21504 Cold Spring Ln, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21504 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	0.328 acres (14,274 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,380,000 (Sep 2026)
Tax Bill	$11,511 (2025)
Deeds & Mortgages	Sep 2026 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8714-002-003`

Property Details

APN / Parcel Number

Primary APN	`8714-002-003`

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	14,274 sqft (0.328 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	21504 COLD SPRING LN
City	DIAMOND BAR
State	CA
Zip	91765-3815
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR19000*
Legal Description	*TR=32974 LOT 1
Legal Subdivision	32974
Legal Tract	32974
Legal Block	2
Legal Lot Number	1
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 October 13, 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	20581 CALPET DR, WALNUT, CA 91789-3714
Owner Type	Individual
Vesting	Husband and Wife

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 28, 2026 · Amount on Record
Deed Sale	Sep 28, 2026 · Amount on Record
Prior Sale	Jan 20, 2012 · Amount on Record
Deed Document Number	2026722464
Prior Transfer Date	Mar 27, 1995
Prior Transfer Doc	0000442348
Record Updated	Oct 29, 2026

September 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Sep 28, 2026
Property Address	21504 COLD SPRING LN, DIAMOND BAR, CA 91765-3815
Document Number	0000722464
Instrument Date	Sep 10, 2026
Instrument	2026722464
Transaction Type	Transfer
Record Updated	Oct 5, 2026
Title Company	ORANGE COAST TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$153,318.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	20581 CALPET DR, WALNUT, CA 91789-3714

Mortgage

Document Number	0000722465,
Date	Sep 28, 2026
Instrument	2026722465

Lender

Name	BANK

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Oct 1, 2056

Interest

Rate Type	Adjustable Rate
Rate	5.75%
Initial Type	Adjustable Rate
Adjustable	Adjustable Rate Rider
Max Rate	-1%

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		$901,378 (+2%) Land $439,950 Building $461,428
2025	$11,511.00 (+8.6%)	$883,710 (+4.04%) Land $431,324 Building $452,386
2023	$10,599.00 (+2.58%)	$849,396 Land $414,576 Building $434,820
2022	$10,332.00

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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