Garage Conversions: Burbank vs Topanga
How do garage conversions rules compare between Burbank, CA and Topanga, CA?
Burbank has fewer restrictions than Topanga.
Burbank, CA
Los Angeles County
Burbank allows conversion of existing garages and accessory structures to ADUs or JADUs under BMC §10-1-620.3, consistent with California Government Code §65852.2. No replacement parking is required when an existing garage is converted to an ADU, and the existing structure's setbacks are grandfathered for the conversion footprint.
View full Burbank 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 | Burbank | Topanga |
|---|---|---|
| Code Section | BMC §10-1-620.3; Cal. Gov Code §65852.2 | - |
| Replacement Parking | Not required by state law | Not required |
| Existing Setbacks | Grandfathered for conversion | Grandfathered |
| ADU Over Garage | 20 ft to plate / 23 ft to roof | - |
| 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.
Burbank FAQ
If I convert my Burbank garage to an ADU, do I need a replacement parking space?
No. Cal. Gov Code §65852.2 and BMC §10-1-620.3 prohibit Burbank from requiring replacement parking when an existing garage is converted to an ADU or JADU.
Can I build a new ADU on top of my Burbank garage?
Yes. Under BMC §10-1-620.3, a detached ADU built on top of a garage or other accessory structure may be up to 20 feet to top of plate and 23 feet to top of roof or architectural feature.
Do I still need a permit for a Burbank garage-to-ADU conversion?
Yes. Burbank Community Development requires a building permit for any change of use from garage to habitable space; the planning review remains ministerial under §10-1-620.7.
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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