Los Angeles County property record for 923 E Mariposa St, Altadena, CA 91001 · Last verified June 2026
| Property Type | Duplex |
|---|---|
| Details | 19 bd · 16 ba · 11,134 sqft · built 1947 |
| Lot Size | 0.654 acres (28,501 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $5,833 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 5845-001-009 |
| Primary APN | 5845-001-009 |
|---|
| Bedrooms | 19 Beds |
|---|---|
| Full Baths | 16 Baths |
| Units | 10 Units |
| Stories | 2 Stories |
| Building Area | 11,134 sqft Living Area |
| Year Built | Built 1947 |
|---|---|
| Effective Year Built | Effective 1947 |
| Architectural Style | Duplex Single |
| Construction Type | Wood |
| Lot Area | 28,501 sqft (0.654 acres) |
| Total Buildings | 4 Buildings |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Street Address | 923 E MARIPOSA ST |
|---|---|
| City | ALTADENA |
| State | CA |
| Zip | 91001-2017 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | TRACT # 7832 LOT COM AT SE COR OF LOT 15 TH N 0 1020 E 285 FT TH W TO A PT IN W LINE OF SD LOT S THEREON 15 FT FROM SW COR OF LOT 10 TH S AND FOLLOWING BDRY LINE OF SD LOT 15 TO BEG PART OF LOT 15 |
| Legal Subdivision | 7832 |
| Legal Tract | 7832 |
| Legal Block | 4 |
| Legal Lot Number | 15 |
| Jurisdiction | LOS ANGELES CA |
| Township / Civil Division | PASADENA |
| Census Block Group | 4 |
| Census Block | 4003 |
| Census Tract | 460101 |
Source: Los Angeles County records · APN 5845-001-009
Assessment roll updated May 21, 2026 · Last verified June 2026
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| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 923 E MARIPOSA ST, ALTADENA, CA 91001-2017 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Sep 18, 1996 |
| Deed Sale | Sep 18, 1996 |
| Deed Document Number | 19961535141 |
| Last Transfer Date | Mar 17, 2011 |
| Transfer Doc | 0000451586 |
| 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 | $5,833.00 (-60.53%) | $310,676 (-64.48%) Land $310,676 |
| 2024 | $14,777.00 (+4.53%) | |
| 2023 | $14,136.00 (+3.1%) | $874,610 Land $459,411 Building $415,199 |
| 2022 | $13,711.00 |
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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