Security Light Shielding: Arlington Heights vs Chicago

Does a homeowner need a permit for security lights?

Single-family residential security lights generally do not require a permit in unincorporated Cook County, but they must not trespass onto neighboring property. Commercial and multifamily lighting plans need site plan review under Ch. 102 zoning.

What counts as light trespass?

Light from your fixtures crossing the property line and falling on a neighbor's house or yard at more than about 0.1 foot-candles is light trespass. Full-cutoff shields, downward aiming, and lower wattage usually solve the problem.

Can my neighbor force me to shield my floodlight?

Yes if it trespasses or creates a nuisance. The neighbor can complain to county code enforcement under Ch. 38 nuisance provisions. Inspectors can order shielding, redirection, or removal; failure to comply triggers fines and administrative hearings.

Are motion-sensor security lights exempt?

Single-family residential motion sensors are largely exempt from energy code wattage rules but must still avoid trespassing onto neighbor windows under nuisance and zoning standards in MCC 17-11.

What is Lights Out Chicago?

A voluntary program asking buildings to dim or extinguish decorative facade and rooftop lighting during peak bird migration in spring and fall. Required for some Bird-Friendly Building permits under MCC 17-4-1614.