Start with 735 ILCS 5/9-101 to 5/9-321. In Illinois, Illinois requires forcible entry and detainer in circuit court (eviction / FED calendar) in the county where the property is located. For nonpayment in most residential tenancies, landlords must give a 5-day written notice to pay rent or quit. Notices for other lease violations are commonly 10 days, and Chicago and other localities may impose additional requirements. That is the question this guide answers for how eviction works. After notice expires, the landlord files an FED complaint and serves summons. Court dates vary by county; judgment for possession leads to an order of possession executed by the sheriff after a short waiting period. Local eviction diversion programs can add time.
The Illinois eviction / forcible entry and detainer framework
After notice expires, the landlord files an FED complaint and serves summons. Court dates vary by county; judgment for possession leads to an order of possession executed by the sheriff after a short waiting period. Local eviction diversion programs can add time.
Exact deadlines vary by county practice, service method, and whether the tenant answers. Commercial leases and subsidized housing can add federal or program-specific rules on top of Illinois law.
Notice requirements before filing
For nonpayment in most residential tenancies, landlords must give a 5-day written notice to pay rent or quit. Notices for other lease violations are commonly 10 days, and Chicago and other localities may impose additional requirements.
A defective notice is one of the most common reasons an eviction is dismissed without prejudice. Landlords should match the notice form and timing to the ground for eviction (nonpayment vs. cureable breach vs. no-cause termination where allowed). Tenants should keep the envelope, text, email, and posting photos.
How the Illinois rule applies
Apply the Illinois authorities in order. The facts are simplified so the statute and the standard are visible.
A residential landlord in Illinois wants possession after unpaid rent and cannot use a lockout.
- Give the notice Illinois actually requires: For nonpayment in most residential tenancies, landlords must give a 5-day written notice to pay rent or quit. Notices for other lease violations are commonly 10 days, and Chicago and other localities may impose additional requirements.
- File forcible entry and detainer in circuit court (eviction / FED calendar) in the county where the property is located under 735 ILCS 5/9-101 to 5/9-321.
- Prove the tenancy, the ground, and proper notice. Tenant defenses include: Defenses include defective notice, implied warranty of habitability, retaliation, discrimination, and Chicago RLTO or other local ordinance violations.
- If the landlord prevails, possession is enforced by writ — Self-help lockouts and utility shutoffs are illegal; landlords must obtain a court order of possession.
After notice expires, the landlord files an FED complaint and serves summons. Court dates vary by county; judgment for possession leads to an order of possession executed by the sheriff after a short waiting period. Local eviction diversion programs can add time.
Where the case is filed
Eviction actions in Illinois are filed in circuit court (eviction / FED calendar) in the county where the property is located. Service must follow Illinois rules — personal service, substitute service, or posting/mailing combinations as authorized. Improper service can void a default judgment.
Hearing, judgment, and writ of possession
After service, the tenant usually has a short window to answer. At hearing the landlord must prove the landlord-tenant relationship, the ground for eviction, proper notice, and (for nonpayment) the rent due. If the landlord prevails, the court issues a judgment for possession and, after any statutory waiting period, a writ of possession executed by the sheriff or constable — not by the landlord personally.
Tenant defenses in Illinois
Defenses include defective notice, implied warranty of habitability, retaliation, discrimination, and Chicago RLTO or other local ordinance violations.
Habitability, retaliation, and discrimination defenses can convert a simple nonpayment case into a longer civil action. Tenants asserting habitability should document repair requests; landlords facing those defenses should document inspections and cure efforts.
Self-help is not a shortcut
Self-help lockouts and utility shutoffs are illegal; landlords must obtain a court order of possession.
Illegal lockouts can expose landlords to statutory damages, attorney's fees, and even criminal penalties in some jurisdictions. The lawful path is notice → forcible entry and detainer → writ.
Practical tips
- Calendar every notice and answer deadline; eviction timelines are intentionally short.
