21483 Cold Spring Ln, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21483 Cold Spring Ln, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	3 bd · 3 ba · 2,378 sqft · built 1977
Lot Size	0.339 acres (14,779 sqft)
Owner	2 Company Names on File
Last Sale	$247,000 (Dec 1997)
Tax Bill	$5,540 (2025)
Deeds & Mortgages	Apr 2018 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8714-004-008`

Property Details

APN / Parcel Number

Primary APN	`8714-004-008`

Interior

Bedrooms	3 Beds
Full Baths	3 Baths
Building Area	2,378 sqft Living Area

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1977
Construction Type	Wood
Lot Area	14,779 sqft (0.339 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	21483 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 40
Legal Subdivision	32974
Legal Tract	32974
Legal Block	2
Legal Lot Number	40
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 · APN 8714-004-008

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	21483 COLD SPRING LN, DIAMOND BAR, CA 91765-3814
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Dec 31, 1997 · Amount on Record
Deed Sale	Dec 31, 1997 · Amount on Record
Deed Document Number	19972041822
Last Transfer Date	Feb 26, 2018
Transfer Doc	0000370882
Record Updated	Sep 20, 2026

April 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Apr 17, 2018
Property Address	21483 COLD SPRING LN, DIAMOND BAR, CA 91765-3814
Document Number	0000370882
Instrument Date	Feb 26, 2018
Instrument	370882
Transaction Type	Transfer
Record Updated	May 01, 2018

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	21483 COLD SPRING LN DIAMOND BAR CA 917653814, DIAMOND BAR, CA 91765-3814
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	$5,540.00 (+9.1%) Homeowner's exemption	$400,413 (+4.04%) Land $147,045 Building $253,368
2023	$5,078.00 (+2.15%) Homeowner's exemption	$384,866 Land $141,336 Building $243,530
2022	$4,971.00

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.