Wildfire Zones: Altadena vs Lancaster
How do wildfire zones rules compare between Altadena, CA and Lancaster, CA?
Lancaster 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 →Lancaster, CA
Los Angeles County
Lancaster may have wildfire hazard zones requiring defensible space around structures, fire-resistant building materials, and vegetation management.
View full Lancaster rules →Key Facts Comparison
| Fact | Altadena | Lancaster |
|---|---|---|
| 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 | - |
| Zone 1 | - | 0 to 30 feet clearance |
| Zone 2 | - | 30 to 100 feet reduced fuel |
| Materials | - | Fire-resistant may be required |
| Insurance | - | May require compliance |
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.
Lancaster 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 Lancaster wildfire areas.
Is my property in a wildfire zone?
Check with Lancaster fire department or your state wildfire hazard map. Real estate disclosures must include wildfire zone status.
Compare other topics
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