Outdoor Lighting in Wilmington, DE (2026)
3 verified outdoor lighting rules for Wilmington, Delaware, sourced directly from the municipal code and official government pages.
Verified from official government sources
Dark Sky Rules
City zoning law requires all parking lot lighting to be arranged so direct rays stay confined to the lot surface itself, preventing glare and light spillover onto neighboring properties or streets.
Wilmington Parking Lot Lighting Must Stay On-Lot
Some RestrictionsWilmington City Code § 48-511(5)
Any lighting used to illuminate it or any accessory structure shall be so arranged that all direct rays of light are confined to the surface of the parking lot;(6)No building permit shall be issued for a parking lot until the application for the same has been submitted to the department of public works for review and report and such report is received by the department of licenses and inspectio...
Light Trespass & Shielding
Self-storage and mini-warehouse facilities approved in Wilmington's C-2 commercial districts must aim all outdoor lighting onto the site and away from neighboring property, per zoning board conditional-use standards.
Wilmington Mini-Warehouse Security Light Shielding Rule
Some RestrictionsWilmington City Code § 48-193(d)(2)(l)
All lights shall be shielded to direct light onto the uses established and away from adjacent property, but may be of sufficient intensity to discourage vandalism and theft.
Billboard Lighting
Wilmington's sign code requires gooseneck reflectors and lights on ground signs, a category that by definition includes billboards, to be aimed so illumination stays on the sign face, not the street or neighbors.
Wilmington Billboard Sign Lighting Limits
Some RestrictionsWilmington City Code § 41-10
Gooseneck reflectors and lights shall be permitted on ground signs, roof signs, projecting signs and wall signs; provided, however, that the reflectors are so constructed and arranged to concentrate the illumination upon the area of the sign so as to prevent glare upon the street or on adjacent property.
Looking for New Castle County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Wilmington city rules.
Outdoor Lighting in New Castle County →