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Outdoor Advertising

Billboard Extensions: Custom Cutouts, Top-Outs & 3D Add-Ons

Billboard extensions are how brands stop renting a billboard and start owning a moment. By breaking past the edges of the standard face — with cutouts, top-outs, 3D objects, or illuminated add-ons — extensions turn a static ad into the kind of creative drivers actually remember and post about. DASH TWO designs, fabricates, and installs custom extensions on campaigns in every major US market.
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What are Billboard Extensions?

Billboard extensions are physical elements that extend past the edges of a standard billboard face. They go by a handful of names — cutouts, top-outs, embellishments, extenders, add-ons — but the goal is always the same: extra surface area, unusual silhouettes, and a creative that breaks the rectangle. Common examples include a product bursting above the top edge, a logo extending off the side, or a 3D object mounted directly to the face.

Billboard Extensions

What are Billboard Extensions?

Extensions work best for campaigns that prioritize attention and recall over reach efficiency — movie launches, product debuts, automotive reveals, beverage brands, music releases, and fashion drops all use them to make a single high-traffic billboard hit harder. If the goal is impressions alone, extensions aren’t necessary. If the goal is people pulling out their phones at a stoplight, they earn every dollar.

What are Billboard Extensions Best For?

Extensions work best for campaigns that prioritize attention and recall over reach efficiency — movie launches, product debuts, automotive reveals, beverage brands, music releases, and fashion drops all use them to make a single high-traffic billboard hit harder. If the goal is impressions alone, extensions aren’t necessary. If the goal is people pulling out their phones at a stoplight, they earn every dollar.

Common Dimensions for Billboard Extensions

Most extensions are capped at roughly 20% of the display area, with a maximum height of around 4 feet above the standard face. Side and bottom extensions are possible in many markets but less common. Some cities — including Portland and a handful of Oregon municipalities — have stricter rules, and anything taller than 4 feet or unusually shaped needs a structural review and custom quote.

Average Cost of Billboard Extensions

Extensions are a one-time production and install fee on top of your billboard rental. Typical pricing runs $25 to $40 per square foot with a minimum of around $250, calculated on a rectangle drawn around the widest and tallest points of the artwork. A modest top-out generally runs $250 to $1,500. Large 3D builds or illuminated extensions can run $3,000 to $10,000 or more. The fee covers materials, fabrication, paint or vinyl, and install labor.
Large billboard reading 'OLIVIA RODRIGO' and 'FIRST WOMAN ON THE MOON' above a city street.
A custom crescent moon extension breaks past the right edge of this Olivia Rodrigo tour billboard in Los Angeles, promoting six sold-out nights at the Kia Forum and Intuit Dome. The 3D cutout turns a standard bulletin into unmistakable creative — a clear example of how extensions add scale, recall, and social shareability to an otherwise rectangular ad.
Falling In Reverse Ronald Grammy consideration billboard in Los Angeles with custom head cutout extension and laser-beam eyes above the bulletin face
Falling In Reverse's Ronald Grammy consideration billboard in Los Angeles, featuring a sculpted top-out extension — the screaming singer's head with energy beams shooting from the eyes extends well above the standard bulletin face. A textbook 3D extension that turns a flat For Your Consideration ad into an unmissable street moment.
Infographic of pedestrians crossing a street with a grid overlay; green highlights mark the extension measurement totaling 69 sq ft (grid = 1 sq ft).
14' × 48' bulletin in Los Angeles allows extensions up to 4 feet above the top edge, 2 feet on each side, and 1 foot below — measured in actual square footage of the extension shape, not the bounding box around it. The example shown totals 69 square feet, with the maximum allowable area reaching 296 square feet.

The Beatles' Abbey Road 50th anniversary billboard, installed in Los Angeles in September 2019. Four custom head cutouts extend above the standard 14' × 48' bulletin face, turning the iconic album cover into an unmistakable street-level moment — roughly 69 square feet of extension, well within LA's 4-foot top-limit.

Types of Billboard Extensions

Top-Outs

The most common extension — artwork that extends vertically above the top edge of the billboard. A product, mascot, or piece of typography bursts past the standard face for added height and impact.

Side and Bottom Extensions

Less common but allowed in many markets. Side extensions widen the footprint of the creative; bottom extensions are typically used for shaped graphics, hanging elements, or freestanding props beneath the face.

3D Extensions

Physical objects mounted to the face — paint rollers, coffee cups, vehicles, oversized products. 3D extensions deliver the strongest recall and the most social media coverage, and are the most production-intensive.

Drives Action

LED, neon, or backlit elements that draw attention after dark. Useful for nightlife, entertainment, and beverage campaigns where the bo

Cutouts

A flat element replaced with a contoured shape that follows the silhouette of the artwork — a stronger, sharper read than a rectangular face.

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Why DASH TWO for Billboard Extensions

DASH TWO has been booking outdoor campaigns since 2009 and we handle the full extension process end to end — creative direction, structural feasibility, permits and local approvals, fabrication, install, and removal. Because we negotiate billboard placement and creative production together, your campaign actually launches on the date we promise. No bouncing between a media vendor, a fabricator, and a print shop hoping the timing lines up.

Markets We Serve

Billboard extensions are available in every major US market we book in, including Los Angeles, New York, Miami, Chicago, Dallas, Atlanta, Nashville, Las Vegas, New Orleans, and Portland. Specific boards and municipalities have their own rules on extension size and direction — we confirm what’s possible before quoting so you never get surprised by a permit issue mid-production.

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Billboard Extension FAQs

How far in advance should I book a billboard extension?
Plan on 4 to 6 weeks from creative approval to install for standard extensions. 3D builds and illuminated extensions need 6 to 10 weeks. Permitting in restrictive markets can add another 2 to 4 weeks.

Most static bulletins can accept extensions. Digital billboards generally cannot — the LED face is the display. Posters and 8-sheets typically don’t support extensions either.

DASH TWO handles all local approvals and structural sign-offs as part of every extension quote.
For attention-driven campaigns, yes. Industry studies consistently show extended billboards deliver measurably higher recall and social media coverage than standard faces in the same locations.
Sometimes — flat painted or vinyl extensions can be re-installed on similar boards in other markets. 3D builds are usually board-specific. We can scope reusability during design.

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(310) 439-2356  ·  214 S. Locust St. #200, Inglewood CA 90301

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Digital and Outdoor Advertising Agency. Expertise in the science of digital and the art of the outdoor.

214 S. Locust St. #200
Inglewood, CA 90301

(310) 439-2356

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