Wilmington, DE Sign Regulations: Window Signs (2026)
Key Facts
- Permanent window sign cap
- 10% of display window area
- Temporary sale-sign cap
- 25% of display window area
- Temporary sign max duration
- 30 days per 180-day period
- Applies in
- Market Street Mall design review district
- Approval required
- Design review commission
Summary
On the Market Street Mall, permanent interior window signs are capped at 10% of the display window area, and temporary sale signs at 25%.
Permanent signs affixed to or placed inside or attached to the inside surface of a display window...shall cover no more than ten percent of a display window area fronting a street. ... While a sale of goods or services is being conducted..., temporary "sale," "coming soon," "closing out sale," or similar signs may be displayed...provided the aggregate area of such signs does not exceed 25 percent of the display window area. Any such signs shall not be maintained for more than 30 days in any consecutive 180-day period.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 72).
Full Breakdown
Wilmington's design review district covering the Market Street Mall limits permanent signs mounted inside or visible through a display window to no more than ten percent of that window's area, and design review commission approval is required. Temporary 'sale,' 'coming soon,' or 'closing out sale' signs may cover up to 25 percent of the display window area, but only during an active sale or relocation, and never longer than 30 days in any 180-day period.
Violations & Fines
Exceeding the window coverage caps or running temporary sale signage past 30 days (or beyond the 180-day cycle) is enforced by the department of licenses and inspections under the city's sign permit program; signs installed without design review commission approval can be ordered removed.
Frequently Asked Questions
Does the 10% window sign limit apply citywide in Wilmington?
How long can a temporary sale sign stay in a Market Street Mall window?
Sources & Official References
Other rules in Wilmington
Compare Wilmington to another location·View the Delaware sign regulations overview
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