Kane County, IL Property Maintenance: Vacant Lot Maintenance (2026)
Key Facts
- Grass height cap
- 12 inches on residential parcels
- Noxious weeds
- banned on any unincorporated parcel
- Ag exemption
- zoned & used farmland fully exempt
- Fine
- up to $500 per day
- Liability
- owner, tenant, occupant jointly liable
- Unpaid cleanup
- becomes tax-roll lien
Summary
Empty and unimproved parcels in unincorporated Kane County still have to stay under twelve inches of grass and clear of noxious weeds like Canada thistle or musk thistle. The county's nuisance code applies whether or not anyone lives on the lot, and it makes the owner of record, not just a tenant or occupant, responsible once the county gives notice.
It is hereby declared that any of the following activities and/or conditions are nuisances, when not conducted in accordance with this chapter and are unlawful when conducted or allowed to exist on property located within the County, but outside the corporate limits of any city or village therein; whether conducted, allowed, suffered or permitted by the owner, tenant, and/or other occupant thereof (it being the intent of this chapter to make all such persons jointly and severally liable for compliance herewith): 1. Noxious Weeds: To keep, maintain or grow noxious weeds or other vegetation which creates a health or safety hazard to the public. Excluded from the provisions of this subsection are prairie plants, lands or portions of any lands located in a public nature area, and any property owned or leased by a unit of government. All noxious weeds are to be removed from property. 2. Overgrown Residential Yard: To allow vegetation defined as grass to exceed twelve inches (12") in height on a residential use parcel located within the county. Excluded from the provisions of this subsection are prairie plants.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-17: Code current through: Ord. 26-183, passed 4-14-2026).
Full Breakdown
Kane County Code § 15-2(A) declares a list of nuisances unlawful on any property 'located within the County, but outside the corporate limits of any city or village,' whether caused by the owner, a tenant or another occupant, all of whom are made jointly and severally liable for compliance. Two of those provisions reach a vacant or unimproved lot directly. Subsection (A)(1), Noxious Weeds, bans keeping, maintaining or growing noxious weeds or other vegetation that creates a health or safety hazard, and requires that all noxious weeds be removed from the property; that ban applies countywide, not just to residential land, so a bare lot overrun with Canada thistle, musk thistle, johnsongrass or kudzu, the species the Illinois Noxious Weed Rule lists, is a violation even with no structure on it.
Subsection (A)(2), Overgrown Residential Yard, separately caps grass at twelve inches on any residential-use parcel, occupied or not. Both provisions carve out prairie plants, and the noxious-weeds ban also exempts public nature areas and land owned or leased by a unit of government. Section 15-3 goes further for farmland: any parcel that is both zoned and primarily used for agriculture is exempt from the whole chapter, so an unimproved agricultural field isn't held to either the weed ban or the grass cap. Once a violation is found, § 15-5 requires a written notice identifying the location, the violation, the required fix and a compliance deadline before the county can pursue further action, though a notice is not required before filing a complaint under the Administrative Adjudication process in Chapter 2, Article IX.
Fines reach $500 per day under § 15-6, and unresolved cleanup can be billed to the owner and turned into a tax lien under § 15-7.
Violations & Fines
A vacant-lot weed or grass complaint starts with a written notice under § 15-5 naming the location, the specific violation and a deadline to mow or clear the growth. Missing that deadline lets the county file an administrative adjudication complaint and seek fines of up to $500 per day under § 15-6. If the lot still isn't cleared, § 15-7 lets the county hire a contractor to cut it and bill the owner, with any unpaid balance becoming a lien against the property at the next tax roll.
Frequently Asked Questions
Does the grass-height limit apply to a lot with no house on it?
Are farm fields exempt from the weed and grass rules?
Who is responsible for weeds on a vacant lot, the owner or a tenant?
What happens after Kane County cites a vacant lot for weeds?
Sources & Official References
Other rules in Kane County
Compare Kane County to another location·View the Illinois property maintenance overview
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