Relating to certain regulations adopted by governmental entities for the construction or alteration of residential or commercial buildings.

HB 5109 clarifies exemptions from certain building regulations for residential or commercial construction. It specifies that governmental entities cannot impose restrictions on outdoor lighting in Dark Sky Communities (certified or pursuing certification by the International Dark-Sky Association), historic preservation areas (like National Register sites or Recorded Texas Historic Landmarks), or military base zones. The bill also exempts buildings meeting windstorm insurance requirements or tied to state/federal funding programs. These exemptions directly affect municipalities, developers, and property owners in designated historic or environmentally focused areas. The law does not create new requirements but clarifies existing regulatory boundaries for specific building contexts.