21454 Cold Spring Ln, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21454 Cold Spring Ln, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	3 bd · 3 ba · 2,712 sqft · built 1977
Lot Size	0.555 acres (24,184 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,135,000 (May 2021)
Tax Bill	$15,486 (2025)
Deeds & Mortgages	May 2021 Sale & Mortgage May 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8714-001-013`

Property Details

APN / Parcel Number

Primary APN	`8714-001-013`

Interior

Bedrooms	3 Beds
Full Baths	3 Baths
Building Area	2,712 sqft Living Area

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1977
Construction Type	Wood
Lot Area	24,184 sqft (0.555 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	21454 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 20
Legal Subdivision	32974
Legal Tract	32974
Legal Block	2
Legal Lot Number	20
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, as of August 25, 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 Record
Mailing Address	21454 COLD SPRING LN, DIAMOND BAR, CA 91765-3813
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
May 20, 2021	Grant Deed, Transfer · Conventional Mortgage NMSI INC
May 20, 2021	Intrafamily Transfer, Transfer WFG NATIONAL TITLE COMPANY/CA, WFG NATIONAL TITLE CO OF CA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 20, 2021 · Amount on Record
Deed Sale	May 20, 2021 · Amount on Record
Prior Sale	Jul 2, 2015 · Amount on Record
Deed Document Number	2021813784
Prior Transfer Date	May 10, 2021
Prior Transfer Doc	0000813783
Record Updated	Oct 29, 2026

May 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	May 20, 2021
Property Address	21454 COLD SPRING LN, DIAMOND BAR, CA 91765-3813
Document Number	0000813784
Map Reference	MB 873 PG 50-56
Instrument Date	May 17, 2021
Instrument	21-0813784
Transaction Type	Transfer
Record Updated	May 31, 2021
Title Company	WFG NATIONAL TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Common
Address	21454 COLD SPRING LN, DIAMOND BAR, CA 91765-3813

Mortgage

Document Number	0000813785
Date	May 20, 2021
Instrument	21-0813785

Lender

Name	NMSI INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jun 1, 2051

May 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	May 20, 2021
Property Address	21454 COLD SPRING LN, DIAMOND BAR, CA 91765-3813
Document Number	0000813783
Map Reference	MB 873 PG 50-56
Instrument Date	May 10, 2021
Instrument	21-0813783
Transaction Type	Transfer
Record Updated	May 31, 2021
Title Company	WFG NATIONAL TITLE COMPANY/CA, WFG NATIONAL TITLE CO OF CA

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
Address	21454 COLD SPRING LN, DIAMOND BAR, CA 91765-3813
Investor	Possibly a Property Investor

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of August 25, 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
2026		$1,253,127 (+2%) Land $761,703 Building $491,424
2025	$15,486.00 (+7.55%) Homeowner's exemption	$1,228,557 (+4.04%) Land $746,768 Building $481,789
2023	$14,399.00 (+2.46%) Homeowner's exemption	$1,180,853 Land $717,771 Building $463,082
2022	$14,053.00

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	Low lower than 66% of the US · lower than 80% of California
Wildfire Likelihood	0.03% annual chance
Exposure	None beyond 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 425 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Frontier Fiber	7,000 / 7,000
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: Verizon.

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