Illinois Trespasser Removal Law 2026: Police Authority

Public Act 104-0029, originating as Senate Bill 1563, adds language to the Eviction Article of Illinois' Code of Civil Procedure clarifying that nothing in that article prohibits law enforcement from enforcing the offense of criminal trespass, or interferes with the ability of police to remove persons or property from a premises when a criminal trespass is occurring.

[Cite: Illinois Public Act 104-0029 (SB 1563), amending 735 ILCS 5/9-101 et seq.]

That's a clarification of jurisdiction, not a new criminal offense. Criminal trespass was already illegal in Illinois before this law passed; what this act does is settle the question of whether the Eviction Article's general framework for removing occupants somehow overrode or blocked police from acting on that existing criminal statute.

Before this law, some property owners and even some responding officers treated the Eviction Article as requiring court process for any removal of any occupant from residential property, regardless of whether that occupant had ever been a lawful tenant. That reading effectively meant a true squatter, someone who broke into a vacant property with no lease, no permission, and no tenancy relationship whatsoever, got the practical benefit of eviction-style delay, simply because the property in question was residential.

[Cite: Illinois Public Act 104-0029 (SB 1563)]

This act pushes back against that reading specifically for situations that meet the definition of criminal trespass, confirming police retain authority to act in those cases rather than being told to defer entirely to civil eviction court.

The underlying criminal trespass offense this law references covers three separate ways someone can commit it: knowingly and without lawful authority entering and remaining within a building, entering upon another's land after receiving notice that entry is forbidden, or remaining upon another's land after receiving notice to depart.

[Cite: Illinois Criminal Code criminal trespass provisions]

Each of those three prongs requires either an absence of lawful authority from the start, or a notice-and-refusal-to-leave pattern. That framework is what has to be met before police enforcement authority under this clarification comes into play at all.

This is the point worth being direct about, because it's the exact question the tracker flagged for this article, and it's a limitation legal commentators reviewing this law have consistently pointed out as well. The statute doesn't specify a precise mechanism or test for distinguishing a genuine trespasser from a holdover tenant, an unpaid lessee, or someone else with a more complicated tenancy history. It also doesn't clarify whether enforcing criminal trespass under this provision requires an arrest, or what specific proof of ownership a property owner needs to show responding officers.

[Cite: multiple independent legal analyses of Illinois Public Act 104-0029]

That gap isn't a failure of research into this topic; it's a genuine, acknowledged open question in how this law actually gets applied in practice. Multiple attorneys writing about this law recommend that municipalities consult their own legal counsel and provide specific officer training, precisely because the statute leaves this line-drawing to case-by-case judgment rather than a bright-line statutory test.

A holdover tenant, someone who was a lawful tenant under a lease that has since expired but who hasn't vacated, occupies fundamentally different legal ground than someone who never had permission to be on the property at all. A holdover tenant's continued presence typically doesn't meet the "knowingly and without lawful authority" element of criminal trespass in the same clean way a true squatter's presence does, precisely because that person did, at some point, have lawful authority to be there.

[Cite: Illinois Criminal Code criminal trespass provisions]

That distinction is exactly why property owners and property managers shouldn't read this law as a general-purpose replacement for eviction whenever a tenant becomes difficult, stops paying rent, or overstays a lease term. Those situations retain characteristics that make the formal eviction process the more legally sound, and often the legally required, path.

Secondary guidance on this law describes a practical standard some jurisdictions are applying: police may remove an occupant on the spot if the property owner can demonstrate proof of ownership and the occupant has no valid lease. This isn't language pulled directly from the statute itself, since the statute doesn't specify this test, but it reflects how the clarification is being understood and applied in practice by some commentators and, presumably, by some law enforcement agencies.

[Cite: independent legal analyses and industry guidance on Illinois Public Act 104-0029]

Given that this standard isn't spelled out in the statute itself, a property owner shouldn't assume every police department or every individual officer will apply it consistently, or that showing up with a deed will automatically resolve a borderline situation involving someone who has some history with the property.

Because the statute confirms police authority without defining the exact boundary of when that authority applies, a property manager relying on this law for a genuinely ambiguous occupant, someone who paid rent at some point, someone who was invited by a prior tenant, or someone whose departure and reentry history is unclear, is taking on real legal risk if that reliance turns out to be misplaced. An improper removal of someone who actually had tenancy rights can expose an owner to liability for an illegal lockout, regardless of what this new clarification says about clear-cut trespass cases.

[Cite: Illinois Public Act 104-0029 (SB 1563); independent legal analyses]

For the overwhelming majority of landlord-tenant disputes, a non-paying tenant, an overstaying tenant, a tenant violating lease terms, this law changes nothing about the underlying process. Those situations still require the formal eviction process through Illinois courts. This clarification is narrowly aimed at the specific category of occupant who never had a lawful basis to be on the property in the first place, or who has received clear notice to leave and refused, meeting the criminal trespass elements described above.

[Cite: Illinois Public Act 104-0029 (SB 1563)]

Because the statute leaves the practical mechanics of enforcement to individual departments, how quickly and readily police in a given Illinois municipality act on this clarification may vary. A property owner in one jurisdiction might find local police willing to act promptly once ownership is established and no lease exists, while another jurisdiction's officers might still default to directing an owner toward civil eviction court for anything short of an obvious break-in. That inconsistency is a direct consequence of the statute not providing a uniform enforcement standard.

[Cite: independent legal analyses of Illinois Public Act 104-0029]

The practical starting point is treating this law as applicable only to the clearest cases, a property that was vacant and secured, with no lease, no prior tenancy relationship, and a person who entered without permission or who has refused a clear notice to leave. For anything less clear-cut, including any occupant with a documented history of paying rent, holding a lease, or being invited onto the property by someone with authority, continuing to pursue formal eviction remains the more defensible path.

Coordinating with local police departments and legal counsel before relying on this provision, specifically to understand how that particular jurisdiction is interpreting and applying the trespass-versus-tenant line, is worth doing before an actual incident arises, given how much discretion individual departments appear to have under the current statutory language.