Lake County, IL Home Business: Signage Rules (2026)
Key Facts
- Signs allowed for home occupations
- None, § 151.113(E)(8)
- Exterior visibility rule
- No visible evidence of business, (E)(10)
- Zoning approval required first
- Zoning certificate, (E)(1)
- Illegal signs subject to
- Forfeiture and confiscation
- Non-emergency cure period
- 10 days after notice
- General penalty
- Up to $1,000/day, § 10.99
Summary
Home occupations in unincorporated Lake County get zero exterior signage. Section 151.113(E)(8) states plainly that no signs shall be allowed, and the code backs it up by banning any visible exterior evidence at all that a business operates on the property.
(E) Customary home occupations.
(1) General. Some types of work can be conducted at home with little or no effect on the surrounding neighborhood. The home occupation regulations of this subsection (E) are intended to permit residents to engage in customary home occupations, while ensuring that the home occupations will not be a detriment to the character and livability of the surrounding area. The regulations require that home occupations (an accessory use) remain subordinate to the allowed principal use (residential) and that the residential viability of the dwelling unit is maintained. Approval of a zoning certificate shall be required.
(4) Size. A home occupation shall occupy less than 50% of the floor area of the principal dwelling unit. ...
(8) Signs. No signs shall be allowed.
(9) Location. All activities and storage areas associated with home occupations must be conducted and located inside the principal dwelling unit, not in detached buildings or garages.
(10) Exterior appearance. There shall be no visible evidence of the conduct of a home occupation when viewed from the street right-of-way or from an adjacent lot.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-15: Supplement contains: Local legislation current through Ord. 26-0618, passed 6-9-2026 | State legislation current through ILCS Pamphlet 2025 #5).
Full Breakdown
113(E) of the Unified Development Ordinance, and subsection (E)(8) is a single, unqualified sentence: 'Signs. 113, which is allowed one sign up to one square foot. The signage ban sits alongside a broader exterior-appearance rule at (E)(10): there can be no visible evidence of the home occupation from the street right-of-way or an adjacent lot, and the code specifically flags things like commercial-style parking lots, paved setbacks, or commercial exterior lighting as the kind of change that would make the dwelling look less residential. Read together, the two subsections mean a home business cannot use a yard sign, a window sign, a sandwich board, or vehicle-mounted advertising visible from outside the lot, since any of those would both violate (E)(8) directly and defeat the no-visible-evidence standard of (E)(10).
All of this rides on top of the home occupation's other conditions: it has to occupy less than 50% of the dwelling's floor area, be run by a full-time resident operator, and first get a zoning certificate under (E)(1) before opening at all.
Violations & Fines
Posting a sign for a home occupation violates Section 151.251(F) and (H), covering unlawful sign installation and use inconsistent with permit conditions. The Planning, Building and Development Director enforces the chapter, gives non-emergency violators a 10-day notice to cure (Section 151.257(A)), and can order the sign removed. Any sign placed in violation is subject to forfeiture and confiscation, and the county may recover the full cost of removal and disposal from the sign's owner (Section 151.253(I)). Continued noncompliance can bring a stop-work order, permit revocation, or injunctive relief, and each week of an uncorrected violation counts as a separate offense (Section 151.252). The default penalty under Section 10.99 runs up to $1,000 per day. Appeals go to the Zoning Board of Appeals under Section 151.058.
Frequently Asked Questions
Can I put a small sign in my yard advertising my home business?
What about a sign in my window, not the yard?
Does the county actually remove illegal home business signs?
Is there any home business in the county that is allowed a sign?
Sources & Official References
Other rules in Lake County
Compare Lake County to another location·View the Illinois home business overview
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