Last updated: August 4, 2026
Illinois Landlord-Tenant Laws 2026: Chicago RLTO + Rules
Illinois landlord-tenant law operates on two levels: statewide statutes (765 ILCS 705–742) and local ordinances — most notably the Chicago RLTO, the strongest local tenant protection in the Midwest. Chicago landlords face stricter deposit, notice, and disclosure rules with penalties of 2x deposit plus attorney fees for violations.
Key Takeaways
- NO statewide rent control — Illinois Rent Control Preemption Act (70 ILCS 3/1) prohibits local rent control ordinances
- Chicago RLTO (Residential Landlord and Tenant Ordinance) — strongest local tenant protection in the Midwest
- Security deposits: must hold in federally insured interest-bearing account (RLTO), return within 30 days (statewide) or 45 days (Chicago with deductions)
- Chicago requires: interest payment annually, move-in/move-out checklist, specific disclosure documents
- Penalty for violations: 2x deposit (statewide) or 2x deposit + interest + attorney fees (Chicago RLTO)
- Cook County RTLO (2021) — just cause eviction for unincorporated Cook County
Illinois landlord-tenant law is governed by statewide statutes (765 ILCS 705–742) with significantly stricter rules in Chicago under the RLTO. The state prohibits rent control, requires interest-bearing deposit accounts, and mandates 30-day deposit returns. Chicago adds move-in checklists, annual interest payments, and 2x deposit penalties plus attorney fees for any violation — making the RLTO the most common source of tenant lawsuits in Illinois.
Statewide Law Overview (765 ILCS 705–742)
Illinois has several statewide statutes governing the landlord-tenant relationship. These apply everywhere in Illinois, but many cities — especially Chicago — add stricter local requirements on top.
Security Deposit Interest Act (765 ILCS 715)
Landlords with 25+ units must hold deposits in federally insured interest-bearing accounts and pay interest annually. Applies statewide.
Security Deposit Return Act (765 ILCS 710)
Deposits must be returned within 30 days if no deductions, or within 30 days with an itemized statement of damages. Penalty for non-compliance: 2x deposit amount.
Retaliatory Eviction Act (765 ILCS 720)
Landlords cannot evict, raise rent, or decrease services in retaliation for a tenant reporting code violations, organizing a tenant union, or exercising legal rights.
Rent Control Preemption Act (70 ILCS 3/1)
Prohibits any unit of local government from enacting rent control ordinances. There is no rent control anywhere in Illinois. Landlords can raise rent by any amount with proper notice.
Implied Warranty of Habitability
Established by case law (Jack Spring, Inc. v. Little, 1972). Landlords must maintain rental units in habitable condition. Tenants may withhold rent or repair-and-deduct if violations are not addressed after 14-day written notice.
Chicago RLTO Deep Dive
The Chicago Residential Landlord and Tenant Ordinance (RLTO) applies to most residential rentals within Chicago city limits. With approximately 1.1 million renter-occupied households, the majority of Illinois tenants are covered by these rules. The RLTO is significantly stricter than statewide law.
RLTO Requirement
Security Deposit Rules
Must hold in federally insured interest-bearing account. Must pay interest annually at the rate set by the city comptroller. Must provide move-in checklist within 3 days of move-in. Must return deposit within 30 days (no deductions) or 45 days (with itemized deductions and receipts within 30 days).
RLTO Requirement
Required Disclosures at Lease Signing
- RLTO Summary (city-provided document)
- Move-in/move-out condition checklist
- Name and address of deposit financial institution
- Utility billing disclosure (if landlord bills for shared utilities)
- Code compliance history (if requested)
- Lead paint disclosure (for pre-1978 buildings)
- Radon disclosure
- Bed bug disclosure
RLTO Requirement
Lock Changes and Entry
Landlords must provide 2 days’ written notice before entering a unit (except emergencies). Tenants can change locks but must provide the landlord with a key. No statewide entry statute exists — this is a Chicago-only rule.
RLTO penalty for ANY violation: Tenant can recover 2x the security deposit amount + accrued interest + court costs + attorney fees. This applies even to technical violations like paying interest one day late. The RLTO is the most common source of tenant lawsuits in Illinois.
LeaseBase tracks compliance deadlines for your specific properties.
Try Free →Cook County RTLO (2021)
The Cook County Residential Tenant and Landlord Ordinance (RTLO), effective June 1, 2021, extends tenant protections to unincorporated areas of Cook County. It covers approximately 130,000 residents and introduced just cause eviction requirements.
Just Cause Required
- Nonpayment of rent
- Lease violation (after notice)
- Illegal activity
- Owner move-in
- Building demolition
- Substantial renovation
Rent Increase Notice
- 30 days’ notice for increases under 5%
- 60 days’ notice for increases of 5% or more
- No cap on amount (not rent control)
- Written notice required
Note: The Cook County RTLO does NOT apply inside Chicago city limits — Chicago has its own RLTO. The RTLO covers unincorporated Cook County and municipalities that have not opted out.
