Garage Conversions: Castaic vs Lakewood
How do garage conversions rules compare between Castaic, CA and Lakewood, CA?
Castaic and Lakewood have similar restriction levels.
Castaic, CA
Los Angeles County
Garage conversions to ADUs in unincorporated Castaic 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 the existing garage's setbacks are grandfathered. Properties in Very High Fire Hazard Severity Zones also trigger Chapter 7A wildland-urban interface standards.
View full Castaic rules →Lakewood, CA
Los Angeles County
California law facilitates garage conversions to ADUs/JADUs. Lakewood cannot require replacement parking for converted garages in many cases.
View full Lakewood rules →Key Facts Comparison
| Fact | Castaic | Lakewood |
|---|---|---|
| Governing Code | LA County Code §22.140.640 | - |
| Replacement Parking | Not required | - |
| Existing Setbacks | Grandfathered | - |
| Fire-Zone Construction | Chapter 7A in WUI areas | - |
| Permit Required | Yes — LA County building | - |
| Parking | - | No replacement required (near transit) |
| JADU | - | Up to 500 sq ft |
| State Law | - | Gov. Code §65852.2 |
| Fire Sep. | - | May need upgrades |
Highlighted rows indicate differences between cities.
Castaic FAQ
Do I need to add parking if I convert my Castaic 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 a Castaic 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 WUI areas.
Who issues a Castaic garage conversion permit?
LA County Public Works (Building & Safety) issues the building permit; LA County Regional Planning handles the ministerial ADU planning review under §22.140.640.
Lakewood FAQ
Can I convert my garage to living space?
Yes. California law facilitates garage-to-ADU/JADU conversions. Lakewood must allow it and often cannot require replacement parking.
Do I need to provide parking?
Generally no, especially within 1/2 mile of public transit.
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