Illinois Landlord-Tenant Laws: Complete Guide for Property Owners
Detailed overview of Illinois rental property laws including security deposits, eviction procedures, rent control, required disclosures, and maintenan...
Legal Disclaimer
This content is for general informational and educational purposes only. It does not constitute legal advice and should not be relied upon as such. Laws change frequently — always verify current regulations and consult a licensed attorney in your jurisdiction for advice specific to your situation. Landager is a property management platform, not a law firm.Information last verified: May 2026.
Operating under a legal framework established since statehood on December 3, 1818, Illinois landlord-tenant law is a mix of state statutes and significant local ordinances. While the state provides a baseline framework, cities like Chicago and Evanston, as well as Suburban Cook County, have their own strict regulations that property managers must follow.
Official Law Citation: The rules and regulations outlined on this page are governed by the Illinois Compiled Statutes (Title 765 - Property) and powerful local municipal ordinances.
Key Illinois Rental Laws at a Glance
Security Deposits
Illinois state law does not limit the amount a landlord can charge for a security deposit. However, local ordinances in Cook County, Evanston, and Oak Park cap the amount at 1.5 times the monthly rent.
State law requires landlords to return the security deposit within 45 days of the tenant moving out. If the landlord makes deductions for property damage, an itemized statement must be provided within 30 days of move-out, along with paid receipts.
For more detail, see our Security Deposits deep dive.
Eviction Procedures
Illinois prohibits landlords from using "self-help" evictions (e.g., changing locks, removing belongings). All evictions must go through the formal Forcible Entry and Detainer process in the Circuit Court of the county where the property is located.
The most common eviction notices include:
- 5-Day Notice to Quit - For non-payment of rent.
- 10-Day Notice to Quit - For lease violations.
- 30-Day Notice - To terminate a month-to-month tenancy without cause.
For more detail, see our Eviction Process guide.
Rent Control and Increases
Illinois currently prohibits local municipalities from enacting rent control measures (Rent Control Preemption Act). There are no state limits on how much a landlord can increase rent.
Rent cannot be increased during the term of a fixed lease unless permitted by the lease agreement. For month-to-month tenancies, landlords must typically provide at least 30 days' written notice.
For more detail, see our Rent Increases guide.
Required Disclosures
Illinois landlords must disclose certain information to tenants before a lease is signed:
- Lead-Based Paint - For properties built prior to 1978 (Federal requirement).
- Radon Disclosure - Required if a landlord performs a test and discovers a radon hazard.
- Flood Disclosure - Starting in 2025, landlords must disclose if the property is in a FEMA flood zone or has experienced flooding in the last 10 years.
- Shared Utility Meters - Landlords must disclose if the tenant will be paying for utilities that serve common areas or other units.
For more detail, see our Required Disclosures guide.
Maintenance and Habitability
Illinois enforces an implied warranty of habitability, meaning residential properties must be fit for human occupation. Landlords must ensure the property adheres to building, housing, and health codes.
If a landlord fails to make necessary repairs, Illinois law (765 ILCS 742) permits tenants to use the "repair and deduct" remedy. If the repair costs less than $500 or half a month's rent (whichever is less), the tenant may give 14 days' written notice, have the work done professionally, and deduct the cost from their rent.
For more detail, see our Maintenance Obligations guide.
Local Ordinances
When leasing in Illinois, property owners must be hyper-aware of local laws. The most notable include:
- Chicago Residential Landlord and Tenant Ordinance (CRLTO): Stringent rules regarding security deposit interest, 30-day return deadlines, and tenant remedies.
- Suburban Cook County (RTLO): Imposes significant protections similar to Chicago for areas outside the city limits.
- Evanston and Oak Park: Both have specialized local ordinances capping security deposits and adjusting eviction protocols.
Always check municipality codes as they often supersede broad state laws with stricter requirements.
