New Castle County, DE Sign Regulations: Window Signs (2026)
Key Facts
- Countywide default
- Window signs excluded from 'sign' definition, no permit
- Governing section
- Sec. 40.06.020, Sign definition, Article 6
- Byway corridor rule
- Window signs banned within 660 ft of scenic byways
- Historic overlay cap
- 20% max window coverage for advertising
- Enforcing agency
- New Castle County Department of Land Use
- Default penalty
- $500 fine per day, strict liability
Summary
Window signs are not "signs" under New Castle County's Unified Development Code: Section 40.06.020 excludes interior displays visible through glass from the definition, so no permit, area limit, or setback applies to them in ordinary zoning districts. Two overlays claw the exemption back: designated scenic byway corridors ban window signs outright, and Historic overlay districts cap window advertising at 20 percent of the glass.
Sign means and includes any writing, figure, representation, emblem, flag, three-dimensional figure or model, device, letter, word, street clock and temperature announcement, and shall include any announcement, declaration, demonstration, display, illustration, name, identification, description or insignia used to advertise or promote the interest of any person, group or business when such is viewed by the general public. This definition shall not include interior sign displays (i.e., signs in windows) whether or not visible by the general public. This definition shall include any sign placed upon a vehicle or trailer when the location of the vehicle or trailer is reasonably construed as being placed for the display of advertising matter.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 5).
Full Breakdown
1 imposes on signs over 28 square feet. A retailer in a standard commercial or residential district can post window signage of any size without a zoning permit. That exemption does not travel to every district, though. A lists "Window signs" among the flatly prohibited types, alongside EVMS, marquee, projecting and roof signs, so a business on a byway corridor cannot rely on the countywide exemption at all. 6 reclassifies window advertising as a wall sign for coverage purposes and limits it to 20 percent of the window's area, while still allowing interior hung panels.
Both overrides sit inside the same Chapter 40 enforcement scheme, so the Department processes violations of either rule the same way it processes any other Unified Development Code infraction.
Violations & Fines
Chapter 40's general enforcement provision, Section 40.31.920.C, makes violating any Article of the Unified Development Code, including the byway and Historic overlay sign limits, a strict-liability offense where intent does not matter. Where no specific penalty is otherwise provided, the Code Enforcement Officer or the County Attorney can pursue a criminal fine of $500, and each day a violation continues counts as a separate offense. The Department can also issue a notice requiring correction before further action is taken.
Frequently Asked Questions
Does New Castle County limit how much of my storefront window I can cover with signs?
Do I need a sign permit for window decals or posters?
What happens if a business ignores the byway or Historic overlay window sign limits?
Sources & Official References
Other rules in New Castle County
Compare New Castle County to another location·View the Delaware sign regulations overview
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