Sign Code Glossary: 60+ Terms Defined

A – B

Abandoned sign

A sign that no longer identifies an active business, product, or service. Most ordinances require removal of abandoned signs within 30–90 days. Landlords are typically responsible for removing signs left by former tenants.

Abatement

The city's authority to remove a sign and bill the owner for removal costs when an owner fails to comply with a removal order.

A-frame sign (sandwich board)

A freestanding, portable sign hinged at the top to form an "A" shape. Often regulated separately from permanent signs. Placement in public rights-of-way typically requires a sidewalk use permit.

Amortization period

A specified time period after which a non-conforming (grandfathered) sign must be brought into compliance or removed. Uncommon but used in some cities, particularly for billboard regulation.

Animated sign

A sign with moving parts, flashing lights, or changing images. Most sign codes prohibit or heavily restrict animation. LED signs that change messages may or may not be considered "animated" depending on dwell time rules.

Awning sign

Text, logo, or graphics on an awning fabric. Generally regulated as a sign and requires a permit. Area is usually calculated as the area of the printed portion, not the full awning.

Banner

A temporary sign made of flexible material (vinyl, fabric, mesh) typically hung on a building face, fence, or frame. Regulated separately from permanent signs in most ordinances. Time limits and annual permit caps apply.

Billboard

A large off-premise sign advertising goods, services, or messages not located on the property where the sign is installed. Regulated more heavily than on-premise signs. In many cities, new billboards are prohibited entirely.

Building frontage

The linear measurement of a building's face as seen from the street. Many sign codes calculate maximum allowed sign area as a ratio of building frontage (e.g., 1 square foot of sign per 1 linear foot of frontage).

C – D

Cabinet sign (box sign)

A sign with an aluminum or plastic enclosure (the cabinet) holding a translucent face panel, typically illuminated from inside. One of the most common commercial sign types. Area = face panel dimensions.

Canopy sign

A sign mounted on or attached to a canopy structure (permanent overhead covering). Treated similarly to awning signs in most ordinances.

Channel letters

Three-dimensional individual letter signs, typically illuminated. Each letter is a separate metal channel with a translucent face. Common on retail storefronts. Area is measured as the total bounding rectangle of the letter set, not individual letter areas.

Clearance (sign)

The vertical distance between the lowest point of a sign and the ground or pavement below. Most codes require minimum clearances over sidewalks (often 8 ft) and vehicle areas (often 14 ft).

Code enforcement

The municipal division responsible for investigating sign violations, issuing notices of violation, and pursuing enforcement action. Separate from the permit-issuing division in most cities.

Conforming sign

A sign that complies with all current applicable requirements of the sign ordinance. Opposite of non-conforming.

Copy area

The area of a sign actually containing text or graphics, as opposed to the total sign structure area. Some ordinances regulate copy area separately from total sign area.

Directional sign

A sign whose primary purpose is directing traffic or pedestrians (e.g., "entrance," "exit," "parking"). Often exempt from or subject to reduced permit requirements. Usually limited to small sizes (under 6 sq ft).

Double-faced sign

A sign with two display faces, typically back-to-back. Most ordinances count only the area of one face when calculating total sign area, provided the faces are parallel and the sign structure width is under a threshold (usually 12–18 inches).

E – G

Electronic message center (EMC)

A sign that displays changeable messages electronically, including LED matrix boards, digital billboards, and programmable text signs. Subject to strict regulation in most jurisdictions regarding brightness, dwell time, and animation.

Encroachment

A sign (or sign element) that extends into the public right-of-way. Requires a separate encroachment or right-of-way use permit in addition to a sign permit. Projecting signs and awnings frequently require encroachment permits.

Face change

Replacing the graphic panel or face of an existing sign cabinet without changing the cabinet structure or dimensions. Usually does not require a new sign permit, but verify with your city — illumination changes always trigger a new permit.

