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3707 El Sereno Ave, Altadena
APN 5831-009-010 · map page 5831-009
A 10,327 sq ft residential lot with no building on the tax roll at 3707 El Sereno Ave in Altadena, Los Angeles County (APN 5831-009-010). It burned in the Eaton Fire (2025), and 2 earlier mapped fires reached it. It is in a Very High CAL FIRE hazard zone and outside the FEMA flood zone (zone X). It is zoned R-1-7500 (single-family residence) by Los Angeles County. It is assessed at $21,596, with a yearly tax bill of $927. Property taxes are in default since 2026, with $816 owed.
Risk Assessment
Flood
Zone X — AREA OF MINIMAL FLOOD HAZARD
Outside flood zone
Low Risk
Fire
CAL FIRE hazard severity zone
Very High
High Risk
Past Fires
3 mapped fires since 1900
Eaton Fire, 2025
High Risk
Property Details
- APN
- 5831-009-010
- Area
- Altadena, Los Angeles County
- Zoning
- R-1-7500 · Single-Family Residence
- Assessor Use
- Single (0100)
Solar
4,446 hrs/yr
Excellent
Weather & Climate
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Taxes
- Tax Status
- Tax defaulted
- Yearly Tax Bill
- $927
- Year Defaulted
- 2026
- Owed to Redeem
- $816
From the LA County Treasurer and Tax Collector's rolls, checked Oct 19, 2026.
Tax Assessment History
| Year | Land | Improvement | Total |
|---|---|---|---|
| 2025 | $21,173 | $0 | $21,173 |
| 2024 | $31,936 | $63,694 | $95,630 |
| 2023 | $31,310 | $62,446 | $93,756 |
| 2022 | $30,697 | $61,222 | $91,919 |
| 2021 | $30,096 | $60,022 | $90,118 |
| 2020 | $29,788 | $59,407 | $89,195 |
| 2019 | $29,204 | $58,243 | $87,447 |
| 2018 | $28,632 | $57,101 | $85,733 |
| 2017 | $28,071 | $55,982 | $84,053 |
| 2016 | $27,521 | $54,885 | $82,406 |
Owner
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Full parcel report · $29
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Official record: county assessor