Boulder County, CO Home Business: Signage Rules (2026)
Key Facts
- Max sign size
- Two square feet or less
- Illumination
- Not permitted
- Sign type
- Identification only
- Off-site effects
- None beyond property line
- Code
- BCLUC Article 4-516(S)
Summary
A home occupation in unincorporated Boulder County may display only a small identification sign. The Land Use Code limits it to a non-illuminated sign of two square feet or less, and the business must produce no noise, light, odor, or other effect noticeable beyond the property line.
Has signage limited to a non-illuminated identification sign two square feet or less in size.
Full Breakdown
The Boulder County Land Use Code allows a home occupation only if it "Has signage limited to a non-illuminated identification sign two square feet or less in size." The activity must also not "result in noise or vibration, light, odor, dust, smoke, or other air pollution noticeable at or beyond the property line," and must remain clearly subordinate to the residence. In effect there can be no illuminated, flashing, or large commercial signage advertising the business at a county home. Inside incorporated cities, the city's sign code governs instead.
Violations & Fines
An illuminated or oversized business sign is a Land Use Code violation and can trigger a notice of violation requiring removal of the non-conforming signage.
Frequently Asked Questions
Can I put a lighted sign for my home business?
Can customers tell a business operates there?
Sources & Official References
Other rules in Boulder County
Compare Boulder County to another location·View the Colorado home business overview
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