Maine Billboards: Statewide Ban, On-Premises Rules, and Penalties

Maine billboard laws prohibit traditional off-premises billboards statewide. Title 23, Section 1908 of the Maine Revised Statutes bars anyone from erecting or maintaining a sign visible to the traveling public from a public way, except for narrow categories the statute carves out.¹ If you want outdoor signage for a Maine business, you have three legal paths: an on-premises sign at your own location, a sign that fits one of the categorical exemptions, or an Official Business Directional Sign installed through the Maine Department of Transportation.

How the Statewide Ban Works

Maine is one of only four states, along with Vermont, Hawaii, and Alaska, that prohibit billboards outright. The ban traces to 1977 legislation that took effect in 1978 and required most existing billboards to come down. The driving concern was the effect of scattered outdoor advertising on Maine’s scenic resources and its tourism economy.

The prohibition is broad. No sign visible to travelers from a public road is legal unless it fits a category spelled out in Chapter 21 of Title 23. Renting space on someone else’s property to advertise your business is not an option in Maine. What exists instead is a tightly regulated system of on-premises signs, small directional signs, and temporary signs, each with its own rules.

On-Premises Sign Rules

The biggest exception to the ban is for on-premises signs, which advertise a business or point of interest at the location where that activity happens. These are governed by Title 23, Section 1914.²

Size and Height

The maximum height for any on-premises sign is 25 feet above ground level. If the sign is attached to or part of a building, it cannot extend more than 10 feet above the roofline.²

Near interstates, the limits tighten. An on-premises sign located more than 50 feet from the principal building cannot exceed 20 feet in any dimension (length, width, or height) or 150 square feet in total area, including border and trim but not supports.²

Number and Placement

A single property is limited to 10 on-premises signs. If multiple businesses operate on one property, each business gets its own limit of 10. Every sign must sit within 1,000 feet of the principal building where the business operates.²

Approach Signs for Hidden Locations

If your building sits more than 1,000 feet from the nearest public road, or is not visible from it, Maine allows approach signs. A qualifying business may erect up to two, each no larger than 100 square feet in surface area. They must sit outside the public right-of-way but within 300 feet of the junction where the private road meets the public road.²

Digital and Changeable Sign Restrictions

Maine permits electronic on-premises signs, but the limits are strict. A changeable display may update no more than once every 20 minutes, and when it changes, the transition must happen as rapidly as the technology allows. Scrolling text, phasing effects, rolling transitions, and video animation are all prohibited. The maximum height for a changeable sign display is 25 feet above either the centerline of the nearest public road or the ground level next to the sign, whichever is lower.²

Municipalities can modify the 20-minute interval and the content format rules through local ordinance. Even so, no local ordinance can authorize flashing signs, continuous streaming information, or video animation. Those are banned statewide.²

Signs That Do Not Need a Permit

Title 23, Section 1913-A lists specific sign types that can be erected without a license or permit, as long as they comply with the rest of the chapter. These are narrow categories, not loopholes for commercial advertising.

Within the public right-of-way, the exempt categories include:³

Noncommercial signs erected by a governmental body, soil and water conservation district, or regional planning district.
Signs on registered and inspected motor vehicles or the rolling stock of common carriers, unless the commissioner determines they are circumventing the billboard ban.
Bus stop signs no larger than 260 square inches identifying stops or fare zone limits.
Hand-held signs not affixed to the ground or buildings.
Adopt-A-Highway signs installed under the program authorized by Section 1117.
Temporary signs for a maximum of 12 weeks per calendar year, split into two six-week windows (January through June and July through December). Each one cannot exceed 4 feet by 8 feet, must sit at least 30 feet from any other temporary sign carrying the same message, and must display the name, address, and placement date of the person or organization responsible.

Outside the public right-of-way, a sign may be erected without a permit as long as it does not exceed 50 square feet, subject to the on-premises rules in Section 1914.³

Every categorical sign, regardless of type, is banned from certain locations: traffic control devices, public utility poles, rotary traffic islands, trees in the public right-of-way, control-of-access areas, and medians less than 6 feet wide. Painting or drawing a sign on a rock or other natural feature is also prohibited.³

About that vehicle-sign category: if you park a truck carrying a large advertising sign in the same spot every day, the commissioner can find that you are circumventing the billboard ban. The test is whether the sign stays “continuously in the same location” or extends beyond the vehicle’s dimensions.³

Official Business Directional Signs

MDOT runs an Official Business Directional Sign (OBDS) program for businesses that need to guide travelers to their location. These small, standardized signs are the closest thing to off-premises advertising Maine allows, and they are strictly directional rather than promotional.

You apply through MDOT’s Right-of-Way Control section, and a municipal code enforcement officer or other designated local official must sign the application. Each sign costs $30, which covers both fabrication approval and installation licensing.⁴ The annual renewal fee is also capped at $30 per sign.⁵

Each business is limited to six directional signs within a 10-mile radius. MDOT controls the format. Signs come in two standard sizes (12 by 48 inches or 16 by 72 inches), must use blue retroreflective sheeting, and must be fabricated by a sign manufacturer to MDOT specifications. No vinyl is allowed, and the sign material itself must be at least half an inch thick and meet durability standards for Maine’s weather.⁴

Who Administers Sign Rules: State or Town

Sign administration is split between MDOT and municipalities, and the split matters when you need to ask a question or file an application.

In compact areas of urban compact municipalities, local government handles on-premises sign administration rather than MDOT. The exception is compact areas adjacent to the interstate, where MDOT keeps responsibility.² In practice, in many of Maine’s more populated towns and cities, your local code enforcement office is the first stop, not Augusta.

Towns may also adopt their own ordinances governing changeable sign intervals and content, and many layer additional restrictions on sign placement through local zoning. Some communities ban signs in historic districts or residential areas entirely. Local rules can only be stricter than the state baseline, never more permissive on flashing or animation. Checking your town’s ordinances before investing in signage is worth the time.

Penalties for Illegal Signs

Putting up or maintaining an illegal sign in Maine carries a fine of up to $100, plus the cost of removing the sign. Each day the sign remains counts as a separate offense, so daily fines accumulate. A sign left up for a month could generate $3,000 in fines before removal costs.⁶

Beyond fines, the MDOT commissioner can seek a court injunction to compel compliance, meaning a judge can order you to take the sign down and hold you in contempt if you refuse. This enforcement power applies to violations of the statute and any rules the commissioner has adopted under it.⁶

1
Maine State Legislature. Maine Code Title 23 1908 – Regulation of Outdoor Advertising
2
Maine State Legislature. Maine Code Title 23 1914 – On-Premises Signs
3
Maine State Legislature. Maine Code Title 23 1913-A – Categorical Signs
4
Maine.gov. Business and Directional Sign Programs
5
Maine State Legislature. Maine Code Title 23 1919 – Fees
6
Maine State Legislature. Maine Code Title 23 1920 – Penalty