Los Angeles County property record for 20573 Gernside Dr, Diamond Bar, CA 91789 · Last verified June 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,304 sqft · built 1975 |
| Lot Size | 0.221 acres (9,603 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $870,000 (Jan 2020) |
| Tax Bill | $11,967 (2025) |
| Deeds & Mortgages | Dec 2020 Mortgage Jan 2020 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 8763-021-002 |
| Primary APN | 8763-021-002 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,304 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1975 |
|---|---|
| Effective Year Built | Effective 1975 |
| Architectural Style | Bungalow |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Wood Shingle |
| Lot Area | 9,603 sqft (0.221 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 20573 GERNSIDE DR |
|---|---|
| City | WALNUT |
| State | CA |
| Zip | 91789-3740 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT NO 32109 LOT 104 |
| Legal Subdivision | 32109 |
| Legal Tract | 32109 |
| Legal Block | 3 |
| Legal Lot Number | 104 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3009 |
| Census Tract | 408707 |
Source: Los Angeles County records · APN 8763-021-002
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 | 20573 GERNSIDE DR, WALNUT, CA 91789-3740 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Dec 09, 2020 | Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LOANS LLC |
| Jan 03, 2020 | Grant Deed, Transfer · Conventional Mortgage QUICKEN LNS |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jan 03, 2020 · Amount on Record |
| Deed Sale | Jan 03, 2020 · Amount on Record |
| Prior Sale | Oct 14, 2011 · Amount on Record |
| Deed Document Number | 20206805 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Property Address | 20573 GERNSIDE DR, DIAMOND BAR, CA 91789-3740 |
| Transaction Type | Mortgage |
| Record Updated | Feb 05, 2021 |
| Title Company | CHICAGO TITLE |
| Name | Verified Name |
|---|---|
| Address | 20573 GERNSIDE DR, WALNUT, CA 91789-3740 |
| Document Number | 0001613817 |
|---|---|
| Date | Dec 09, 2020 |
| Instrument | 20-1613817 |
| Name | QUICKEN LOANS LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 348 Months |
| Due | Dec 01, 2049 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Jan 03, 2020 |
| Property Address | 20573 GERNSIDE DR, DIAMOND BAR, CA 91789-3740 |
| Document Number | 0000006805 |
| Instrument Date | Dec 20, 2019 |
| Instrument | 6805 |
| Transaction Type | Transfer |
| Record Updated | Jan 14, 2020 |
| Title Company | EQUITY TITLE COMPANY, EQUITY TITLE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $957.00 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 20573 GERNSIDE DR DIAMOND BAR CA 917893740, DIAMOND BAR, CA 91789-3740 |
| Document Number | 6806 |
|---|---|
| Date | Jan 03, 2020 |
| Instrument | 6806 |
| Name | QUICKEN LNS |
|---|---|
| Type | Funding / Finance Company |
| Address | DETROIT, MI 48226-1906 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Jan 02, 2050 |
Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Diamond Bar City |
| Unified School District | Walnut Valley 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 | $11,967.00 (+7.35%) Homeowner's exemption | $951,467 (+4.04%) Land $546,274 Building $405,193 |
| 2023 | $11,148.00 (+2.13%) Homeowner's exemption | $914,522 Land $525,062 Building $389,460 |
| 2022 | $10,916.00 |
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 |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
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