Los Angeles County property record for 671 Alder Ln, Diamond Bar, CA 91789
| Property Type | Planned Unit Development |
|---|---|
| Details | 2 bd · 2 ba · 1,280 sqft · built 1986 |
| Lot Size | 0.033 acres (1,446 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $224,000 (Oct 2002) |
| Tax Bill | $4,383 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8719-018-064 |
| Primary APN | 8719-018-064 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 1,280 sqft Living Area |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1986 |
| Construction Type | Wood |
| Lot Area | 1,446 sqft (0.033 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 671 ALDER LN |
|---|---|
| City | WALNUT |
| State | CA |
| Zip | 91789-3347 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Planned Unit Development |
| Local Zoning Code | LCR312UDP* |
| Legal Description | TR=39833 LOT 64 |
| Legal Subdivision | ALPHA PLUS TOWNHOMES |
| Legal Tract | 39833 |
| Legal Block | 3 |
| Legal Lot Number | 64 |
| 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 Company Names on Record |
|---|---|
| Mailing Address | 671 ALDER LN, WALNUT, CA 91789-3347 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 17, 2002 · Amount on Record |
| Deed Sale | Oct 17, 2002 · Amount on Record |
| Deed Document Number | 20022436115 |
| Last Transfer Date | Sep 30, 2024 |
| Transfer Doc | 0000739886 |
| 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 | $330,891 (+2%) Land $264,720 Building $66,171 | |
| 2025 | $4,383.00 (+8.28%) Homeowner's exemption | $324,404 (+4.04%) Land $259,530 Building $64,874 |
| 2023 | $4,048.00 (+0.95%) Homeowner's exemption | $311,808 Land $249,453 Building $62,355 |
| 2022 | $4,010.00 |
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 | Not rated no burnable land within 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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