Los Angeles County property record for 643 E Mariposa St, Altadena, CA 91001 · Last verified June 2026
| Property Type | Single Family Home |
|---|---|
| Details | 10 bd · 7 ba · 8,393 sqft · built 1920 |
| Lot Size | 0.682 acres (29,686 sqft) |
| Owner | Company Name on File |
| Tax Bill | $4,148 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 5840-003-002 |
| Primary APN | 5840-003-002 |
|---|
| Bedrooms | 10 Beds |
|---|---|
| Full Baths | 7 Baths |
| Total Rooms | 24 Rooms |
| Building Area | 8,393 sqft Living Area |
| Stories | 2 Stories |
| Fireplace | Fireplace |
| Fireplaces | 1 Fireplace |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 1920 |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Flat |
| Roof Material | Rolled Roofing |
| Lot Area | 29,686 sqft (0.682 acres) |
| Lot Dimensions | 250 ft deep x 119 ft wide |
| Heating System | Central |
|---|
| Street Address | 643 E MARIPOSA ST |
|---|---|
| City | ALTADENA |
| State | CA |
| Zip | 91001-2350 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MAP 1 ALTADENA LOT 2 BLK 12 |
| Legal Subdivision | ALTADENA |
| Legal Block | 12 |
| Legal Lot Number | 2 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | PASADENA |
| Census Block Group | 4 |
| Census Block | 4005 |
| Census Tract | 460200 |
Source: Los Angeles County records · APN 5840-003-002
Assessment roll updated May 21, 2026 · Last verified June 2026
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| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 643 E MARIPOSA ST, ALTADENA, CA 91001-2350 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| 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 |
| Unified School District | Pasadena 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 | $4,148.00 (+39.62%) | $425,819 (-12.97%) Land $53,170 Building $372,649 |
| 2023 | $2,971.00 (-5.59%) | $489,286 Land $51,106 Building $438,180 |
| 2022 | $3,147.00 |
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 |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | 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.
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