Permit Requirements: Altadena vs Santa Monica
How do permit requirements rules compare between Altadena, CA and Santa Monica, CA?
Altadena and Santa Monica 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 →Santa Monica, CA
Los Angeles County
Fence permits in Santa Monica are regulated under the zoning code. Front yard fences, walls, and hedges are limited to 42 inches (3.5 ft). Height modifications up to 4 ft above limits available through administrative review; greater increases require a Director hearing.
View full Santa Monica rules →Key Facts Comparison
| Fact | Altadena | Santa Monica |
|---|---|---|
| Under 6 ft | No building permit needed | - |
| Over 6 ft | Permit required | - |
| Front Yard | May need DRP approval | - |
| Corner Lot | Special visibility requirements | - |
| Front Yard Max | - | 42 inches (3.5 ft) |
| Modification | - | Up to 4 ft above limit (admin) |
| Greater Increase | - | Director hearing required |
| Code | - | SMMC §9.21.180 |
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.
Santa Monica FAQ
Do I need a permit to build a fence in Santa Monica?
Fence permits in Santa Monica are regulated under the zoning code. Front yard fences, walls, and hedges are limited to 42 inches (3.5 ft). Height modifications up to 4 ft above limits available through administrative review; greater increases require a Director hearing.
How much does a fence permit cost in Santa Monica?
Front Yard Max: 42 inches (3.5 ft). Modification: Up to 4 ft above limit (admin). Greater Increase: Director hearing required. Code: SMMC §9.21.180.
Compare other topics
See how Altadena and Santa Monica compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool