Signage Rules: Boulder vs Longmont
How do signage rules rules compare between Boulder, CO and Longmont, CO?
Longmont has fewer restrictions than Boulder.
Boulder, CO
Boulder County
Boulder prohibits external business signage at home occupations. No commercial evidence visible from the street.
View full Boulder rules →Longmont, CO
Boulder County
Longmont prohibits visible exterior signage for home occupations. Signage for home-based businesses is governed by LMC Chapter 15.06 (Signs), and the home occupation standards in Title 15 require that the activity remain clearly incidental and subordinate to the residential use — meaning no on-premises advertising visible from the street.
View full Longmont rules →Key Facts Comparison
| Fact | Boulder | Longmont |
|---|---|---|
| Signs | Prohibited externally | - |
| Vehicles | No commercial signage | - |
| Windows | No displays | - |
| HOA | Even stricter | - |
| Code Section | - | LMC Ch. 15.06 (Signs) + Title 15 Home Occupation Standards |
| Exterior Business Signs | - | Prohibited in residential zones |
| Illuminated Signs | - | Prohibited |
| Window Signs Advertising Business | - | Prohibited |
| Vehicle Lettering | - | Generally permitted (personal/business vehicle) |
| Enforcement | - | Code Enforcement — (303) 651-8695 |
Highlighted rows indicate differences between cities.
Boulder FAQ
Can I put up a sign?
No. External business signage is prohibited at home occupations.
What about my work vehicle?
Commercial vehicles with signage may be restricted. Check Boulder and HOA rules.
Longmont FAQ
Can I put a sign in my yard for my home-based business in Longmont?
No. The Home Occupation standards in Longmont's Land Development Code (Title 15) require that the business remain clearly incidental to the dwelling with no exterior evidence visible from the street. Yard signs, A-frames, illuminated signs, and window signs advertising a home business are prohibited in residential zones. A standard residential address nameplate is acceptable.
Can I leave my work van with company lettering parked at my Longmont home?
Yes, typically. Lettering on a personal or business vehicle parked at your own residence is generally allowed and is not considered a 'sign' under LMC Chapter 15.06. Parking commercial trucks over a certain size in residential zones, however, may be restricted under separate parking provisions in the Land Development Code.
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