21040 Cornerstone Dr, Walnut, CA 91789 Property Records

Los Angeles County property record for 21040 Cornerstone Dr, Walnut, CA 91789 · Last verified August 2026

Property Highlights

Property Type	Residential > Condominium / Townhouse > Condominium
Bedrooms	4 Beds
Bathrooms	3 Baths
Year Built	Built 2018
Square Footage	1,830 sqft Living Area
Lot Size	19,947 sqft (0.458 acres)
Occupancy	Owner Occupied
Last Sale	$721,000 (2018)
Tax Bill	$10,030.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`8720-047-135`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	1,830 sqft Living Area

Exterior

Year Built	Built 2018
Effective Year Built	Effective 2018
Architectural Style	Condo/Apartment Style
Construction Type	Wood Construction
Lot Area	19,947 sqft (0.458 acres)

Utilities and HVAC

Cooling System	HVAC Cooling
Heating System	Central Heating

Location & Zoning

Street Address	21040 CORNERSTONE DR
City	WALNUT
State	CA
Zip	91789-2571
Property Usage	Residential Property Usage
Type	Residential > Condominium / Townhouse > Condominium
Legal Description	TR=73294 LOT 44 PH 11 CONDO UNIT 56 (AIRSPACE AND 1/9 INT IN COMMON AREA)
Legal Tract	73294
Legal Block	2
Legal Lot Number	44
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 8720-047-135

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

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

Owner of Record	2 Individual Names on File
Mailing Address	21040 CORNERSTONE DR, WALNUT, CA 91789-2571
Occupancy	Owner Occupied
Owner Type	Owner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Dec 14, 2018 · Amount on Record
Deed Sale	Dec 14, 2018 · Amount on Record
Deed Doc Number	20181270748
Record Refreshed	Sep 20, 2026

December 2018: Grant Deed, Subdivision Related Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Dec 14, 2018
Property Address	21040 CORNERSTONE DR, WALNUT, CA 91789-2571
Document Number	0001270748
Map Reference	MB 1390 PG 37-44
Instrument Date	Nov 29, 2018
Instrument	18-1270748
Transaction Type	Subdivision Related Transfer
Record Updated	Sep 22, 2021
Title Company	FIDELITY NATIONAL TITLE BUIL

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
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	Community Property (Marital Community) with Rights of Survivorship
Address	21040 CORNERSTONE DR, WALNUT, CA 91789-2571

Mortgage

Document Number	0001270749
Date	Dec 14, 2018
Instrument	18-1270749

Lender

Name	HSBC BANK USA
Type	Bank

Agreement

Type	Adjustable Rate Mortgage (ARM)
Amount	Amount Recorded
Term	361 Months
Due	Jan 01, 2049

Interest

Rate Type	Adjustable Rate
Rate	4.43%
Type Change Date	Jan 01, 2026
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	9.43%
Index	1-Year LIBOR
Max Rate	9.43%

Tax Assessment & Valuation

Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified August 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	$10,030.00 (+5.13%)	$804,285 (+4.04%) Land $480,563 Building $323,722
2024	$9,541.00 (+2.54%)
2023	$9,305.00 (+2.13%)	$773,055 Land $461,903 Building $311,152
2022	$9,111.00