Los Angeles County property record for 310 Willapa Ln, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,346 sqft · built 1965 |
| Lot Size | 0.228 acres (9,911 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $160,000 (Jun 1997) |
| Tax Bill | $3,978 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8703-014-031 |
| Primary APN | 8703-014-031 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,346 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1965 |
|---|---|
| Effective Year Built | Effective 1965 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Gable |
| Roof Material | Wood Shingle |
| Lot Area | 9,911 sqft (0.228 acres) |
| Lot Dimensions | 125 ft deep x 82 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 310 WILLAPA LN |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-1354 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCR108 |
| Legal Description | TRACT NO 27531 LOT 16 |
| Legal Subdivision | 27531 |
| Legal Tract | 27531 |
| Legal Block | 3 |
| Legal Lot Number | 16 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 403316 |
310 Willapa Ln is owned by a company that acquired it in May 2003 and is owner-occupied.
Source: Los Angeles County records, as of August 25, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 310 WILLAPA LN, DIAMOND BAR, CA 91765-1354 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Borrower in Default |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 26, 1997 · Amount on File |
| Deed Sale | Jun 26, 1997 · Amount on File |
| Prior Sale | Jun 7, 1994 · Amount on File |
| Deed Document Number | 1997955204 |
| Last Transfer Date | May 6, 2003 |
| Transfer Doc | 0001970353 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 310 Willapa Ln was $3,978 with a homeowner's exemption.
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 | Pomona Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $265,772 (+2%) Land $144,516 Building $121,256 | |
| 2025 | $3,978.00 Homeowner's exemption | $260,562 Land $141,683 Building $118,879 |
| 2023 | $3,585.00 (+1.64%) Homeowner's exemption | $250,446 Land $136,182 Building $114,264 |
| 2022 | $3,527.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 310 Willapa Ln in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1980.
Source: FEMA National Flood Hazard Layer, effective September 30, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 1 (1980) |
| Most Recent Claim | Feb 1980 · rainfall accumulation |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 310 Willapa Ln is low, with a 0.01% annual chance of wildfire.
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 414 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 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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