Garage Conversions: Pasadena vs Topanga
How do garage conversions rules compare between Pasadena, CA and Topanga, CA?
Pasadena and Topanga have similar restriction levels.
Pasadena, CA
Los Angeles County
Garage conversions to ADUs in Pasadena are streamlined under California law. Converting existing garage space to living quarters does not require replacement parking. Building permits are required.
View full Pasadena 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 | Pasadena | Topanga |
|---|---|---|
| Permit | Building permit required | - |
| Replacement Parking | Not required under CA law | Not required |
| Building Code | Must meet habitable space standards | - |
| Setbacks | Existing nonconformities grandfathered | - |
| Governing Code | - | LA County Code §22.140.640 |
| Existing Setbacks | - | Grandfathered |
| Coastal Permit | - | Required in SMM LCP |
| Permit Required | - | Yes — LA County building |
Highlighted rows indicate differences between cities.
Pasadena FAQ
Can I convert my garage in Pasadena?
Yes. California law streamlines garage-to-ADU conversions. No replacement parking is required. A building permit is needed.
Do I need to provide replacement parking?
No. California law waives replacement parking requirements for garage-to-ADU conversions.
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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