Los Angeles County property record for 21211 Mapache Dr, Diamond Bar, CA 91765
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,858 sqft · built 1963 |
| Lot Size | 0.234 acres (10,186 sqft) |
| Owner | Company Name on Record |
| Last Sale | $725,000 (Oct 2016) |
| Tax Bill | $10,742 (2025) |
| Deeds & Mortgages | Mar 2020 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 8285-022-019 |
| Primary APN | 8285-022-019 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 1,858 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1963 |
|---|---|
| Effective Year Built | Effective 1964 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Hip |
| Roof Material | Wood Shingle |
| Lot Area | 10,186 sqft (0.234 acres) |
| Lot Dimensions | 140 ft deep x 73 ft wide |
| Heating System | Central |
|---|
| Street Address | 21211 MAPACHE DR |
|---|---|
| City | DIAMOND BAR |
| State | CA |
| Zip | 91765-3424 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | LCR17500* |
| Legal Description | TRACT NO 25991 LOT 103 |
| Legal Subdivision | 25991 |
| Legal Tract | 25991 |
| Legal Block | 1 |
| Legal Lot Number | 103 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 1 |
| Census Block | 1016 |
| Census Tract | 403325 |
Source: Los Angeles County records, 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 | Company Name on Record |
|---|---|
| Mailing Address | 2325 RAINER AVE, ROWLAND HEIGHTS, CA 91748-4548 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 12, 2016 · Amount on Record |
| Deed Sale | Oct 12, 2016 · Amount on Record |
| Prior Sale | Mar 29, 2016 · Amount on Record |
| Deed Document Number | 20161250025 |
| Prior Transfer Date | Dec 1, 2006 |
| Prior Transfer Doc | 0002753018 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | LOS ANGELES CA |
| Recording Date | Mar 3, 2020 |
| Property Address | 21211 MAPACHE DR, DIAMOND BAR, CA 91765-3424 |
| Document Number | 0000250790 |
| Instrument Date | Oct 18, 2019 |
| Instrument | 250790 |
| Transaction Type | Transfer |
| Record Updated | Mar 10, 2020 |
| Title Company | NOT AVAILABLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 2325 RAINER AVE ROWLAND HEIGHTS CA 917484548, ROWLAND HEIGHTS, CA 91748-4548 |
Source: Los Angeles County assessment roll, as of May 21, 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 |
|---|---|---|
| 2025 | $10,742.00 (+4.75%) | $841,417 (+4.04%) Land $527,367 Building $314,050 |
| 2024 | $10,255.00 (+2.45%) | |
| 2023 | $10,010.00 (+0.61%) | $808,746 Land $506,890 Building $301,856 |
| 2022 | $9,949.00 |
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 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 66% of the US · lower than 80% of California |
|---|---|
| Wildfire Likelihood | 0.03% 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 | 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 425 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 7,000 / 7,000 |
| 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: Verizon.
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