Permit Requirements: Altadena vs Norwalk
How do permit requirements rules compare between Altadena, CA and Norwalk, CA?
Altadena and Norwalk have similar restriction levels.
Altadena, CA
Los Angeles County
Fences under 6 ft do not require a building permit in unincorporated LA County. Fences over 6 ft require permits from Building & Safety. Department of Regional Planning approval may be needed depending on fence location (front yard, corner lot). Block walls over 6 ft always require permits.
View full Altadena rules →Norwalk, CA
Los Angeles County
Norwalk may require permits for fences over a certain height (typically 6 feet). Standard residential fences often exempt from permits.
View full Norwalk rules →Key Facts Comparison
| Fact | Altadena | Norwalk |
|---|---|---|
| Under 6 ft | No building permit needed | Usually no permit |
| Over 6 ft | Permit required | Permit required |
| Front Yard | May need DRP approval | - |
| Corner Lot | Special visibility requirements | - |
| Masonry | - | Permit likely required |
| Pool Fence | - | Must meet safety code |
Highlighted rows indicate differences between cities.
Altadena FAQ
Do I need a permit for a fence in LA County?
No permit is needed for fences under 6 feet. Fences over 6 feet require a building permit from LA County Building & Safety. Front yard fences are limited to 42 inches in most residential zones.
How tall can my front yard fence be?
42 inches (3.5 feet) in most residential zones under Title 22. This ensures visibility for vehicles and pedestrians. Taller fences may be allowed on corner lots with specific setback compliance.
What about retaining walls?
Retaining walls over 4 feet from footing to top require a building permit and engineered plans. Multiple tiered walls designed to circumvent this limit are treated as a single wall for permit purposes.
Norwalk FAQ
Do I need a permit for a fence?
Standard wood/vinyl fences under 6 feet typically don’t require permits. Taller, masonry, or pool fences usually do.
What about HOA approval?
HOA approval is separate from city permits. You may need both.
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