Light Trespass: Altadena vs Lancaster
How do light trespass rules compare between Altadena, CA and Lancaster, CA?
Altadena and Lancaster 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 →Lancaster, CA
Los Angeles County
Lancaster prohibits outdoor lighting that causes unreasonable glare or illumination on neighboring properties. Light trespass complaints are handled through code enforcement.
View full Lancaster rules →Key Facts Comparison
| Fact | Altadena | Lancaster |
|---|---|---|
| Code Section | LA County 22.140.470 | - |
| Property Line Limit | 0.5 foot-candle (residential) | - |
| Fixture Type | Fully shielded / cutoff | - |
| Holiday Exemption | Nov 15 – Jan 15 | - |
| Property Line | - | 0.5 to 1.0 fc maximum |
| Security Lights | - | Must be aimed/shielded |
| Enforcement | - | Complaint-driven |
| Topic | - | Light Trespass |
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.
Lancaster FAQ
My neighbor's floodlight shines into my bedroom. What can I do?
File a light trespass complaint with Lancaster 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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