Los Angeles County property record for 641 Alder Ln, Diamond Bar, CA 91789
| Property Type | Planned Unit Development |
|---|---|
| Details | 2 bd · 3 ba · 1,368 sqft · built 1986 |
| Lot Size | 0.034 acres (1,459 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $645,000 (Jul 2024) |
| Tax Bill | $8,100 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8719-018-053 |
| Primary APN | 8719-018-053 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 1,368 sqft Living Area |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1986 |
| Construction Type | Wood |
| Lot Area | 1,459 sqft (0.034 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 641 ALDER LN |
|---|---|
| City | WALNUT |
| State | CA |
| Zip | 91789-3346 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Planned Unit Development |
| Local Zoning Code | LCR312UDP* |
| Legal Description | TR=39833 LOT 53 |
| Legal Subdivision | 39833 |
| Legal Tract | 39833 |
| Legal Block | 3 |
| Legal Lot Number | 53 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 403328 |
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 | 641 ALDER LN, WALNUT, CA 91789-3346 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 31, 2024 · Amount on Record |
| Deed Sale | Jul 31, 2024 · Amount on Record |
| Deed Document Number | 2024510653 |
| Prior Transfer Date | Jul 24, 2024 |
| Prior Transfer Doc | 0000510652 |
| Record Updated | Oct 29, 2026 |
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 | $657,900 (+2%) Land $430,236 Building $227,664 | |
| 2025 | $8,100.00 (+493.41%) Homeowner's exemption | $645,000 (+689.43%) Land $421,800 Building $223,200 |
| 2023 | $1,365.00 (+2.48%) Homeowner's exemption | $81,705 Land $25,183 Building $56,522 |
| 2022 | $1,332.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
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 96% of the US · lower than 97.4% of California |
|---|---|
| Wildfire Likelihood | 0.02% 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 200 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 7,000 / 7,000 |
| Spectrum Cable | 1,000 / 1,000 |
May also be available: GeoLinks, T-Mobile, Verizon.
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