisdictions

Type	Name
State	California
County	Los Angeles County
Municipality	Walnut City
Unified School District	Walnut Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Assessed value is set for property tax purposes and is not a market price estimate.

Year	Tax Bill	Assessed Value
2025	$10,097.00 (+7.72%)	$811,822 (+4.04%) Land $494,416 Building $317,406
2023	$9,373.00 (+2.12%)	$780,300 Land $475,218 Building $305,082
2022	$9,178.00