- Bring the lease, ledger, notices, and proof of service to the first hearing.
- Search Illinois opinions for “forcible entry and detainer”, “writ of possession”, and “notice to quit” on LawDiver before a contested trial.
- Subsidized, mobile-home, and hotel-to-housing arrangements may follow different notice statutes — verify the housing type.
Case law: eviction and landlord-tenant in Illinois
NORTON KENT CLORE Et Al., Appellants, v. HARRY FREDMAN Et Al., Appellees; HARRY FREDMAN, Appellee, v. NORTON KENT
…the Peoria Housing Code. Shortly thereafter Fredman filed a forcible entry and detainer action against the Clores. A request by the Clores for consolidation of the two cases was denied. The trial court granted Fredman’s motions for summary judgment in his forcible entry action and for dismissal of the complaint in the class action. Summary judgment was also granted to the City…
Illinois opinions such as NORTON KENT CLORE Et Al., Appellants, v. HARRY FREDMAN Et Al., Appellees; HARRY FREDMAN, Appellee, v. NORTON KENT are cited where eviction / landlord-tenant is disputed. The court stated: "Peoria Housing Code. Shortly thereafter Fredman filed a forcible entry and detainer action against the Clores. A request by the Clores for consolidation of the two cases was denied." That is the language to brief; the rest of the decision supplies the procedural posture.
Emily Chapman v. Timothy Wright
Emily Chapman v. Timothy Wright, 20 Ill. 120 (1858)
…day entered and took possession, and brought his action of unlawful detainer on the 10th day of September, before a justice of the peace, and recovered a judgment on the 6th day of October, 1855 ; that the yearly value is $75, and concluded with demanding $177.86. The second count was for $155.84, rent on the premises from July 6th, 1854, to the termination of the lease. The t…
Practitioners open Emily Chapman v. Timothy Wright when Illinois eviction / landlord-tenant turns on the distinction in this sentence: "September, before a justice of the peace, and recovered a judgment on the 6th day of October, 1855 ; that the yearly value is $75, and concluded with demanding $177.86. The second count was for $155.84, rent on the premises from July 6th, 1854, to the termination of the lease." Do not lift it out of the facts the court was deciding.
Thomas G. Donovan v. Thomas A. Murphy
Thomas G. Donovan v. Thomas A. Murphy, 217 Ill. App. 31 (1920)
…gment of the municipal court in favor of the plaintiff in a forcible detainer suit "brought by him to obtain possession of an apartment in a building known as No. 7131 Eberhart avenue, Chicago. The owner of the building leased the apartment to defendant for a period commencing May 3, 1918, and ending April 30, 1919. _ After the termination of this period the defendant continued…
Thomas G. Donovan v. Thomas A. Murphy is worth reading on Illinois eviction / landlord-tenant because the court put the point in its own words: "No. 7131 Eberhart avenue, Chicago. The owner of the building leased the apartment to defendant for a period commencing May 3, 1918, and ending April 30, 1919." Use that passage as the starting point, then read the facts that precede it.
Harry Fredman, Plaintiff-Appellee, v. Kent Clore Et Al., Defendants-Appellants — Stouder, J., dissenting
…Cal. Rptr. 729, 476 P.2d 97, found a tenant could defend an unlawful detainer action on grounds that the landlord increased rent and commenced an action for eviction in retaliation for a tenant’s demand that certain repairs be made. The court stated, “If wé deny tenants a defense against retaliatory eviction in unlawful detainer actions, we lend the exercise of judicial process…
Harry Fredman, Plaintiff-Appellee, v. Kent Clore Et Al., Defendants-Appellants — Stouder, J., dissenting is worth reading on Illinois eviction / landlord-tenant because the court put the point in its own words: "Cal. Rptr. 729, 476 P.2d 97, found a tenant could defend an unlawful detainer action on grounds that the landlord increased rent and commenced an action for eviction in retaliation for a tenant’s demand that certain repairs be made." Use that passage as the starting point, then read the facts that precede it.
