Light Trespass: Altadena vs Santa Clarita
How do light trespass rules compare between Altadena, CA and Santa Clarita, CA?
Altadena and Santa Clarita have similar restriction levels.
Altadena, CA
Los Angeles County
LA County Code Section 22.140.470 (Outdoor Lighting) requires all outdoor lighting to be shielded so that direct illumination does not cross the property line, with hard caps in residential zones.
View full Altadena rules →Santa Clarita, CA
Los Angeles County
All lighting must be shielded and may not spill over to adjacent properties per SCMC 17.51.050. Mechanical/electrical devices must not disturb neighbors.
View full Santa Clarita rules →Key Facts Comparison
| Fact | Altadena | Santa Clarita |
|---|---|---|
| Code Section | LA County 22.140.470 | SCMC 17.51.050 |
| Property Line Limit | 0.5 foot-candle (residential) | - |
| Fixture Type | Fully shielded / cutoff | - |
| Holiday Exemption | Nov 15 – Jan 15 | - |
| Spillover | - | Prohibited |
| Shielding | - | Required for all new lighting |
| Integration | - | Within building architecture |
Highlighted rows indicate differences between cities.
Altadena FAQ
Can my neighbor's floodlight shine into my Altadena yard?
No — LA County Code 22.140.470 caps property-line illumination at 0.5 foot-candle and requires shielded fixtures. File a complaint with Code Enforcement.
Santa Clarita FAQ
My neighbor's floodlight shines into my bedroom. What can I do?
File a light trespass complaint with Santa Clarita code enforcement. Most codes require lights to be shielded and aimed so they don't illuminate neighboring properties.
Are holiday lights exempt from light trespass rules?
Temporary holiday displays are often exempt during the holiday season, typically November through January. However, they still cannot create a safety hazard.
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