Beaufort County, SC Outdoor Lighting: Light Trespass & Shielding (2026)

Section 5.7.40.A of the Community Development Code's exterior lighting standards includes a numeric spillover limit protecting neighboring houses. Subsection A.7 states: "All exterior lighting shall maintain maximum illumination values of one-half (0.5) footcandles or less at lot lines adjacent to existing single-family dwellings." That cap applies regardless of the lighting's purpose, whether parking lot lighting, building-mounted security lighting, or landscape lighting, and it is measured at the property line itself, not on the lit site.

The rule sits inside a broader anti-glare framework. Subsection A.1 requires architectural and decorative lighting visible from the corridor to come from "a concealed light source with low-level fixtures," and A.2 requires fixture design to "minimize the amount of ambient lighting perceptible from adjacent properties." A.3 bars any lighting that would "impair the vision of motorists." Table 5.7.40.A separately sets minimum, average, and maximum footcandle levels by land use, for example landscape and decorative lighting is capped at 5.0 footcandles maximum on-site and commercial parking at 10.0 footcandles maximum on-site, but the 0.5-footcandle figure in A.7 is the specific number controlling at the boundary with a single-family lot.

Because Section 5.7.30 exempts single-family, single-family-attached, and duplex homes from the exterior lighting standards generally, A.7's boundary limit functions mainly as a shield for existing houses against light from adjoining commercial, multifamily, or institutional development, not a cap that residential lots owe each other.