Garage Conversions: Topanga vs West Covina
How do garage conversions rules compare between Topanga, CA and West Covina, CA?
Topanga and West Covina have similar restriction levels.
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 →West Covina, CA
Los Angeles County
West Covina allows garage conversions to Accessory Dwelling Units (ADUs) or Junior ADUs (JADUs) under state law and the City's Development Code. Converted garages do not require replacement parking. Each lot may have one ADU and one JADU. ADUs cannot have separate addresses or utilities.
View full West Covina rules →Key Facts Comparison
| Fact | Topanga | West Covina |
|---|---|---|
| Governing Code | LA County Code §22.140.640 | - |
| Replacement Parking | Not required | Not required |
| Existing Setbacks | Grandfathered | - |
| Coastal Permit | Required in SMM LCP | - |
| Permit Required | Yes — LA County building | - |
| Max Per Lot | - | 1 ADU + 1 JADU |
| Driveway Width | - | Max 20 ft if converted |
| Code | - | WCMC Ch. 26 Div. 11 |
Highlighted rows indicate differences between cities.
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.
West Covina FAQ
Can I convert my garage to a living space in West Covina?
Yes. File a Second Unit Review (SUR) Application with the Planning Division. The conversion must match the primary unit's exterior and have a separate entrance. Replacement parking is not required.
Can my ADU have its own address and utilities?
No. In West Covina, ADUs and JADUs may not have separate addresses or utilities from the main residence.
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