Los Angeles County property record for 10508 Mattock Ave, Downey, CA 90241
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 1,952 sqft · built 1950 |
| Lot Size | 0.21 acres (9,147 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $5,454 (2025) |
| Flood Zone | Zone X (reduced by levee) |
| APN | 6287-017-001 |
| Primary APN | 6287-017-001 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,952 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | Conventional |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Gable |
| Roof Material | Gravel |
| Lot Area | 9,147 sqft (0.21 acres) |
| Lot Dimensions | 133 ft deep x 74 ft wide |
| Total Buildings | 2 Buildings |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Street Address | 10508 MATTOCK AVE |
|---|---|
| City | DOWNEY |
| State | CA |
| Zip | 90241-3029 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | DOR17500 |
| Legal Description | TRACT # 13441 LOT 157 |
| Legal Subdivision | 13441 |
| Legal Tract | 13441 |
| Legal Block | 2 |
| Legal Lot Number | 157 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | DOWNEY-NORWALK |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 551001 |
Source: Los Angeles County records · APN 6287-017-001
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 | PO BOX 5103, CERRITOS, CA 90703-5103 |
| Owner Type | Company |
| Vesting | Single Person |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Transfer Date | Dec 13, 2012 |
| Transfer Doc | 0001945057 |
| 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 | Downey City |
| Unified School District | Downey 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 | $5,454.00 (+2.1%) | $388,586 (+4.04%) Land $213,377 Building $175,209 |
| 2024 | $5,342.00 (+3.29%) | |
| 2023 | $5,172.00 (+7.39%) | $373,499 Land $205,093 Building $168,406 |
| 2022 | $4,816.00 |
Source: FEMA National Flood Hazard Layer, Los Angeles County (06037C), as of September 30, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X reduced by levee · depends on levee performance |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 7,000 / 7,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
Based on FCC filings for 486 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System, water system CA1910034, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | DOWNEY - CITY, WATER DEPT. serves 110,556 people |
|---|---|
| Water Source | Groundwater |
| Lead | Under 1 ppb (2021–2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Coliform assessment Feb 2018 |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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