Light Trespass: Concord vs San Ramon
How do light trespass rules compare between Concord, CA and San Ramon, CA?
Concord and San Ramon 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 →San Ramon, CA
Contra Costa County
San Ramon Development Code limits light glare and spillover from private lighting onto neighboring properties and public rights-of-way. Typical standards require illumination at property lines not to exceed 0.5–1.0 foot-candles for residential-adjacent properties, with full-cutoff fixtures required to prevent direct view of light sources from off-site. Violations are handled through code enforcement and may also give rise to civil nuisance claims. Security lighting is allowed but must be shielded and ideally motion-activated.
View full San Ramon rules →Key Facts Comparison
| Fact | Concord | San Ramon |
|---|---|---|
| - | - |
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.
San Ramon FAQ
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