Los Angeles County property record for 21117 Stonybrook Dr, Walnut, CA 91789
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4 ba · 2,789 sqft · built 1988 |
| Lot Size | 1 acres (43,842 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $620,000 (Aug 2001) |
| Tax Bill | $12,046 (2025) |
| Flood Zone | Zone D (undetermined) |
| APN | 8709-061-036 |
| Primary APN | 8709-061-036 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 2,789 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1988 |
|---|---|
| Effective Year Built | Effective 1988 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Tile |
| Lot Area | 43,842 sqft |
| Lot Dimensions | 465 ft deep x 137 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 21117 STONYBROOK DR |
|---|---|
| City | WALNUT |
| State | CA |
| Zip | 91789-5016 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | WARPD28500 |
| Legal Description | TR=40716 LOT 36 |
| Legal Subdivision | 40716 |
| Legal Tract | 40716 |
| Legal Block | 3 |
| Legal Lot Number | 36 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 403403 |
Source: Los Angeles County assessment roll, as of May 21, 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 | 21117 STONYBROOK DR, WALNUT, CA 91789-5016 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Aug 22, 2001 · Amount on Record |
| Deed Sale | Aug 22, 2001 · Amount on Record |
| Deed Document Number | 20011563833 |
| Last Transfer Date | May 18, 2012 |
| Transfer Doc | 0000802283 |
| Record Updated | Sep 20, 2026 |
Source: Los Angeles County assessment roll, as of May 21, 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 |
|---|---|---|
| 2025 | $12,046.00 (+7.61%) | $915,904 (+4.04%) Land $502,270 Building $413,634 |
| 2023 | $11,194.00 (+2.02%) | $880,340 Land $482,767 Building $397,573 |
| 2022 | $10,972.00 |
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
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 62% of the US · lower than 77% of California |
|---|---|
| Wildfire Likelihood | 0.06% annual chance |
| Exposure | Direct burnable vegetation at the parcel |
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 260 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Frontier, T-Mobile USA.
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