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Hamilton County, TN Outdoor Lighting: Billboard Lighting (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Illumination type allowed
Stationary only
Prohibited
Flashing, intermittent, moving lights
Traffic-signal interference
Expressly prohibited
Enforcing office
Hamilton County Building Inspection

Summary

Off-premise billboards in unincorporated Hamilton County may use only stationary illumination. Zoning Regulations Art. V, § 203(J) bans flashing, intermittent or moving lights and forbids any billboard lighting that interferes with or obscures an official traffic signal or sign.

City-specific rules exist: Chattanooga has its own billboard lighting rules that differ from Hamilton County's county-level regulations. If you live in Chattanooga, check the city-specific page instead.

J. Illuminated Signs. Off-premise signs shall have stationary illumination only. No sign shall have flashing, intermittent or moving lights. No off-premise sign shall be so illuminated that it interferes with the effectiveness of or obscures an official traffic sign, device, or signal.

Full Breakdown

Article V, § 203(J) (Illuminated Signs) provides that off-premise signs shall have stationary illumination only, that no sign shall have flashing, intermittent or moving lights, and that no off-premise sign shall be so illuminated that it interferes with the effectiveness of or obscures an official traffic sign, device, or signal. This lighting rule works alongside § 203(I) (Motorist Safety), which separately bars illumination that varies in intensity or flashes and forbids signs that resemble a regulatory or warning traffic control device from the Manual on Uniform Traffic Control Devices, reinforcing that a billboard's lighting cannot compete with or mimic roadway signals.

Any new or remodeled sign structure, lighting included, must conform to adopted national, state and local engineering standards under § 203(C), with supporting documentation provided to the Director of Building Inspection. An off-premise sign permit under § 203(A) is required before a billboard or its lighting is installed, and off-premise signs are only permitted in the C-1, C-2, C-3, M-1, M-2, M-3 and M-4 districts to begin with. A billboard that was legally lit before these Regulations took effect but does not conform is treated as a legal nonconforming sign under § 203(K), which may continue but must be brought into compliance with current lighting standards if it is later removed and replaced.

Violations & Fines

Illuminating an off-premise sign with flashing, intermittent, or moving lights, or in a way that obscures or competes with a traffic signal or sign, violates § 203(J). Hamilton County Building Inspection can deny or revoke the sign permit, order the lighting corrected or removed, and cite the owner; appeals go to the Hamilton County Board of Zoning Appeals.

Frequently Asked Questions

Can a billboard in unincorporated Hamilton County have flashing or scrolling lights?
No. Section 203(J) requires off-premise signs to use stationary illumination only and expressly bans flashing, intermittent, or moving lights, regardless of the sign's size or district.
Can billboard lighting shine toward or wash out a nearby traffic signal?
No. Section 203(J) prohibits illuminating an off-premise sign in a way that interferes with the effectiveness of, or obscures, an official traffic sign, device, or signal, and § 203(I) separately bars signs that resemble regulatory traffic control devices.
Does an older billboard with nonconforming lighting have to be fixed immediately?
Not necessarily. Under § 203(K), a sign lawfully in place before the current rules took effect can continue as a legal nonconforming sign, but if it is later removed, its replacement must meet current lighting, size, and setback standards.

Sources & Official References

Other rules in Hamilton County

All Hamilton County rules

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