Setback Rules: Altadena vs Santa Clarita
How do setback rules rules compare between Altadena, CA and Santa Clarita, CA?
Altadena and Santa Clarita have similar restriction levels.
Altadena, CA
Los Angeles County
Altadena R-1 setbacks: front = smallest existing front yard on the same block (min 20 ft); rear = 35 ft (lots ≥20,000 sf) or 25 ft (lots <20,000 sf); side = 10% of avg lot width, min 5 ft interior / 10 ft reverse corner.
View full Altadena rules →Santa Clarita, CA
Los Angeles County
Residential setbacks per SCMC 17.57. Zero lot line: 0 ft one side, 10 ft other. Garages 20 ft from ROW. ADUs require 4 ft side/rear setbacks.
View full Santa Clarita rules →Key Facts Comparison
| Fact | Altadena | Santa Clarita |
|---|---|---|
| Code Section | Altadena CSD 22.306.070.A.1 | - |
| Front (min) | 20 ft (or block average) | - |
| Rear ≥20k sf | 35 ft | - |
| Rear <20k sf | 25 ft | - |
| Side Interior | 10% avg lot width, min 5 ft | - |
| Within 15 ft of PL | Max 23 ft tall | - |
| Zero Lot Line | - | 0 ft + 10 ft opposite |
| Garage | - | 20 ft from ROW |
| ADU Setback | - | 4 ft side and rear |
| Multiple Frontages | - | Front setback on all streets |
Highlighted rows indicate differences between cities.
Altadena FAQ
What's the front yard setback in Altadena?
Match the smallest existing front yard on the same side of the block, but at least 20 feet — Altadena CSD 22.306.070.A.1.b.
Santa Clarita FAQ
How do I find my setback requirements?
Check Santa Clarita zoning map for your parcel’s zoning district, then consult the zoning code for that district’s setbacks.
Can I build closer than the setback?
Only with a variance approved by the zoning board or if your structure qualifies for an exception.
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