2 rules for unincorporated Montgomery County, Pennsylvania.
Verified from official government sources
Montgomery County has no dark-sky ordinance. Outdoor-lighting and full-cutoff fixture requirements, where they exist, are adopted by individual boroughs and townships under their zoning power. Check your municipality's lighting standards.
53 P.S. §10603(b) (MPC Section 603(b))
Zoning ordinances... may permit, prohibit, regulate, restrict and determine:... Size, height, bulk, location, erection, construction, repair, maintenance, alteration, razing, removal and use of structures.
Montgomery County has no light-trespass rule. Whether stray light spilling onto a neighbor's property is limited depends on your borough or township lighting ordinance. Persistent glare may also be a private nuisance under PA common law.
53 P.S. §10603(b) (MPC Section 603(b))
Zoning ordinances... may permit, prohibit, regulate, restrict and determine:... Size, height, bulk, location, erection, construction, repair, maintenance, alteration, razing, removal and use of structures.
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