21487 Cold Spring Ln, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21487 Cold Spring Ln, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	3 bd · 4 ba · 3,888 sqft · built 1977
Lot Size	0.353 acres (15,370 sqft)
Owner	2 Company Names on Record
Last Sale	$950,000 (Sep 2014)
Tax Bill	$14,527 (2025)
Deeds & Mortgages	Feb 2026 Transfer Mar 2020 Line of Credit
Flood Zone	Zone X (minimal risk)
APN	`8714-004-010`

Property Details

APN / Parcel Number

Primary APN	`8714-004-010`

Interior

Bedrooms	3 Beds
Full Baths	4 Baths
Building Area	3,888 sqft Living Area

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1977
Construction Type	Wood
Lot Area	15,370 sqft (0.353 acres)

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	21487 COLD SPRING LN
City	DIAMOND BAR
State	CA
Zip	91765-3814
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR19000*
Legal Description	*TR=32974 LOT 42
Legal Subdivision	32974
Legal Tract	32974
Legal Block	2
Legal Lot Number	42
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	2
Census Block	2019
Census Tract	403325

Owner

Source: Los Angeles County records, as of May 21, 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 Record
Mailing Address	21487 COLD SPRING LN, DIAMOND BAR, CA 91765-3814
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Revocable Trust

Deeds, Mortgages & Sale History

Date	Document
Feb 12, 2026	Intrafamily Transfer, Transfer
Mar 19, 2020	Deed of Trust, Mortgage · Line of Credit CATHAY BANK

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 12, 2014 · Amount on Record
Deed Sale	Sep 12, 2014 · Amount on Record
Prior Sale	Oct 28, 2008 · Amount on Record
Deed Document Number	2014966326
Last Transfer Date	Nov 14, 2025
Transfer Doc	0000105539
Record Updated	Sep 20, 2026

February 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Feb 12, 2026
Property Address	21487 COLD SPRING LN, DIAMOND BAR, CA 91765-3814
Document Number	0000105539
Map Reference	MB 873 PG 50-56
Instrument Date	Nov 14, 2025
Instrument	26-0105539
Transaction Type	Transfer
Record Updated	Mar 3, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	21487 COLD SPRING LN, DIAMOND BAR, CA 91765-3814

March 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21487 COLD SPRING LN, DIAMOND BAR, CA 91765-3814
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	CHICAGO TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000327058
Date	Mar 19, 2020
Instrument	20-0327058

Lender

Name	CATHAY BANK
Type	Bank
Address	DIAMOND BAR, CA 91765

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Mar 9, 2050

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of May 21, 2026

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2025	$14,527.00 (+8.03%) Homeowner's exemption	$1,141,749 (+4.04%) Land $561,140 Building $580,609
2023	$13,447.00 (+2.1%) Homeowner's exemption	$1,097,415 Land $539,351 Building $558,064
2022	$13,170.00

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

Flood

Source: FEMA National Flood Hazard Layer, effective September 30, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Moderate above 44% of the US · lower than 74% of California
Wildfire Likelihood	0.06% annual chance
Exposure	Indirect within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	WALNUT VALLEY WATER DISTRICT serves 100,941 people · EPA ID CA1910234
Water Source	Purchased surface water from several systems
Last State Inspection	Jun 2023
Lead	Under 1 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 565 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
T-Mobile Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Frontier, Verizon.

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