Light spilling from a neighbor's fixture onto your property is a city zoning matter, not a county one. Carmel's UDO bars any lighting from causing illumination at or beyond a lot line above 0.1 foot-candle, giving code enforcement a measurable standard.
Light trespass, meaning unwanted light crossing onto your property, is regulated by each Hamilton County city under IC 36-7-4, not by the county. Carmel's Unified Development Ordinance (Section 5.02) sets a measurable residential standard: no lighting shall cause illumination at or beyond any lot line in excess of 0.1 foot-candle of light. Non-residential accessory lighting is capped at 0.1 foot-candle beyond a residential lot line and 0.3 foot-candle beyond a non-residential line. These limits give city code enforcement an objective basis to act. Fishers, Westfield, and Noblesville have similar spillover caps in their zoning codes. Where no numeric standard reaches a situation, a homeowner's fallback for severe, persistent glare is a private-nuisance claim under Indiana common law. Start with the
Where a city lighting standard applies, enforcement is by city code enforcement, usually via a notice to reshield or reaim the fixture. Absent a local standard, the remedy is a private-nuisance action in court. The county has no role.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Hamilton County's light trespass rules stack up against other locations.
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