Wildfire Zones: Altadena vs Pomona
How do wildfire zones rules compare between Altadena, CA and Pomona, CA?
Pomona has fewer restrictions than Altadena.
Altadena, CA
Los Angeles County
Most of Altadena sits in CalFire-mapped Very High and High Fire Hazard Severity Zones — the January 2025 Eaton Fire destroyed thousands of structures here. Properties in these zones face heightened defensible-space, ember-resistant construction, and disclosure requirements.
View full Altadena rules →Pomona, CA
Los Angeles County
Portions of northern Pomona near the foothills are in or near fire hazard severity zones. CalFire maps designate State Responsibility Areas. Defensible space requirements apply per CA PRC Section 4291.
View full Pomona rules →Key Facts Comparison
| Fact | Altadena | Pomona |
|---|---|---|
| Authority | CalFire FHSZ Maps + LA County Title 32 | CalFire / LA County Fire |
| Construction Standard | CBC Chapter 7A in VHFHSZ | - |
| Disclosure | AB 38 required pre-2010 homes | - |
| Eaton Fire | January 2025 — Altadena devastated | - |
| Risk Areas | - | Northern foothills near Claremont |
| Defensible Space | - | 100 ft per PRC Section 4291 |
| Maps | - | CalFire FHSZ maps |
Highlighted rows indicate differences between cities.
Altadena FAQ
Is Altadena in a fire hazard zone?
Yes — most of Altadena north of Altadena Drive and into the foothills is in CalFire's Very High Fire Hazard Severity Zone, with additional High and Moderate areas mapped in 2024.
Pomona FAQ
How much defensible space do I need?
Typically 30 feet of lean/clean zone and 100 feet of reduced fuel zone around structures in Pomona wildfire areas.
Is my property in a wildfire zone?
Check with Pomona fire department or your state wildfire hazard map. Real estate disclosures must include wildfire zone status.
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