Getting Started with Compliance
Managing compliance in Illinois can be complex due to the heavy intersection of state and local laws. Landager helps landlords track security deposit deadlines, coordinate evictions, and maintain proper documentation.
Explore more Illinois compliance topics:
How Landager Helps
Landager tracks lease terms, required compliance items, and accounting records - making it easy to stay compliant with Illinois regulations.
Frequently Asked Questions
▶What are the Illinois landlord-tenant laws every property owner should know?
Illinois landlord-tenant law is a mix of state statutes (765 ILCS) and powerful local ordinances. The state provides a baseline framework covering security deposits, eviction procedures, and habitability, but cities like Chicago (CRLTO), Evanston, and suburban Cook County (RTLO) impose significantly stricter requirements around deposit returns, late fees, and tenant remedies. Non-compliance with local ordinances can result in severe penalties.
▶What is the Chicago RLTO and how does it affect landlords?
The Chicago Residential Landlord and Tenant Ordinance (CRLTO) is one of the most powerful local tenant protection laws in the country. It imposes strict rules on security deposit handling (interest-bearing accounts required), mandates specific lease disclosures, limits late fees, and provides tenants with aggressive remedies including the ability to recover twice the deposit amount if a landlord violates the ordinance. Landlords operating in Chicago must comply with both state law and the CRLTO.
▶What is the Illinois eviction process and how long does it take?
Illinois eviction follows the Forcible Entry and Detainer process. For non-payment, landlords serve a 5-Day Notice to Quit. For lease violations, a 10-Day Notice to Quit is required. To terminate a month-to-month tenancy without cause, 30 days' notice is needed. Self-help evictions (changing locks, removing belongings) are strictly prohibited. In Chicago, the CRLTO imposes additional notice requirements and tenant cure periods that landlords must follow.
Read the complete guide▶What is the Illinois security deposit limit and return deadline?
Illinois state law does not cap security deposit amounts, but Cook County, Evanston, and Oak Park limit deposits to 1.5 times the monthly rent. State law requires deposits to be returned within 45 days of move-out. If deductions are made for property damage, an itemized statement with paid receipts must be provided within 30 days. Chicago's CRLTO requires deposits in interest-bearing accounts with annual interest payments to tenants.
Read the complete guide▶Does Illinois have rent control or caps on rent increases?
No. Illinois passed the Rent Control Preemption Act, which prohibits any city or municipality from enacting rent control measures. There are no state limits on how much a landlord can increase rent. During a fixed-term lease, rent cannot be increased unless the lease explicitly allows it. For month-to-month tenancies, landlords must provide at least 30 days' written notice before any increase takes effect.
Read the complete guide▶What disclosures must Illinois landlords provide to tenants?
Illinois landlords must disclose lead-based paint hazards for pre-1978 buildings, radon hazards if testing reveals elevated levels, flood zone status and flooding history within the past 10 years (new in 2025), and shared utility meter arrangements where tenants may be paying for common area utilities. Chicago adds additional required disclosures including building code violations, foreclosure proceedings, and the full text of the CRLTO summary.
Read the complete guide▶What are Illinois landlord maintenance obligations and habitability standards?
Illinois enforces an implied warranty of habitability, requiring residential properties to be fit for human occupation and comply with building, housing, and health codes. Tenants can use the 'repair and deduct' remedy (765 ILCS 742) for repairs costing less than $500 or half a month's rent — they give 14 days' written notice, have the work done professionally, and deduct the cost from rent. Chicago's CRLTO provides even stronger tenant remedies for habitability failures.
Read the complete guide▶What are the late fee rules for rental properties in Illinois?
Illinois state law does not impose a specific cap on late fees but requires them to be reasonable and stated in the lease. Chicago's CRLTO is more restrictive, capping late fees at $10 per month for rent under $500, and 5% of the monthly rent amount for higher rents. The CRLTO also mandates a 5-day grace period before any late fee can be assessed. Violations of these limits can trigger tenant remedies under the ordinance.
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