Fascia sign

See wall sign. A sign mounted flat against the exterior wall (fascia) of a building.

Feather flag (swooper flag)

A tall, narrow, flexible fabric sign on a pole. Regulated as a temporary sign in most jurisdictions. Commonly cited for permit violations because owners assume they are exempt.

Foot-candle

A unit of illuminance. Sign ordinances restricting sign brightness often specify maximum foot-candle levels at a measured distance from the sign. 0.3 fc above ambient at a specified distance is the most common limit for illuminated signs near residential areas.

Frontage

See building frontage.

Grandfathered sign (non-conforming sign)

A sign that was lawfully installed under prior regulations but does not conform to current requirements. Typically allowed to remain but cannot be expanded, relocated, or reconstructed in kind. See also: amortization period.

Ground sign

See monument sign. A freestanding sign whose base is at or near grade level.

H – M

Halo illumination (reverse channel letters)

Channel letters mounted away from the wall with LEDs projecting light behind the letters, creating a "halo" effect on the wall surface. Counted as an illuminated sign requiring both sign and electrical permits.

Historic district

A designated area with special regulations protecting architectural and historic character. Sign permits in historic districts require additional design review, typically by a Historic Preservation Commission. Review timelines are 3–8 weeks longer than standard permits.

Home occupation

A business operated from a residential property. Sign regulations for home occupations are significantly more restrictive than commercial zone rules, typically limiting signs to 1–4 sq ft, non-illuminated only.

Illuminated sign

Any sign that emits light, whether from an internal source, external fixtures, or electronic display. Requires both a sign permit and electrical permit in virtually all U.S. jurisdictions.

Marquee sign

A sign mounted on or forming part of a permanent canopy or marquee structure over a building entrance. Common on theaters and hotels. Regulated similarly to projecting signs and may require encroachment permits.

Monument sign

A freestanding sign supported by a solid base (masonry, brick, concrete, or similar) rather than a pole. Generally limited to 6–8 ft height in commercial zones, lower in residential/neighborhood commercial zones. The base is usually excluded from sign area calculations.

Multi-tenant sign

A freestanding sign designed to display the names of multiple businesses at a single location (e.g., a strip mall directory sign). Area and panel configurations are regulated by the sign ordinance.

N – P

Non-conforming sign

See grandfathered sign.

Notice of Violation (NOV)

A formal written notice from code enforcement documenting a specific sign code violation and specifying a correction deadline. The first step in the enforcement process. Failure to correct by the deadline triggers fines.

Off-premise sign

A sign advertising a business, product, or service not located on the same property. Billboards are off-premise signs. Most cities prohibit new off-premise signs in commercial areas; they are often banned entirely in residential zones.

On-premise sign

A sign identifying or advertising a business, product, or service available on the property where the sign is located. The standard category for business signs.

Overlay district

A special zoning district layered on top of the base zoning. Applies additional regulations in areas with special character or concerns (historic, scenic, mixed-use corridor, etc.). A property can be in both a base zone (C-2) and an overlay district (Historic Commercial Corridor), and must comply with both sets of rules.

Permitted sign

A sign for which a sign permit has been issued and which complies with all applicable requirements. Not to be confused with "allowed sign type" (a sign type that the ordinance permits in a zone).

Plan review

The process by which a municipal reviewer examines your permit application for code compliance before issuing approval. All sign permit applications go through plan review.

Pole sign (pylon sign)

A freestanding sign elevated on one or more poles, with visible structural support. Distinguished from monument signs by the exposed pole structure. Height limits typically range from 15–35 ft in commercial zones. Structural engineering drawings usually required.

Portable sign

Any sign not permanently affixed to a building or the ground. Includes A-frame signs, trailer signs, and vehicle signs. Often regulated separately from permanent signs.

Projecting sign (blade sign)

A sign mounted perpendicular to a building face, projecting outward over the sidewalk or adjacent area. Usually requires both a sign permit and an encroachment/right-of-way permit. Common on urban retail storefronts and restaurants.

