Los Angeles County property record for 20948 Cornerstone Dr, Walnut, CA 91789 · Last verified June 2026
| Property Type | Condominium |
|---|---|
| Details | 4 bd · 3 ba · 1,830 sqft · built 2018 |
| Lot Size | 0.401 acres (17,451 sqft) |
| Owner | Individual Name on File |
| Last Sale | $820,000 (Sep 2021) |
| Tax Bill | $10,785 (2025) |
| Deeds & Mortgages | Sep 2021 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 8720-047-123 |
| Primary APN | 8720-047-123 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 1,830 sqft Living Area |
| Year Built | Built 2018 |
|---|---|
| Effective Year Built | Effective 2018 |
| Architectural Style | Condo/Apartment |
| Construction Type | Wood |
| Lot Area | 17,451 sqft (0.401 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Central |
| Old Parcel Number | 8720047055 |
|---|---|
| Street Address | 20948 CORNERSTONE DR |
| City | WALNUT |
| State | CA |
| Zip | 91789-2567 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Legal Description | TR=73294 LOT 40 PH 8 CONDO UNIT 17 (AIRSPACE AND 1/9 INT IN COMMON AREA) |
| Legal Subdivision | GALLERY AT CORNERSTONE |
| Legal Tract | 73294 |
| Legal Block | 2 |
| Legal Lot Number | 40 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 403402 |
Source: Los Angeles County records · APN 8720-047-123
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 | Individual Name on File |
|---|---|
| Mailing Address | 20948 CORNERSTONE DR, WALNUT, CA 91789-2567 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Sep 10, 2021 · Amount on Record |
| Deed Sale | Sep 10, 2021 · Amount on Record |
| Prior Sale | Mar 08, 2018 · Amount on Record |
| Deed Document Number | 20211387404 |
| Prior Transfer Date | Feb 28, 2018 |
| Prior Transfer Doc | 0000226966 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Sep 10, 2021 |
| Property Address | 20948 CORNERSTONE DR, WALNUT, CA 91789-2567 |
| Document Number | 0001387404 |
| Map Reference | MB 1390 PG 37-44 |
| Instrument Date | Aug 13, 2021 |
| Instrument | 21-1387404 |
| Transaction Type | Transfer |
| Record Updated | Sep 20, 2021 |
| Title Company | STEWART TITLE |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 20948 CORNERSTONE DR, WALNUT, CA 91789-2567 |
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 | 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 | $10,785.00 (+6.96%) Homeowner's exemption | $870,188 (+4.04%) Land $536,758 Building $333,430 |
| 2023 | $10,083.00 (+2.12%) | $836,400 Land $515,916 Building $320,484 |
| 2022 | $9,874.00 |
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 | 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.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 549 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 |
| Starlink | Satellite (low-earth orbit) | 280 / 30 |
May also be available at this address: California Internet, Spectrum. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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