Garage Conversions: Altadena vs Long Beach
How do garage conversions rules compare between Altadena, CA and Long Beach, CA?
Long Beach has fewer restrictions than Altadena.
Altadena, CA
Los Angeles County
Garage conversions to ADUs in unincorporated Altadena are governed by LA County Code Title 22 §22.140.640 and California Government Code §65852.2. No replacement parking is required when an existing garage is converted, and existing setbacks are grandfathered. Properties in Very High Fire Hazard Severity Zones also trigger Chapter 7A wildland-urban interface standards.
View full Altadena rules →Long Beach, CA
Los Angeles County
Garage conversions to ADU or JADU allowed under CA state ADU law. Converted garages are exempt from setback requirements. No replacement parking required if within ½ mile of transit.
View full Long Beach rules →Key Facts Comparison
| Fact | Altadena | Long Beach |
|---|---|---|
| Governing Code | LA County Code §22.140.640 | - |
| Replacement Parking | Not required | Not required near transit |
| Existing Setbacks | Grandfathered | - |
| Fire-Zone Construction | Chapter 7A in WUI hillside | - |
| Permit Required | Yes — LA County building | - |
| State Law | - | CA Gov Code §65852.2 |
| Setbacks | - | Exempt — existing footprint governs |
| Pre-Approved Plans | - | Available from Long Beach Planning |
Highlighted rows indicate differences between cities.
Altadena FAQ
Do I need replacement parking if I convert my Altadena garage to an ADU?
No. Cal. Gov Code §65852.2 and LA County Code §22.140.640 prohibit the county from requiring replacement parking when a garage is converted to an ADU.
Are fire-resistant materials required for an Altadena garage conversion?
Yes, where the property is in a Very High Fire Hazard Severity Zone. Chapter 7A of the California Building Code requires ignition-resistant siding, eaves, vents, windows, and roofing in Altadena's hillside WUI areas.
Who handles the Altadena garage conversion permit?
LA County Public Works (Building & Safety) issues the building permit and LA County Regional Planning handles the ministerial ADU planning review under §22.140.640.
Long Beach FAQ
Can I convert my garage into living space in Long Beach?
Garage conversions to ADU or JADU allowed under CA state ADU law. Converted garages are exempt from setback requirements. No replacement parking required if within ½ mile of transit.
What permits do I need for a garage conversion in Long Beach?
State Law: CA Gov Code §65852.2. Setbacks: Exempt — existing footprint governs. Replacement Parking: Not required near transit. Pre-Approved Plans: Available from Long Beach Planning.
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