Sign Regulations in Naperville, IL (2026)
4 verified sign regulations for Naperville, Illinois, sourced directly from the municipal code and official government pages.
Verified from official government sources
Garage Sale Signs
Naperville caps temporary non-commercial signs like garage-sale placards at 6 square feet and 5 feet tall, with no permit required for wall or ground-mounted versions on residential property.
Naperville Garage Sale Sign Rules
Some RestrictionsNaperville Municipal Code § 6-16-4(1.7)
In addition to the signs noted specifically in this Section, each property is allowed temporary non-commercial, non-illuminated wall and ground mounted temporary signs subject to the following requirements: 1.7.1 Sign area per individual sign shall be a maximum of six (6) square feet. 1.7.2 Sign height shall be a maximum of five (5) feet, including any support structure.
Holiday Displays
Naperville exempts decorative seasonal lighting from its general exterior lighting standards, but only if the total power rating stays at or below 75 watts under the zoning code's outdoor lighting rules.
Naperville Holiday Lighting Wattage Limit
Light RestrictionsNaperville Municipal Code § 6-14-4, Subsection 3.5.3
3.5.3. Decorative seasonal lighting shall be limited to a power rating of less than or equal to seventy-five (75) watts.
Digital Billboards
Naperville treats electronic message boards as a 'changeable copy sign' under Municipal Code section 6-16-5, subsection 2.2.3: the digital or changeable portion of a ground sign cannot exceed 50 percent of the sign's permitted maximum area, and the display can change no more than once every 10 seconds with static images only. Changeable-copy signs and electronic message boards of any kind are banned outright in the Downtown Central Business District.
Naperville Changeable Digital Sign Rules
Significant RestrictionsNaperville Municipal Code § 6-16-5, Subsection 2.2.3
CHANGEABLE COPY SIGN: A component of a sign that features changeable text, characters, and/or illustrations that allows the sign's display to be amended, updated or otherwise modified. Electronic message boards are a type of changeable copy sign... 2.2.3Changeable Signage: Changeable signage cannot exceed fifty percent (50%) of the permitted maximum sign area of a ground sign. The sign shall ch...
Window Signs
Naperville exempts window signs from a sign permit but still caps their size under Municipal Code section 6-16-5(1.7): no single window pane may carry more than 75 percent coverage, and total window signage on a storefront elevation cannot exceed 50 percent of the total window surface area. A 'window sign' is anything installed inside, painted on, or placed against the glass.
Naperville Storefront Window Sign Coverage Limits
Light RestrictionsNaperville Municipal Code § 6-16-5(1.7)
WINDOW SIGN: A sign installed inside, painted upon, or placed against a window for purposes of viewing from outside the premises, excluding merchandise located in a window display... 1.7Window Signs: Shall occupy a maximum of seventy-five (75) percent of a single window pane and no more than fifty (50) percent of the total window surface area per storefront elevation. See illustration in Sectio...
Looking for DuPage County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Naperville city rules.
Sign Regulations in DuPage County →