Los Angeles County property record for 21099 Chirping Sparrow Rd, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,558 sqft · built 1983 |
| Lot Size | 0.252 acres (10,979 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $378,000 (Sep 2001) |
| Tax Bill | $7,540 (2025) |
| Deeds & Mortgages | Sep 2019 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 8714-020-039 |
| Primary APN | 8714-020-039 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 2,558 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1983 |
|---|---|
| Effective Year Built | Effective 1983 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Gable |
| Roof Material | Tile |
| Lot Area | 10,979 sqft (0.252 acres) |
| Lot Dimensions | 150 ft deep x 72 ft wide |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 21099 CHIRPING SPARROW RD |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-3769 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCR19000* |
| Legal Description | *TR=29053 LOT 45 |
| Legal Subdivision | 29053 |
| Legal Tract | 29053 |
| Legal Block | 2 |
| Legal Lot Number | 45 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 2 |
| Census Block | 2012 |
| Census Tract | 403325 |
21099 Chirping Sparrow Rd is owner-occupied and held in a trust since August 2019.
Source: Los Angeles County records, as of August 25, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 21099 CHIRPING SPARROW RD, DIAMOND BAR, CA 91765-3769 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
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 | Sep 5, 2001 · Amount on File |
| Deed Sale | Sep 5, 2001 · Amount on File |
| Deed Document Number | 20011667041 |
| Last Transfer Date | Aug 16, 2019 |
| Transfer Doc | 0000973525 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Sep 18, 2019 |
| Property Address | 21099 CHIRPING SPARROW RD, DIAMOND BAR, CA 91765-3769 |
| Document Number | 0000973525 |
| Instrument Date | Aug 16, 2019 |
| Instrument | 973525 |
| Transaction Type | Transfer |
| Record Updated | Sep 25, 2019 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 21099 CHIRPING SPARROW RD DIAMOND BAR CA 917653769, DIAMOND BAR, CA 91765-3769 |
| Investor | Possibly a Property Investor |
The 2025 property tax bill for 21099 Chirping Sparrow Rd was $7,540 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 | Diamond Bar City |
| Unified School District | Walnut Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $569,565 (+2%) Land $259,467 Building $310,098 | |
| 2025 | $7,540.00 Homeowner's exemption | $558,398 Land $254,380 Building $304,018 |
| 2023 | $6,799.00 (+2.15%) Homeowner's exemption | $536,716 Land $244,503 Building $292,213 |
| 2022 | $6,656.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 21099 Chirping Sparrow Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 30, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| 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 21099 Chirping Sparrow Rd is high, ranking above 71% of the US, with a 0.3% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 71% of the US · above 46% of California |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | 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 565 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Frontier, Verizon.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures