Garage Conversions: Altadena vs Torrance
How do garage conversions rules compare between Altadena, CA and Torrance, CA?
Altadena and Torrance have similar restriction levels.
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 →Torrance, CA
Los Angeles County
Torrance allows garage conversions to ADUs under TMC §92.2.10. Replaced parking is not required. JADUs up to 500 sq ft can be built within attached garages. Ministerial approval within 60 days.
View full Torrance rules →Key Facts Comparison
| Fact | Altadena | Torrance |
|---|---|---|
| Governing Code | LA County Code §22.140.640 | - |
| Replacement Parking | Not required | Not required for conversions |
| Existing Setbacks | Grandfathered | - |
| Fire-Zone Construction | Chapter 7A in WUI hillside | - |
| Permit Required | Yes — LA County building | - |
| Code Section | - | TMC §92.2.10 |
| JADU in Garage | - | Up to 500 sq ft |
| Setback Exemption | - | For existing structure conversions |
| Review Period | - | 60 days max |
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.
Torrance FAQ
Can I convert my garage into living space in Torrance?
Torrance allows garage conversions to ADUs under TMC §92.2.10. Replaced parking is not required. JADUs up to 500 sq ft can be built within attached garages. Ministerial approval within 60 days.
What permits do I need for a garage conversion in Torrance?
Code Section: TMC §92.2.10. Replacement Parking: Not required for conversions. JADU in Garage: Up to 500 sq ft. Setback Exemption: For existing structure conversions.
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