21385 Cold Spring Ln, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21385 Cold Spring Ln, Diamond Bar, CA 91765

Property Summary

Property Type	Regional Shopping Center, Mall
Details	7,365 sqft · built 1984
Lot Size	0.625 acres (27,224 sqft)
Owner	Company Name on File
Last Sale	$1,535,015 (Sep 2011)
Tax Bill	$23,233 (2025)
Flood Zone	Zone X (minimal risk)
APN	`8285-020-033`

Property Details

APN / Parcel Number

Primary APN	`8285-020-033`

Interior

Stories	1 Story
Building Area	7,365 sqft Total Area

Exterior

Year Built	Built 1984
Effective Year Built	Effective 1984
Construction Type	Wood
Fire Resistance	Wood or Wood & Steel Frame
Lot Area	27,224 sqft (0.625 acres)

Location & Zoning

Street Address	21385 COLD SPRING LN
City	DIAMOND BAR
State	CA
Zip	91765-3443
Property Category	Commercial
Property Type	Commercial > Retail > Regional Shopping Center, Mall
Local Zoning Code	LCC1*
Legal Description	P M 2347-28-31 THAT OR IN TRA 12108 OF LOT 2
Legal Subdivision	12108
Legal Tract	12108
Legal Block	1
Legal Lot Number	2
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1013
Census Tract	403325

Owner

Source: Los Angeles County records · APN 8285-020-033

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	Company Name on File
Mailing Address	23915 VENTURA BLVD, CALABASAS, CA 91302-1445
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Sep 28, 2011 · Amount on Record
Deed Sale	Sep 28, 2011 · Amount on Record
Prior Sale	May 06, 2008
Deed Document Number	20111312066
Prior Transfer Date	May 05, 2008
Prior Transfer Doc	0000793955
Record Updated	Sep 20, 2026

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	$23,233.00 (+6.28%)	$1,632,861 (+4.04%) Land $879,232 Building $753,629
2024	$21,861.00 (+2.31%)
2023	$21,368.00 (+2.04%)	$1,569,457 Land $845,092 Building $724,365
2022	$20,941.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Los Angeles County (06037C), as of September 30, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026

Flood

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

Wildfire

Wildfire Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond 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)
Frontier Fiber	7,000 / 7,000
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: Verizon.

Based on FCC filings for 425 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System, water system CA1910234, 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.