Los Angeles County property record for 504 Jon Ct, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 5 ba · 2,700 sqft · built 1987 |
| Lot Size | 0.177 acres (7,698 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $354,000 (May 2003) |
| Tax Bill | $8,824 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8281-038-032 |
| Primary APN | 8281-038-032 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 5 Baths |
| Building Area | 2,700 sqft Living Area |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 2008 |
| Construction Type | Wood |
| Lot Area | 7,698 sqft (0.177 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 504 JON CT |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-1851 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCR115000- |
| Legal Description | TR=42579 LOT 46 |
| Legal Subdivision | 42579 |
| Legal Tract | 42579 |
| Legal Block | 1 |
| Legal Lot Number | 46 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 403321 |
Source: Los Angeles County assessment roll, as of May 21, 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 File |
|---|---|
| Mailing Address | 504 JON CT, DIAMOND BAR, CA 91765-1851 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Living Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | May 12, 2003 · Amount on Record |
| Deed Sale | May 12, 2003 · Amount on Record |
| Deed Document Number | 20031340287 |
| Last Transfer Date | Aug 16, 2013 |
| Transfer Doc | 0001323317 |
| Record Updated | Sep 20, 2026 |
Source: Los Angeles County assessment roll, as of May 21, 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 |
|---|---|---|
| 2025 | $8,824.00 (+11.89%) Homeowner's exemption | $635,983 (+4.04%) Land $223,035 Building $412,948 |
| 2023 | $7,886.00 (+1.58%) Homeowner's exemption | $611,288 Land $214,375 Building $396,913 |
| 2022 | $7,763.00 |
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 | Moderate above 46% of the US · lower than 72% of California |
|---|---|
| Wildfire Likelihood | 0.08% annual chance |
| Exposure | Direct burnable vegetation at the parcel |
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 487 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 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: California Internet.
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