Longmont, CO Sign Regulations: Window Signs (2026)
Key Facts
- Permit required
- no, if within coverage limit
- Single-panel window cap
- 25% of window opening
- Multi-panel window cap
- 50% of one panel
- Code section
- § 15.06.020.D
Summary
Longmont exempts window signs from a sign permit, but caps them at 25% of a window opening, or 50% of any single panel if the window is divided into multiple panels.
D.Window signs. Window signs are allowed and are exempt from the sign permit requirement, provided window signage does not cover more than 25 percent of a window opening or 50 percent of any one window panel if a window opening contains multiple window panels.E.Signs located inside a building. Signs located inside a building are allowed and are exempt from the sign permit requirement provided any interior sign within six feet of any window shall not have any flashing or moving lights, including video monitors and electronic message signs.F.Integral signs. Any inscription carved into stone or similar material that is integral to a building, such as is commonly found on cornerstones or stamped into sidewalks, is allowed and is exempt from the sign permit requirement. Such integral signs shall not exceed 12 square feet in area. (Code 2009, § 15.06.020; Ord. No. O-2025-10, § 4, 1-28-2025)
Full Breakdown
Under Longmont's sign code, window signs don't need a sign permit at all -- but the exemption comes with a size cap. Signage placed in a window can't cover more than 25 percent of the window opening. Where a window is divided into multiple panels, the limit loosens to 50 percent of any one panel. A related rule covers interior signs near windows: any sign inside a building within six feet of a window can't include flashing lights or video monitors, per § 15.06.020.E.
Violations & Fines
Window signage that exceeds the 25%/50% coverage cap loses its permit exemption; displaying it without obtaining a sign permit is a code violation.
Frequently Asked Questions
Do window signs need a permit in Longmont?
How much of a storefront window can be covered with signage?
Sources & Official References
Other rules in Longmont
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Window Signs in Nearby Cities
How other cities in Boulder County handle window signs.