Katherine K. Masters, Appellant, v. Paul H. Smythe, Jr. Et Al., Appellees; Paul H. Smythe, Jr., Appellee, v. Oak
…is also a co-tenant, he could not be proceeded against for unlawful detainer, since he is entitled to remain in possession (Freeman, “Co-tenancy and Partition,” 383), plaintiff, however, did question the existence of the lease in her partition complaint which was filed four months after the rent was due, and which sought a determination of the interest of the parties in the pr…
On eviction / landlord-tenant, Katherine K. Masters, Appellant, v. Paul H. Smythe, Jr. Et Al., Appellees; Paul H. Smythe, Jr., Appellee, v. Oak speaks to the Illinois dispute in this passage: "is also a co-tenant, he could not be proceeded against for unlawful detainer, since he is entitled to remain in possession (Freeman, “Co-tenancy and Partition,” 383), plaintiff, however, did question the existence of the lease in her partition complaint which was filed four month" The surrounding opinion shows how the court applied that language to the record.
A. M. Kaufman v. Jacob Miller
A. M. Kaufman v. Jacob Miller, 214 Ill. App. 236 (1919)
…ment in the Circuit Court of Douglas county in an action of forcible entry and detainer against Jacob Miller, appellant, awarding him the possession of the following described real estate: ‘ ‘ The premises commonly known and described as a tract of land Six (6) rods wide North and South and One Hundred Sixty (160) rods long East and West off of the South side of the Northeast Q…
Practitioners open A. M. Kaufman v. Jacob Miller when Illinois eviction / landlord-tenant turns on the distinction in this sentence: "ment in the Circuit Court of Douglas county in an action of forcible entry and detainer against Jacob Miller, appellant, awarding him the possession of the following described real estate: ‘ ‘ The premises commonly known and described as a tract of land Six (6) rods wide North an" Do not lift it out of the facts the court was deciding.
Patrick Maloney v. J. S. Shattuck
Patrick Maloney v. J. S. Shattuck, 15 Ill. App. 44 (1884)
…third class of cases above specified, and is a suit for an unlawful detainer merely. The complaint alleges that the plaintiff is the owner of, and is entitled to the possession of the premises, and that the defendant unlawfully withholds the possession thereof. Under such a complaint, the entry having been peaceable, it was necessary in order to a recovery that the plaintiff s…
Illinois opinions such as Patrick Maloney v. J. S. Shattuck are cited where eviction / landlord-tenant is disputed. The court stated: "The complaint alleges that the plaintiff is the owner of, and is entitled to the possession of the premises, and that the defendant unlawfully withholds the possession thereof." That is the language to brief; the rest of the decision supplies the procedural posture.
Key takeaways
- Process name: forcible entry and detainer.
- Primary authority: 735 ILCS 5/9-101 to 5/9-321.
- Filing forum: circuit court (eviction / FED calendar) in the county where the property is located.
- Notice: For nonpayment in most residential tenancies, landlords must give a 5-day written notice to pay rent or quit.
- Self-help lockouts: Self-help lockouts and utility shutoffs are illegal; landlords must obtain a court order of possession.
Frequently asked questions
How does eviction work in Illinois?
Illinois uses forcible entry and detainer under 735 ILCS 5/9-101 to 5/9-321. After notice expires, the landlord files an FED complaint and serves summons.
How much notice does a landlord have to give?
For nonpayment in most residential tenancies, landlords must give a 5-day written notice to pay rent or quit. Notices for other lease violations are commonly 10 days, and Chicago and other localities may impose additional requirements.
Can a landlord change the locks without going to court?
Self-help lockouts and utility shutoffs are illegal; landlords must obtain a court order of possession.
What defenses can a tenant raise?
Defenses include defective notice, implied warranty of habitability, retaliation, discrimination, and Chicago RLTO or other local ordinance violations.