ADU Rules: El Monte vs South San Gabriel
How do adu rules rules compare between El Monte, CA and South San Gabriel, CA?
El Monte and South San Gabriel have similar restriction levels.
El Monte, CA
Los Angeles County
El Monte Municipal Code Chapter 17.110 regulates Accessory Dwelling Units (ADUs) and Junior ADUs per California Government Code Sections 66314-66339. Detached ADUs may be up to 1,200 sq ft; attached up to 800 sq ft or 50% of the primary dwelling.
View full El Monte rules →South San Gabriel, CA
Los Angeles County
LA County's ADU Ordinance (amended October 2024) allows accessory dwelling units in all residential zones of unincorporated areas. Applications go through EPIC-LA and are reviewed by the Department of Regional Planning. Pre-approved plans are available.
View full South San Gabriel rules →Key Facts Comparison
| Fact | El Monte | South San Gabriel |
|---|---|---|
| Code Section | EMMC Ch. 17.110 | - |
| Detached Max | 1,200 sq ft | - |
| Attached Max | 800 sq ft or 50% of primary | - |
| Max Per Lot | 2 ADUs + 1 JADU | - |
| STR Use | Prohibited | - |
| Building & Safety | (626) 580-2037 | - |
| Max ADU Size | - | 1,200 sq ft |
| JADU Max | - | 500 sq ft |
| Side/Rear Setback | - | 4 feet |
| Max Height | - | 16 feet |
| Application | - | EPIC-LA portal |
Highlighted rows indicate differences between cities.
El Monte FAQ
How big can an ADU be in El Monte?
Detached ADUs may be up to 1,200 sq ft. Attached ADUs up to 800 sq ft or 50% of the primary dwelling. Up to 2 ADUs and 1 JADU per single-family lot.
Can I convert my El Monte garage to an ADU?
Yes. Garage conversions to ADUs are permitted under California state law and El Monte's Chapter 17.110. A building permit is required.
South San Gabriel FAQ
Can I build an ADU in unincorporated LA County?
Yes. One ADU and one JADU are allowed per lot in all residential zones. Detached ADUs can be up to 1,200 square feet. Apply through the EPIC-LA portal.
Do I need to live on-site to have an ADU in LA County?
No. California state law eliminates owner-occupancy requirements for ADUs. You can rent both the main home and the ADU.
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