Los Angeles County property record for 21028 Granite Wells Dr, Walnut, CA 91789
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,220 sqft · built 1988 |
| Lot Size | 0.199 acres (8,662 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $694,000 (Oct 2008) |
| Tax Bill | $11,972 (2025) |
| Flood Zone | Zone D (undetermined) |
| APN | 8710-021-027 |
| Primary APN | 8710-021-027 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 2,220 sqft Living Area |
| Year Built | Built 1988 |
|---|---|
| Effective Year Built | Effective 1988 |
| Construction Type | Wood |
| Lot Area | 8,662 sqft (0.199 acres) |
| Lot Dimensions | 109 ft deep x 79 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 21028 GRANITE WELLS DR |
|---|---|
| City | WALNUT |
| State | CA |
| Zip | 91789-1360 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | WASP1* |
| Legal Description | TR=44019 LOT 48 |
| Legal Subdivision | 44019 |
| Legal Tract | 44019 |
| Legal Block | 1 |
| Legal Lot Number | 48 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 403409 |
21028 Granite Wells Dr is owned and occupied by two individuals who acquired it in August 2012.
Source: Los Angeles County records, as of August 25, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 21028 GRANITE WELLS DR, WALNUT, CA 91789-1360 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 31, 2008 · Amount on File |
| Deed Sale | Oct 31, 2008 · Amount on File |
| Prior Sale | Jul 29, 2008 · Amount on File |
| Deed Document Number | 20081936180 |
| Last Transfer Date | Aug 22, 2012 |
| Transfer Doc | 0001309453 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 21028 Granite Wells Dr was $11,972 with a homeowner's exemption.
Source: Los Angeles County assessment roll, as of August 25, 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Walnut City |
| Unified School District | Walnut Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $911,563 (+2%) Land $619,972 Building $291,591 | |
| 2025 | $11,972.00 Homeowner's exemption | $893,690 Land $607,816 Building $285,874 |
| 2023 | $11,212.00 (+1.96%) Homeowner's exemption | $858,989 Land $584,215 Building $274,774 |
| 2022 | $10,996.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 21028 Granite Wells Dr in Zone D, where flood risk has not been studied.
Source: FEMA National Flood Hazard Layer, effective September 30, 2026
| FEMA Flood Zone | Zone D undetermined · not studied |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 21028 Granite Wells Dr is low, with a 0.02% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | None beyond 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 | GSWC-SAN DIMAS private · serves 56,564 people · EPA ID CA1910142 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | May 2025 |
| Lead | 2 ppb (2024–2026) 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 300 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T, Frontier, GeoLinks, Verizon.
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