Subletting in Chicago: What Renters Need to Know

In most U.S. cities, whether you can sublet your apartment comes down entirely to what your lease says — landlords can simply ban it. Chicago is different: if your unit is RLTO-covered, the ordinance gives tenants a real, if conditional, right to sublet that your landlord generally can't just refuse.

This is educational information, not legal advice.

The RLTO's sublease rule

Under the RLTO's subleasing provision (Municipal Code of Chicago, commonly cited as § 5-12-120), a landlord of an RLTO-covered unit is generally required to accept a reasonable sublease proposed by the tenant, without charging an additional fee or penalty for it, as long as the proposed sublease doesn't violate legitimate terms of the original lease and the proposed subtenant would otherwise be a qualified tenant. A landlord can't simply refuse a lawful sublet outright, and can't retaliate against a tenant for proposing one. Confirm the current exact section number and text before relying on a specific citation, since ordinance section numbers can be renumbered over time.

This is a meaningfully different rule from many other markets — in Texas, for example, there's no statewide right to sublet at all, and the lease fully controls. Chicago's RLTO instead builds in tenant-favorable defaults.

Subletting vs. assignment: know the difference

• A sublease means you rent your unit (or part of it) to someone else for some or all of the remaining lease term, but you remain on the hook to your landlord — the subtenant pays you, and you're still responsible for the rent and the unit's condition under your original lease. If the subtenant doesn't pay or damages the unit, that's still your problem with your landlord.
• An assignment transfers your entire remaining lease obligation to someone else, who steps fully into your shoes with the landlord — done correctly, you're released from further liability. Assignments generally require the landlord's affirmative consent in a way subletting doesn't automatically require under the RLTO, and lease terms on assignment can vary more than the RLTO's sublease default.

If you're leaving Chicago for good and want out of your lease completely, an assignment (if your landlord will agree) protects you better than a sublease, where you're still ultimately liable if things go wrong.

How to actually do it

1. Read your lease first. Even where the RLTO requires a landlord to accept a reasonable sublease, your lease may set out a specific request process (written notice, information about the proposed subtenant, a timeline) — following it avoids giving your landlord a technical reason to object.
2. Propose a specific, qualified subtenant in writing — not just an abstract request to sublet. A landlord's obligation to accept a "reasonable" sublease is about a reasonable, qualified subtenant and terms, not a blank-check right to sublet to anyone at all.
3. Get the landlord's response in writing — an approval, a request for more information, or a refusal with a stated reason. If your landlord refuses without a legitimate basis, that's exactly the kind of dispute worth documenting carefully and, if needed, raising with a tenant-rights organization or attorney.
4. Put the sublease itself in writing — rent amount, term, security deposit handling, and who's responsible for what. Remember you're still liable to your landlord under your original lease regardless of what the sublease with your subtenant says.

What if your unit isn't RLTO-covered?

If your building falls under the RLTO's owner-occupied, 6-units-or-fewer exemption (MCC § 5-12-020(a) — see our RLTO coverage guide), the RLTO's sublease-acceptance rule generally doesn't apply, and your lease's own subletting clause controls instead — some leases ban subletting outright, others allow it with landlord consent. Read your specific lease.

Frequently asked questions

Can my Chicago landlord just say no to any sublease?

For an RLTO-covered unit, generally not — the landlord must accept a reasonable, qualified sublease under the RLTO's subleasing provision, without an extra fee, as long as it doesn't violate legitimate lease terms. This doesn't mean they must accept literally any proposed subtenant regardless of qualifications.

Am I still responsible for rent if my subtenant doesn't pay?

Yes, generally — a sublease doesn't release you from your original lease obligations to your landlord. If you want to be fully released, you'd need an assignment (or a separate agreement) that your landlord accepts, not just a standard sublease.

Can my landlord charge me a fee to approve a sublease?

Under the RLTO's sublease rule, generally no — accepting a reasonable, qualified sublease shouldn't come with an additional fee or penalty for an RLTO-covered unit. Confirm current ordinance language if a landlord tries to charge one.

What's the difference between subletting and having a roommate?

Subletting generally means someone else takes over your role as tenant for some or all of the term while you're not living there (or are stepping back). Adding a roommate who lives with you and is added to the lease is a different arrangement — see our roommate agreements guide for that situation specifically.