Los Angeles County property record for 578 Diamond Pl, Walnut, CA 91789
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 1,647 sqft · built 1987 |
| Lot Size | 0.215 acres (9,345 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $888,000 (Aug 2021) |
| Tax Bill | $12,102 (2025) |
| Deeds & Mortgages | Aug 2021 Sale & Mortgage Oct 2019 Mortgage |
| Flood Zone | Zone D (undetermined) |
| APN | 8734-050-018 |
| Primary APN | 8734-050-018 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 1,647 sqft Living Area |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1987 |
| Construction Type | Wood |
| Lot Area | 9,345 sqft (0.215 acres) |
| Lot Dimensions | 111 ft deep x 131 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 578 DIAMOND PL |
|---|---|
| City | WALNUT |
| State | CA |
| Zip | 91789-4727 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | WARPD14800 |
| Legal Description | TR=39514 LOT 7 |
| Legal Subdivision | 39514 |
| Legal Tract | 39514 |
| Legal Block | 3 |
| Legal Lot Number | 7 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3012 |
| Census Tract | 403408 |
Source: Los Angeles County records · APN 8734-050-018
Assessment roll updated May 21, 2026 · Last verified June 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 578 DIAMOND PL, WALNUT, CA 91789-4727 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Aug 20, 2021 | Grant Deed, Transfer · Conventional Mortgage UNI FIRST INVESTMENT INC |
| Oct 25, 2019 | Deed of Trust, Mortgage · Conventional Mortgage PS FNDG INC |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Aug 20, 2021 · Amount on Record |
| Deed Sale | Aug 20, 2021 · Amount on Record |
| Prior Sale | Mar 04, 1996 · Amount on Record |
| Deed Document Number | 20211280961 |
| Prior Transfer Date | Nov 03, 2003 |
| Prior Transfer Doc | 0003492110 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Aug 20, 2021 |
| Property Address | 578 DIAMOND PL, WALNUT, CA 91789-4727 |
| Document Number | 0001280961 |
| Map Reference | MB 1034 PG 93-95 |
| Instrument Date | Jul 30, 2021 |
| Instrument | 21-1280961 |
| Transaction Type | Transfer |
| Record Updated | Sep 01, 2021 |
| Title Company | LANDWOOD TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 578 DIAMOND PL, WALNUT, CA 91789-4727 |
| Document Number | 0001280962 |
|---|---|
| Date | Aug 20, 2021 |
| Instrument | 21-1280962 |
| Name | UNI FIRST INVESTMENT INC |
|---|---|
| Type | Non-Lending Institution |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Sep 01, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Property Address | 578 DIAMOND PL, WALNUT, CA 91789-4727 |
| Document Number | 0001181433 |
| Instrument Date | Oct 25, 2019 |
| Transaction Type | Mortgage |
| Record Updated | Nov 07, 2019 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NAT'L TITLE ORANGE CN |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 403 VISTA RAMBLA WALNUT CA 917892130, WALNUT, CA 91789-2130 |
| Document Number | 0001181433 |
|---|---|
| Date | Nov 01, 2019 |
| Instrument | 1181433 |
| Name | PS FNDG INC |
|---|---|
| Address | EL SEGUNDO, CA 90245 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 24 Months |
| Due | Oct 31, 2021 |
Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Walnut City |
| Unified School District | Rowland 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 | $12,102.00 (+6.84%) Homeowner's exemption | $942,352 (+4.04%) Land $753,882 Building $188,470 |
| 2023 | $11,327.00 (+2.16%) Homeowner's exemption | $905,760 Land $724,608 Building $181,152 |
| 2022 | $11,087.00 |
Source: FEMA National Flood Hazard Layer as of September 30, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone D undetermined · not studied |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Wildfire Risk | Low lower than 99.8% of the US · lower than 99.8% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: California Internet.
Based on FCC filings for 688 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | SUBURBAN WATER SYSTEMS-SAN JOSE private · serves 170,523 people |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Aug 2024 |
| Also Mapped Here | THREE VALLEYS MWD |
| Lead | Under 1 ppb (2023–2025) 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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