Light Trespass: Fontana vs Rancho Cucamonga
How do light trespass rules compare between Fontana, CA and Rancho Cucamonga, CA?
Fontana and Rancho Cucamonga have similar restriction levels.
Fontana, CA
San Bernardino County
Fontana treats light trespass as a zoning violation under FMC Title 17 and a nuisance under Civil Code 3479. Property-line levels facing residential parcels are capped; neighbors can pursue civil remedies.
View full Fontana rules →Rancho Cucamonga, CA
San Bernardino County
Rancho Cucamonga limits light trespass to 0.5 foot-candles at residential property lines under Development Code 17.58. Complaints can be filed with Planning for fixture retrofits or shielding.
View full Rancho Cucamonga rules →Key Facts Comparison
| Fact | Fontana | Rancho Cucamonga |
|---|---|---|
| City Limit | 0.5 fc at residential line | - |
| Nuisance Law | California Civil Code 3479 | - |
| Shielding | Required (commercial) | - |
| Remedy | Citation or injunction | - |
| Enforcement | Code Enforcement + court | - |
| Residential limit | - | 0.5 foot-candles |
| Commercial limit | - | 1.0 foot-candles |
| Measurement height | - | 5 feet above grade |
| Nuisance law | - | Civil Code 3479 |
| Contact | - | (909) 477-2750 |
Highlighted rows indicate differences between cities.
Fontana FAQ
How bright can a Fontana commercial site shine onto my home?
Typically no more than 0.5 foot-candles at the shared property line. Measure with an inexpensive light meter and contact Code Enforcement if exceeded.
Can I sue a neighbor over bright security lights?
Yes in extreme cases. Excessive light that substantially interferes with your use of your home is a private nuisance under Civil Code 3479, though courts usually require proof of significant harm.
Rancho Cucamonga FAQ
My neighbor's floodlight shines in my bedroom. What can I do?
File a complaint with Code Enforcement; they will measure spill at the property line and order shielding or aiming changes.
Does motion-activated lighting count as trespass?
Yes, if the activated level exceeds 0.5 foot-candles at the property line; motion triggering does not exempt the fixture.
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