McHenry County, IL Home Business: Signage Rules (2026)
Key Facts
- Crystal Lake max sign
- One square foot
- Lighting
- Unlighted only
- Type
- Name plate / business sign
- Exterior display
- None visible from outside
- Section
- Crystal Lake UDO § 2-400C.3
Summary
Home-business signs are tightly limited so the property still looks residential. In Crystal Lake a home occupation may display only an unlighted name plate or business sign of no more than one square foot. McHenry County allows a home occupation only where its existence is not apparent from outside the
Signage is restricted to an unlighted name plate or business sign with an overall size of no more than one square foot, per the provisions of Section 4-1000, Signs.
Full Breakdown
Crystal Lake UDO § 2-400C.3 caps home-occupation signage at a single unlighted, one-square-foot name plate under the city's sign rules (§ 4-1000), and bars any commercial display visible from outside the dwelling. In unincorporated McHenry County the UDO permits no offensive external evidence of the business; the home occupation must remain incidental and not advertise beyond what zoning allows.
Violations & Fines
An oversized, illuminated or non-permitted home-business sign violates the sign ordinance and can be ordered removed, with municipal fines for continued display.
Frequently Asked Questions
Can I put up a sign for my home business?
Does McHenry County allow home-business signs?
Sources & Official References
Other rules in McHenry County
Compare McHenry County to another location·View the Illinois home business overview
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