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21231 Cold Spring Ln, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 21231 Cold Spring Ln, Diamond Bar, CA 91765 · Last verified June 2026

Property Summary

Property TypeSingle Family Home
Details3 bd · 2 ba · 1,280 sqft · built 1962
Lot Size0.181 acres (7,888 sqft)
Owner2 Individual Names on File
Last Sale$202,000 (Jan 2001)
Tax Bill$4,230 (2025)
Flood ZoneZone X (minimal risk)
APN8285-018-020

Property Details

APN / Parcel Number

Primary APN8285-018-020

Interior

Bedrooms3 Beds
Full Baths2 Baths
Total Rooms8 Rooms
Stories1 Story
Building Area1,280 sqft Living Area
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1962
Effective Year BuiltEffective 1963
Architectural StyleConventional
Exterior MaterialStucco
Construction TypeWood
Roof TypeGable
Roof MaterialWood Shingle
Lot Area7,888 sqft (0.181 acres)
Lot Dimensions110 ft deep x 69 ft wide

Utilities, Heating & Cooling

Heating SystemCentral

Location & Zoning

Street Address21231 COLD SPRING LN
CityDIAMOND BAR
StateCA
Zip91765-3441
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionTRACT # 25985 LOT 102
Legal Subdivision25985
Legal Tract25985
Legal Block1
Legal Lot Number102
JurisdictionLOS ANGELES CA
Township / Civil DivisionEAST SAN GABRIEL VALLEY
Census Block Group1
Census Block1006
Census Tract403325

Owner

Source: Los Angeles County records · APN 8285-018-020

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 Record2 Individual Names on File
Mailing Address21231 COLD SPRING LN, DIAMOND BAR, CA 91765-3441
OccupancyOwner Occupied
Owner TypeIndividual
VestingSingle Person

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleJan 10, 2001 · Amount on Record
Deed SaleJan 10, 2001 · Amount on Record
Deed Document Number200156150
Last Transfer DateApr 17, 2013
Transfer Doc0000857763
Record UpdatedSep 20, 2026

Tax Assessment & Valuation

Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 2026

Property Jurisdictions

TypeName
StateCalifornia
CountyLos Angeles County
MunicipalityDiamond Bar City
Unified School DistrictWalnut 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.

YearTax BillAssessed Value
2025$4,230.00 (+8.21%) Homeowner's exemption$302,854 (+4.04%) Land $224,659 Building $78,195
2023$3,909.00 (+2.17%) Homeowner's exemption$291,095 Land $215,936 Building $75,159
2022$3,826.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Los Angeles County (06037C), updated September 30, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood ZoneZone X
Special Flood Hazard AreaNo
Flood HazardMinimal
500-Year FloodplainNo

Wildfire

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

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

Internet Providers

Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 425 locations within about half a mile of this property

ProviderTechnologyDownload / Upload (Mbps)
FrontierFiber7,000 / 7,000
SpectrumCable1,000 / 1,000
T-Mobile USAFixed Wireless100 / 20
AT&TFixed Wireless100 / 20
StarlinkSatellite (low-earth orbit)280 / 30

May also be available at this address: Verizon, Spectrum. Availability varies by address; speeds are provider-advertised maximums, not measured.

Mobile Coverage

5G and 4G LTE

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