Chicago Lease Laws: What Landlords Must Include (and Can't)

A lease is only as strong as Chicago law allows it to be. That's not a warning about sloppy draftsmanship. It's a structural reality of operating as a landlord in a city where the RLTO sets a legal floor that no lease can go below — and where clauses that try to go below that floor aren't just unenforceable, they can be held against you.

Most landlords write or download a lease without thinking much about this. They focus on what the lease says, not on whether what it says is actually binding. In Chicago, those are two very different questions.

This page is the overview of how Chicago lease law works: what the RLTO requires, what it prohibits, and where the gaps between a landlord's intentions and a lease's legal effect most commonly appear.

The RLTO Sets the Floor — Your Lease Can't Go Below It

The Chicago Residential Landlord and Tenant Ordinance establishes a set of rights for tenants that exist regardless of what any lease says. A lease clause that takes away an RLTO right doesn't just fail to work. In some cases, it's treated as evidence that the landlord violated the law — not just that the clause was unenforceable.

This matters most when landlords use template leases downloaded from generic sources that weren't written with Chicago specifically in mind. Those leases often include clauses that are standard in other cities and flatly illegal here. The landlord who signs tenants to a lease with illegal clauses may not find out until the clause gets tested — usually in a dispute, at the worst possible time.

What You're Required to Include

Certain things have to be in a Chicago lease, or have to be provided alongside it, for the tenancy to begin on solid legal footing. Required disclosures, required attachments, required statements — these aren't optional.

The most notable is the RLTO summary document. Chicago landlords are required to provide tenants with a copy of the city's summary of tenant rights under the RLTO at or before the time the lease is signed. This isn't a suggestion. Failing to provide it has real consequences that can show up in a tenant's hands during a dispute.

There are other disclosure requirements too — information about the property's condition, lead paint disclosures depending on the building's age, and others. What has to be disclosed, in what form, and when is a set of specifics that matters more than most landlords realize until they're sitting in eviction court hearing those specifics cited against them.

What You Cannot Include

The RLTO specifically prohibits certain lease provisions. Clauses that waive tenant rights the ordinance grants. Clauses that purport to let the landlord enter without notice. Clauses that exempt the landlord from habitability obligations. Clauses that limit the tenant's right to a return of their security deposit.

A lease that includes these provisions doesn't just fail to enforce them. In some cases, including them is itself a violation. The landlord hasn't just written an unenforceable clause. They've handed the tenant a tool to use against them.

The specific list of what's off-limits is covered in the What Clauses Are Illegal in a Chicago Lease? page, and it's longer than most landlords expect.

Verbal Leases and Written Leases

Chicago recognizes both written and verbal rental agreements. But the practical difference between them is significant. A verbal lease is harder to enforce, harder to prove, and harder to document when things go wrong. The RLTO's specific requirements around lease content apply differently depending on the form of the agreement.

Most of the required disclosures and attachments are keyed to written leases. A landlord operating on a verbal agreement may believe they've avoided paperwork — what they've actually done is removed their own ability to point to a document when disputes arise.

Month-to-Month Leases Are Still Leases

A tenancy without a fixed term isn't a tenancy without rules. Month-to-month leases are still governed by the RLTO. The same entry notice requirements apply. The same habitability obligations apply. The same security deposit rules apply. The same termination notice requirements apply — and they're often where month-to-month landlords are most surprised.

The rules for how a month-to-month tenancy ends, and how much notice each party is entitled to, are as specific as the rules for a fixed-term lease. Operating informally doesn't exempt a landlord from the structure Chicago imposes on every residential tenancy.

Lease Renewals Are a Separate Decision

When a fixed-term lease expires, what happens next depends entirely on what you communicate and when. Renewing on the same terms, renewing on different terms, not renewing at all — each of those paths has its own notice requirements and procedural rules.

A landlord who assumes the lease simply rolls over, or that they can change the terms at renewal without specific notice, or that not saying anything means the tenant knows to leave — all of those assumptions are wrong in Chicago, and all of them are covered in the articles below.