Los Angeles County property record for 21230 Cold Spring Ln, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,720 sqft · built 1962 |
| Lot Size | 0.178 acres (7,754 sqft) |
| Owner | Company Name on Record |
| Last Sale | $460,000 (Jul 2011) |
| Tax Bill | $7,557 (2025) |
| Deeds & Mortgages | Jan 2021 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 8285-025-005 |
| Primary APN | 8285-025-005 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,720 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1963 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Hip |
| Roof Material | Wood Shingle |
| Lot Area | 7,754 sqft (0.178 acres) |
| Lot Dimensions | 69 ft deep x 2 ft wide |
| Cooling System | Wall Unit |
|---|---|
| Heating System | Central |
| Water Source | Commercial |
| Street Address | 21230 COLD SPRING LN |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-3440 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCR17500* |
| Legal Description | TRACT # 25985 LOT 5 |
| Legal Subdivision | 25985 |
| Legal Tract | 25985 |
| Legal Block | 1 |
| Legal Lot Number | 5 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 1 |
| Census Block | 1011 |
| Census Tract | 403325 |
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 | Company Name on Record |
|---|---|
| Mailing Address | 2704 S GEORGE LN, WALNUT, CA 91789-4062 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 1, 2011 · Amount on Record |
| Deed Sale | Jul 1, 2011 · Amount on Record |
| Prior Sale | Jun 22, 2001 · Amount on Record |
| Deed Document Number | 2011896719 |
| Last Transfer Date | Jan 21, 2015 |
| Transfer Doc | 0001035468 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Property Address | 21230 COLD SPRING LN, DIAMOND BAR, CA 91765-3440 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | CHICAGO TITLE |
| Name | Verified Name |
|---|---|
| Address | 2579 HIGHGATE CT, CHINO HILLS, CA 91709-1137 |
| Document Number | 0000059900 |
|---|---|
| Date | Jan 12, 2021 |
| Instrument | 21-0059900 |
| Name | CATHAY BANK |
|---|---|
| Type | Bank |
| Address | EL MONTE, CA 91731 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
Source: Los Angeles County assessment roll, as of August 25, 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Diamond Bar City |
| Unified School District | Walnut Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $589,328 (+2%) Land $352,316 Building $237,012 | |
| 2025 | $7,557.00 (+7.71%) | $577,773 (+4.04%) Land $345,408 Building $232,365 |
| 2023 | $7,016.00 (+2.14%) | $555,340 Land $331,997 Building $223,343 |
| 2022 | $6,869.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| 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 cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
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 |
| 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.
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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