Los Angeles County property record for 23420 Robinbrook Pl, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,252 sqft · built 1976 |
| Lot Size | 0.187 acres (8,156 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $638,000 (Jun 2004) |
| Tax Bill | $11,419 (2025) |
| Deeds & Mortgages | Jun 2020 Mortgage Jun 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 8702-005-055 |
| Primary APN | 8702-005-055 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 2,252 sqft Living Area |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 1976 |
| Construction Type | Wood |
| Lot Area | 8,156 sqft (0.187 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 23420 ROBINBROOK PL |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-2634 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCR18000* |
| Legal Description | TRACT NO 31063 LOT 24 |
| Legal Subdivision | 31063 |
| Legal Tract | 31063 |
| Legal Block | 3 |
| Legal Lot Number | 24 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 403324 |
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 | 23420 ROBINBROOK PL, DIAMOND BAR, CA 91765-2634 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Jun 16, 2020 | Deed of Trust, Mortgage · Conventional Mortgage OWNING CORPORATION |
| Jun 12, 2020 | Deed of Trust, Mortgage · Conventional Mortgage OWNING CORPORATION |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 3, 2004 · Amount on Record |
| Deed Sale | Jun 3, 2004 · Amount on Record |
| Deed Document Number | 20041421366 |
| Last Transfer Date | Jul 22, 2024 |
| Transfer Doc | 0000521381 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Property Address | 23420 ROBINBROOK PL, DIAMOND BAR, CA 91765-2634 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | ORANGE COAST TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000653879 |
|---|---|
| Date | Jun 16, 2020 |
| Instrument | 20-0653879 |
| Name | OWNING CORPORATION |
|---|---|
| Type | Non-Lending Institution |
| Address | ORANGE, CA 92868 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 358 Months |
| Due | Apr 1, 2050 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Property Address | 23420 ROBINBROOK PL, DIAMOND BAR, CA 91765-2634 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | ORANGE COAST TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000644217 |
|---|---|
| Date | Jun 12, 2020 |
| Instrument | 20-0644217 |
| Name | OWNING CORPORATION |
|---|---|
| Type | Non-Lending Institution |
| Address | ORANGE, CA 92868 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 358 Months |
| Due | Apr 1, 2050 |
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 | $925,226 (+2%) Land $435,061 Building $490,165 | |
| 2025 | $11,419.00 (+7.41%) Homeowner's exemption | $907,085 (+4.04%) Land $426,531 Building $480,554 |
| 2023 | $10,631.00 (+2.13%) Homeowner's exemption | $871,864 Land $409,969 Building $461,895 |
| 2022 | $10,409.00 |
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 · 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 Policies | 1 in force |
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.
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 501 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, T-Mobile, Verizon.
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