Los Angeles County property record for 503 Jon Ct, Diamond Bar, CA 91765 · Last verified August 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4 ba · 2,097 sqft · built 1987 |
| Lot Size | 0.962 acres (41,919 sqft) |
| Owner | Company Name on File |
| Tax Bill | $6,694 (2025) |
| Deeds & Mortgages | Mar 2023 Transfer Dec 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 8281-038-029 |
| Primary APN | 8281-038-029 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 2,097 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1988 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Tile |
| Lot Area | 41,919 sqft (0.962 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 503 JON CT |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-1851 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TR=42579 LOT 43 |
| Legal Subdivision | 42579 |
| Legal Tract | 42579 |
| Legal Block | 1 |
| Legal Lot Number | 43 |
| 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 records · APN 8281-038-029
Assessment roll updated May 21, 2026 · Last verified August 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 File |
|---|---|
| Mailing Address | 503 JON CT, DIAMOND BAR, CA 91765-1851 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
| Date | Document |
|---|---|
| Mar 17, 2023 | Intrafamily Transfer, Transfer WFG NATIONAL TITLE CO OF CA |
| Dec 01, 2020 | Intrafamily Transfer, Transfer · Conventional Mortgage CALCULATED RISK ANALYTICS LLC |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | Mar 08, 2023 |
| Transfer Doc | 0000174545 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Mar 17, 2023 |
| Property Address | 503 JON CT, DIAMOND BAR, CA 91765-1851 |
| Document Number | 0000174545 |
| Map Reference | MB 1033 PG 93-97 |
| Instrument Date | Mar 08, 2023 |
| Instrument | 23-0174545 |
| Transaction Type | Transfer |
| Record Updated | Jun 07, 2023 |
| Title Company | WFG NATIONAL TITLE CO OF CA |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 503 JON CT, DIAMOND BAR, CA 91765-1851 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Dec 01, 2020 |
| Property Address | 503 JON CT, DIAMOND BAR, CA 91765-1851 |
| Document Number | 0001547587 |
| Map Reference | MB 1033 PG 93-97 |
| Instrument Date | Nov 21, 2020 |
| Instrument | 20-1547587 |
| Transaction Type | Transfer |
| Record Updated | Sep 22, 2021 |
| Title Company | WFG NATIONAL TITLE CO OF CA |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 503 JON CT, DIAMOND BAR, CA 91765-1851 |
| Document Number | 0001547588 |
|---|---|
| Date | Dec 01, 2020 |
| Instrument | 20-1547588 |
| Name | CALCULATED RISK ANALYTICS LLC |
|---|---|
| Type | Non-Lending Institution |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Dec 01, 2050 |
Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Diamond Bar City |
| Unified School District | Pomona Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $6,694.00 (+13.4%) Homeowner's exemption | $453,895 (+4.04%) Land $132,046 Building $321,849 |
| 2023 | $5,903.00 (+2.46%) Homeowner's exemption | $436,271 Land $126,919 Building $309,352 |
| 2022 | $5,761.00 |
Source: FEMA National Flood Hazard Layer, Los Angeles County (06037C), updated September 30, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | Moderate above 46% of the US · above 27% of California |
|---|---|
| Wildfire Likelihood | About 1 in 1,299 per year |
| Exposure | Direct burnable vegetation at the parcel |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 487 locations within about half a mile of this property
| Provider | Technology | Download / Upload (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 at this address: California Internet. Availability varies by address; speeds are provider-advertised maximums, not measured.
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