Light Trespass: Concord vs El Cerrito
How do light trespass rules compare between Concord, CA and El Cerrito, CA?
Concord and El Cerrito have similar restriction levels.
Concord, CA
Contra Costa County
Concord prohibits light trespass onto neighboring properties under CMC nuisance provisions and the Development Code's outdoor lighting standards. Exterior lighting must be shielded so zero foot-candles reach adjacent residential property lines.
View full Concord rules →El Cerrito, CA
Contra Costa County
Light trespass and glare onto adjacent properties in unincorporated Contra Costa County is prohibited under Ordinance Code Title 8 nuisance and zoning provisions. Commercial and multi-family projects must meet foot-candle limits at property lines through CEQA lighting review.
View full El Cerrito rules →Key Facts Comparison
| Fact | Concord | El Cerrito |
|---|---|---|
| - | - | |
| Property-line standard | - | ~0.5 fc onto residential parcels (typical) |
| Governing code | - | Ord. Code Title 8 + Ch. 14-6 nuisance |
| CEQA review | - | Photometric plan required for new development |
| Enforcement | - | DCD Code Enforcement |
| Security lighting | - | Allowed if shielded and not a nuisance |
Highlighted rows indicate differences between cities.
Concord FAQ
My neighbor's floodlight shines into my bedroom. What can I do?
Start with a friendly conversation. If unresolved, file a Code Enforcement complaint with the City of Concord. The fixture must be shielded or aimed to eliminate property-line spillover.
Can businesses leave lights on all night?
Parking-lot and sign lighting must comply with curfew requirements in residential-adjacent zones. Security lighting is permitted but must be shielded and downcast.
Are motion sensors required?
Not required, but Concord's Development Code encourages motion-activation and timer controls to minimize dusk-to-dawn light pollution.
El Cerrito FAQ
My neighbor's light shines into my window — is that illegal?
Unshielded lighting that creates a nuisance on adjacent property can be a code violation. CCC Code Enforcement can investigate and require the light to be shielded, redirected, or dimmed.
How bright can a commercial property light its parking lot?
Commercial lighting must be shielded and typically limited to around 0.5 foot-candles at the property line when adjacent to residential uses. Photometric plans are reviewed at the permit stage.
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