Iredell County, NC Sign Regulations: Digital Billboards (2026)

1, even though both require a zoning permit and are limited to the H-B, G-B, M-1, and M-2 zoning districts. The size cap is a flat 380 square feet per sign face, versus the tiered 300-to-600-square-foot range for static boards, and only one message may display at a time; a rotating message has to hold for a minimum of ten seconds and complete its change sequence in two seconds or less, which rules out fast-cycling or animated content. Spacing rules stack up quickly: 400 feet from any residential zoning or use, 2,000 feet from another digital billboard on the same or opposite side of the street, 1,000 feet from a static billboard, and 500 feet from any interstate access or exit ramp.

Brightness is metered, not just capped by eye: an automatic dimmer and photo cell must hold illumination to 7,500 nits in daylight and 500 nits between dusk and dawn, verified in a test the Zoning Administrator witnesses before a certificate of occupancy issues. No moving, rotating, blinking, or video content is allowed, construction has to be a single freestanding uni-pole, and NCDOT must approve the sign in writing before the zoning permit is issued. Geography closes the loop: a digital billboard cannot be located anywhere inside a Municipal Growth Overlay, and it may only go up along limited-access interstate and limited-access US primary highways as defined in the county's Comprehensive Transportation Plan, which rules out digital boards on ordinary county roads even inside an eligible zoning district.