Light Trespass: Fontana vs Ontario
How do light trespass rules compare between Fontana, CA and Ontario, CA?
Fontana and Ontario 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 →Ontario, CA
San Bernardino County
Ontario treats light shining onto neighboring property as a public nuisance under OMC Chapter 30 and zoning Chapter 9, with a typical 0.5 footcandle limit at any residential property line and Code Enforcement response.
View full Ontario rules →Key Facts Comparison
| Fact | Fontana | Ontario |
|---|---|---|
| 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 | - |
| Line limit | - | About 0.5 horizontal fc |
| Legal basis | - | OMC Ch 9 / Ch 30 nuisance |
| Contact | - | Code Enforce (909) 395-2025 |
| Civil option | - | Civil Code 3479 |
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.
Ontario FAQ
How do I prove light trespass?
Document with night photos showing the source and spillover, measure with a smartphone light meter at the property line, then file a Code Enforcement complaint.
Can I sue my neighbor for bright lights?
Yes, California Civil Code 3479 allows a private nuisance action for persistent light trespass after other remedies fail.
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