Outdoor Lighting in McHenry County, IL (2026)
2 rules for unincorporated McHenry County, Illinois.
Verified from official government sources
Dark Sky Rules
Unincorporated McHenry County requires every new permanent commercial or industrial light fixture to be fully shielded so its bulb cannot be seen through a neighboring home's window. UDO Section 16.60.020(A) sets the design standard; temporary or purely decorative lighting, like holiday displays, is exempt if tied to a temporary use permit.
McHenry County Outdoor Lighting Shielding Rule
Some RestrictionsMcHenry County UDO § 16.60.020(A), (C)
A. New installations of permanent lighting for a commercial or industrial use must use a fully shielded lighting fixture positioned so as to prevent direct view of the bulb or polished reflective surface through a window of a residence. ... C. Installations of non-permanent lighting is allowed without shielding so long as it is done in conjunction with a temporary use permit or for primari...
Light Trespass & Shielding
In unincorporated McHenry County, new permanent residential lighting must be positioned so the bulb or its reflective surface cannot be seen directly through a neighbor's window under UDO Section 16.60.020(B). Traditional period-style fixtures are excepted, and a separate subsection governs commercial and industrial installs with full shielding instead.
McHenry County Residential Light Trespass Rule
Some RestrictionsMcHenry County UDO § 16.60.020(B)
B. New installations of permanent lighting for a residential use must be positioned so as to prevent direct view of the bulb or polished reflective surface through a window of a residence, with the exception of ‘period-style” fixtures.
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