Prohibited sign

A sign type that is not allowed in a zone under any circumstances — not merely requiring a permit, but flatly prohibited. New billboards are prohibited in most U.S. cities. Rotating signs and strobe-lit signs are commonly prohibited citywide.

R – S

Retroactive permit (permit for existing construction)

A permit applied for after a sign has already been installed. Most cities allow retroactive permits if the sign meets current code. The process is identical to a new permit application, except the sign already exists. Coming forward proactively is almost always treated favorably.

Right-of-way (ROW)

The strip of land owned by the government for public use, including streets, sidewalks, and utility corridors. Signs in the ROW require special permits. The ROW extends beyond the paved street edge — sometimes significantly into what appears to be private property.

Roof sign

A sign mounted on or above the roofline of a building. Prohibited in many jurisdictions. Where allowed, subject to strict height limits. Common historic downtown signs may be grandfathered.

Setback

The minimum required distance between a sign and a property line, right-of-way, or other feature. Freestanding signs must meet setback requirements from all applicable boundaries. Signs inside a building are not subject to setback rules.

Sign area

The total area of the sign face, typically measured as the area of the smallest rectangle (or other regular polygon) that encloses all sign elements. The structural support (pole, cabinet sides) is usually excluded. This is the key metric for permit fee calculations and maximum size compliance.

Sign code

The section of a city's municipal code that regulates signs. Also called the sign ordinance. Typically a chapter within the zoning code or land development code.

Sign district

A geographic area with specific sign regulations, often distinct from the underlying zoning district. Cities like Austin use sign districts as the primary regulatory framework for signs, separate from the base zoning.

Sign face

The display surface of a sign — the part that contains the message. For cabinet signs, the translucent panel. For channel letters, the colored acrylic face of each letter.

Sign ordinance

See sign code.

Sign program

A document negotiated between a property owner and the city that establishes approved sign specifications for a specific multi-tenant property. Tenants must comply with both the sign program and the city's sign code — whichever is more restrictive.

Stop-work order

A directive from code enforcement requiring all work to cease immediately. Issued when construction or installation begins without a required permit. A stop-work order on a sign installation requires the sign to be removed or work halted until a permit is obtained.

T – Z

Temporary sign

A sign intended for short-term display, not permanently affixed. Includes banners, feather flags, A-frames, and paper window signs. Regulated separately from permanent signs, with time limits and annual permit caps.

UL listing

Certification by Underwriters Laboratories that an illuminated sign product meets electrical safety standards. Many cities require UL-listed signs for electrical permit approval. Request UL documentation from your sign manufacturer before fabrication.

Variance

A formal exception to zoning rules, including sign rules, granted by the Zoning Board of Appeals. Requires demonstrating a property-specific hardship. Not a routine approval — variances are exceptions, not accommodations for preference.

Wall sign

A sign affixed flat against the exterior wall of a building, parallel to the wall surface. The most common commercial sign type. Area limits are typically calculated by zone as a percentage of wall area or ratio of frontage.

Window sign

Any sign applied to, placed in, or visible through a window. Coverage percentage thresholds (typically 25–30%) determine whether a permit is required for non-illuminated window signs. Illuminated window signs almost universally require permits.

Zoning district

A defined geographic area subject to specific land use regulations, including sign rules. Common commercial zones include C-1, C-2, B-1, B-2, CBD (Central Business District), and MU (Mixed-Use). Your zone determines your maximum sign area, allowed sign types, and illumination rules.

Zoning map

A city's official map showing the zoning classification of every parcel. Available online for most U.S. municipalities. Enter your address to find your zone before designing any sign.

Disclaimer: Definitions reflect common usage in U.S. municipal sign ordinances. Exact definitions vary by jurisdiction. Always consult your local sign ordinance for the precise definition used in your city's code.