Wildfire Zones: Altadena vs Pasadena
How do wildfire zones rules compare between Altadena, CA and Pasadena, CA?
Altadena and Pasadena have similar restriction levels.
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 →Pasadena, CA
Los Angeles County
Pasadena has significant wildland-urban interface areas in its northern hillside neighborhoods near the Angeles National Forest. The 2025 Eaton Fire underscored wildfire risk. Properties in fire hazard zones must maintain defensible space and use fire-resistant construction materials.
View full Pasadena rules →Key Facts Comparison
| Fact | Altadena | Pasadena |
|---|---|---|
| Authority | CalFire FHSZ Maps + LA County Title 32 | - |
| Construction Standard | CBC Chapter 7A in VHFHSZ | - |
| Disclosure | AB 38 required pre-2010 homes | - |
| Eaton Fire | January 2025 — Altadena devastated | 2025 major wildfire event |
| WUI Areas | - | Northern hillside neighborhoods |
| Defensible Space | - | 100 ft required |
| Building Standards | - | Fire-resistant materials |
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.
Pasadena FAQ
Is north Pasadena in a fire zone?
Yes. Neighborhoods along the San Gabriel Mountain foothills are mapped VHFHSZ with strict building and clearance requirements.
What about debris flows?
Post-fire debris flows are a major risk. After the Station Fire and Eaton Fire, FEMA issued debris flow warnings for foothill areas.
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