Security Deposit Rules
| Rule | Statewide | Chicago RLTO |
|---|---|---|
| Deposit limit | No statutory limit | No statutory limit |
| Interest-bearing account | 25+ units only | All rentals |
| Interest payment | Annually (25+ units) | Annually (all rentals) |
| Return deadline | 30 days | 30 days (no deductions) / 45 days (with deductions) |
| Move-in checklist | Not required | Required within 3 days |
| Penalty | 2x deposit | 2x deposit + interest + attorney fees |
Deep dive: See our Illinois Security Deposit Laws guide for detailed rules, interest rate requirements, and common RLTO violations.
Eviction Overview
Illinois eviction (formally called “forcible entry and detainer”) is governed by 735 ILCS 5/9-101 et seq. The process begins with proper notice, followed by a court filing in the circuit court of the county where the property is located.
| Notice Type | Days | When to Use | Statute |
|---|---|---|---|
| 5-Day Notice | 5 | Nonpayment of rent | 735 ILCS 5/9-209 |
| 10-Day Notice | 10 | Lease violation (curable) | 735 ILCS 5/9-210 |
| 30-Day Notice | 30 | Terminate month-to-month | 735 ILCS 5/9-207 |
Uncontested
Timeline: 30–60 days
Cost: $2,000–$4,000
Contested (Cook County)
Timeline: 90–180 days
Cost: $4,000–$7,000
Full guide: See our Illinois Eviction Process guide for step-by-step instructions, costs, and Cook County vs. collar county differences.
Required Disclosures
Lead Paint Disclosure (Federal + State)
Required for all pre-1978 residential properties. Must provide EPA pamphlet and disclose known lead-based paint hazards. Federal requirement under 42 USC §4852d.
Radon Disclosure (420 ILCS 46)
Illinois requires disclosure of known radon hazards. The Illinois Emergency Management Agency publishes a radon information pamphlet that must be provided to tenants.
Bed Bug Disclosure (Chicago RLTO)
Chicago landlords must disclose any known bed bug infestations within the past 12 months for the unit and adjacent units. Written disclosure required at lease signing.
Chicago RLTO Summary
Chicago landlords must provide a copy of the city-published RLTO summary to every tenant at lease signing. Failure to provide this document can result in penalties.
Utility Billing Disclosure (Chicago)
If a landlord bills tenants for shared utilities (ratio utility billing), the method of allocation must be disclosed in writing before lease signing.
Frequently Asked Questions
Is there rent control in Illinois?
No. The Illinois Rent Control Preemption Act (70 ILCS 3/1) prohibits any unit of local government from enacting, maintaining, or enforcing rent control ordinances. This means no city, county, or municipality in Illinois can cap rent increases. Landlords can raise rent by any amount with proper written notice — typically 30 days for month-to-month tenancies. The Cook County RTLO requires 60 days’ notice for increases of 5% or more, but this is a notice requirement, not a cap.
Does the Chicago RLTO apply to all Chicago rental properties?
The RLTO covers most residential rentals within Chicago city limits, but there are exemptions. Owner-occupied buildings with six or fewer units are exempt from some (but not all) provisions. Hotels, hospitals, and certain institutional housing are fully exempt. However, even exempt properties must comply with the security deposit interest and return provisions. When in doubt, assume the RLTO applies — the penalties for non-compliance are severe.
What is the penalty for violating the Chicago RLTO deposit rules?
The penalty is two times the security deposit amount plus any accrued interest, plus the tenant’s reasonable attorney fees and court costs. This applies to ANY violation — including failing to pay interest on time, failing to provide a move-in checklist, or failing to disclose the financial institution holding the deposit. These are strict liability penalties, meaning the landlord’s intent does not matter. Many Chicago landlords have been successfully sued for technical violations they were not aware of.
Illinois Landlord Resources
Illinois Eviction Process
Step-by-step guide with timelines, costs, and Cook County vs. collar county differences.
Read the guide →Security Deposit Laws
Statewide vs. Chicago RLTO deposit rules, interest requirements, and penalty exposure.
Read the guide →Eviction Notice Templates
Free copy-paste 5-day, 10-day, and 30-day notice templates with correct statutory language.
Get templates →Illinois Landlord-Tenant FAQ
20 answers covering rent, deposits, eviction, repairs, and tenant rights in Illinois.
Read the FAQ →All State Laws
Landlord-tenant law guides for all 50 states.
Browse states →Compliance Engine
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Check now →Written by Rachid Abadli
Sacramento-based landlord and founder of LeaseBase
This guide covers Illinois landlord-tenant law under 765 ILCS 705–742, the Chicago RLTO, the Cook County RTLO (2021), and related statutory provisions. Sources verified against the Illinois General Assembly website and Chicago Municipal Code on August 4, 2026.
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This guide is for informational purposes only and does not constitute legal advice. Landlord-tenant laws vary by municipality, and Chicago, Cook County, and other Illinois cities impose additional requirements beyond state law. Consult a qualified Illinois real estate attorney for guidance on your specific situation.