Waukesha County has no countywide dark-sky ordinance. Its town zoning code controls glare only for commercial/parking lighting, requiring cut-off fixtures that don't throw light onto neighbors. Residential dark-sky standards, where they exist, are set by individual cities and villages.
The County Basic Zoning Ordinance does not adopt an International Dark-Sky-style ordinance for residential yards. Its lighting controls appear in the parking standards (Sec. 3.13): lights in parking areas must be hooded or beamed so as not to create undesirable glare or illumination of adjacent residential properties, must use cut-off type fixtures, and are held to footcandle caps at property lines with poles limited to 25 ft. Site-plan review for commercial development also requires a photometric/lighting plan. For a home, the county sets no maximum brightness or fixture-shielding mandate; any residential dark-sky or nuisance-lighting rule comes from your municipality or general nuisance law.
Commercial lighting that violates the parking-lot glare or footcandle standards can be cited in site-plan enforcement; residential glare is typically handled as a municipal nuisance.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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