21498 Cold Spring Ln, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21498 Cold Spring Ln, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	3 bd · 3 ba · 2,796 sqft · built 1977
Lot Size	0.524 acres (22,803 sqft)
Owner	2 Company Names on File
Last Sale	$675,000 (Nov 2009)
Tax Bill	$11,370 (2025)
Deeds & Mortgages	Jan 2026 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8714-002-005`

Property Details

APN / Parcel Number

Primary APN	`8714-002-005`

Interior

Bedrooms	3 Beds
Full Baths	3 Baths
Building Area	2,796 sqft Living Area

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1977
Construction Type	Wood
Lot Area	22,803 sqft (0.524 acres)
Pool Type	Spa / Hot Tub (No Pool)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	21498 COLD SPRING LN
City	DIAMOND BAR
State	CA
Zip	91765-3813
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR19000*
Legal Description	*TR=32974 LOT 3
Legal Subdivision	32974
Legal Tract	32974
Legal Block	2
Legal Lot Number	3
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	2
Census Block	2017
Census Tract	403325

Owner

Source: Los Angeles County records · APN 8714-002-005

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	23738 GOLD RUSH DR, DIAMOND BAR, CA 91765-2156
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Nov 24, 2009 · Amount on Record
Deed Sale	Nov 24, 2009 · Amount on Record
Prior Sale	May 20, 2004 · Amount on Record
Deed Document Number	20091782752
Prior Transfer Date	May 11, 2004
Prior Transfer Doc	0001283654
Record Updated	Sep 20, 2026

January 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Jan 05, 2026
Property Address	21498 COLD SPRING LN, DIAMOND BAR, CA 91765-3813
Document Number	0000005997
Map Reference	MB 873 PG 50-56
Instrument Date	Nov 14, 2025
Instrument	26-0005997
Transaction Type	Transfer
Record Updated	Jan 23, 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	Family Trust
Address	23738 GOLD RUSH DR, DIAMOND BAR, CA 91765-2156
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	Diamond Bar 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	$11,370.00 (+5.74%)	$871,289 (+4.04%) Land $444,808 Building $426,481
2024	$10,753.00 (+2.9%)
2023	$10,450.00 (+2.59%)	$837,458 Land $427,537 Building $409,921
2022	$10,186.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of September 30, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

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

Wildfire

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

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

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

May also be available: Frontier, Verizon.

Based on FCC filings for 565 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	WALNUT VALLEY WATER DISTRICT serves 100,941 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.