Garage Conversions: Glendale vs Topanga
How do garage conversions rules compare between Glendale, CA and Topanga, CA?
Glendale has fewer restrictions than Topanga.
Glendale, CA
Los Angeles County
Glendale allows garage-to-ADU and garage-to-JADU conversions under GMC §30.34.080, consistent with California Government Code §65852.2. No replacement parking is required when an existing garage is converted to an ADU, and the existing setbacks are preserved for the conversion footprint.
View full Glendale rules →Topanga, CA
Los Angeles County
Garage conversions to ADUs in unincorporated Topanga are governed by LA County Code Title 22 §22.140.640 and California Government Code §65852.2. No replacement parking is required when a garage is converted to an ADU, and existing setbacks are preserved. A Coastal Development Permit applies in the Santa Monica Mountains Local Coastal Program area.
View full Topanga rules →Key Facts Comparison
| Fact | Glendale | Topanga |
|---|---|---|
| Code Section | GMC §30.34.080; Cal. Gov Code §65852.2 | - |
| Replacement Parking | Not required | Not required |
| Existing Setbacks | Preserved for conversion | Grandfathered |
| Multifamily Conversion | Up to 25% of existing units | - |
| Permit Required | Yes — building permit | Yes — LA County building |
| Governing Code | - | LA County Code §22.140.640 |
| Coastal Permit | - | Required in SMM LCP |
Highlighted rows indicate differences between cities.
Glendale FAQ
Do I need to replace my parking if I convert my Glendale garage to an ADU?
No. Cal. Gov Code §65852.2 and GMC §30.34.080 prohibit Glendale from requiring replacement parking when an existing garage is converted to an ADU.
Can my Glendale multifamily building add conversion ADUs?
Yes. Under GMC §30.34.080, conversion ADUs may be created in non-livable space within an existing multifamily building up to 25% of the existing unit count.
Do I still need a permit to convert a Glendale garage?
Yes. A building permit from Glendale Community Development is required for any change of use from garage to habitable space, though the planning review is ministerial under §30.34.080.
Topanga FAQ
Do I need to add parking if I convert my Topanga 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.
Do I still need a Coastal Development Permit for a garage conversion?
Yes, typically. Most Topanga properties fall within the certified Santa Monica Mountains LCP, so a CDP is required in addition to the building permit unless a categorical exclusion applies.
Who issues the permit for a Topanga garage conversion?
LA County Public Works (Building & Safety) issues the building permit; LA County Regional Planning processes the ministerial ADU review and any Coastal Development Permit.
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