Los Angeles County property record for 1258 Blenarm Dr, Diamond Bar, CA 91789 · Last verified June 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,250 sqft · built 1979 |
| Lot Size | 0.515 acres (22,445 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $5,659 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 8763-015-021 |
| Primary APN | 8763-015-021 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,250 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1979 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Wood Shingle |
| Lot Area | 22,445 sqft (0.515 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Water Source | Commercial |
| Street Address | 1258 BLENARM DR |
|---|---|
| City | WALNUT |
| State | CA |
| Zip | 91789-3802 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | *TR=32091 LOT 45 |
| Legal Subdivision | 32091 |
| Legal Tract | 32091 |
| Legal Block | 3 |
| Legal Lot Number | 45 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | EAST SAN GABRIEL VALLEY |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 408707 |
Source: Los Angeles County records · APN 8763-015-021
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 | 2 Company Names on File |
|---|---|
| Mailing Address | 1258 BLENARM DR, WALNUT, CA 91789-3802 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Community Property |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Transfer Date | Sep 29, 2015 |
| Transfer Doc | 0001590745 |
| Record Updated | Sep 20, 2026 |
Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | California |
| County | Los Angeles County |
| Municipality | Diamond Bar 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 | $5,659.00 (+8.58%) Homeowner's exemption | $411,536 (+4.04%) Land $196,082 Building $215,454 |
| 2023 | $5,212.00 (+2.14%) Homeowner's exemption | $395,558 Land $188,469 Building $207,089 |
| 2022 | $5,103.00 |
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 496 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 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
| Starlink | Satellite (low-earth orbit) | 280 / 30 |
May also be available at this address: Verizon, California Internet. Availability varies by address; speeds are provider-advertised maximums, not measured.
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