What disclosures are required in a Illinois lease?

Lead-based paint disclosure (federal law — required for any housing built before 1978). Radon disclosure — the IEMA "Radon Guide for Tenants" pamphlet, the radon disclosure form, and any records showing a radon hazard; the tenant has 90 days to test (420 ILCS 46). Carbon monoxide and smoke alarms installed and maintained (430 ILCS 135). Shared-utility cost allocation, if utilities are master-metered or shared between units. Chicago units (RLTO): attach the city's RLTO summary; the Chicago ordinance adds stricter deposit-return, deposit-interest, and notice rules. Confirm current requirements with Illinois's landlord-tenant law.

How much can a landlord charge for a security deposit in Illinois?

No statewide cap; local ordinances may add rules. The deposit must be returned within: Within 45 days statewide, with an itemized statement of any deductions within 30 days; the Security Deposit Return Act applies to properties with 5+ units (765 ILCS 710). Chicago (RLTO): 21 days regardless of unit count, plus annual deposit interest held in a designated Illinois account.

How much notice to end a month-to-month lease in Illinois?

30 days' written notice before the next rental period statewide (735 ILCS 5/9-207). Chicago (RLTO) uses a tiered schedule for non-renewal or rent increase: 30 days (under 6 months), 60 days (6 months–3 years), 120 days (over 3 years).

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Illinois Residential Lease Agreement

Create a residential lease built for Illinois, including the disclosures the state requires. Fixed-term or month-to-month, free PDF download, no signup.

Verified against Illinois statute · 2026-06-10

Illinois lease rules at a glance

Security deposit limit: No statewide cap; local ordinances may add rules.
Deposit return window: Within 45 days statewide, with an itemized statement of any deductions within 30 days; the Security Deposit Return Act applies to properties with 5+ units (765 ILCS 710). Chicago (RLTO): 21 days regardless of unit count, plus annual deposit interest held in a designated Illinois account.
Notice (month-to-month): 30 days' written notice before the next rental period statewide (735 ILCS 5/9-207). Chicago (RLTO) uses a tiered schedule for non-renewal or rent increase: 30 days (under 6 months), 60 days (6 months–3 years), 120 days (over 3 years).
Rent control: Rent control is prohibited statewide — no local government, including Chicago, may enact it (Rent Control Preemption Act, 50 ILCS 825).

Required disclosures in Illinois

Lead-based paint disclosure (federal law — required for any housing built before 1978).
Radon disclosure — the IEMA "Radon Guide for Tenants" pamphlet, the radon disclosure form, and any records showing a radon hazard; the tenant has 90 days to test (420 ILCS 46).
Carbon monoxide and smoke alarms installed and maintained (430 ILCS 135).
Shared-utility cost allocation, if utilities are master-metered or shared between units.
Chicago units (RLTO): attach the city's RLTO summary; the Chicago ordinance adds stricter deposit-return, deposit-interest, and notice rules.

State

Lease type

Landlord name

Landlord address (optional)

Tenant name(s)

Property address

Start date

End date

Monthly rent

Rent due day

Security deposit

Late fee (optional)

Utilities (who pays)

Pets allowed

Illinois required disclosures

Lead-based paint disclosure (federal law — required for any housing built before 1978).
Radon disclosure — the IEMA "Radon Guide for Tenants" pamphlet, the radon disclosure form, and any records showing a radon hazard; the tenant has 90 days to test (420 ILCS 46).
Carbon monoxide and smoke alarms installed and maintained (430 ILCS 135).
Shared-utility cost allocation, if utilities are master-metered or shared between units.
Chicago units (RLTO): attach the city's RLTO summary; the Chicago ordinance adds stricter deposit-return, deposit-interest, and notice rules.

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Starting template, not legal advice. Lease law varies by state and changes — have an attorney review before you sign.

Frequently Asked Questions

What disclosures are required in a Illinois lease?: Lead-based paint disclosure (federal law — required for any housing built before 1978). Radon disclosure — the IEMA "Radon Guide for Tenants" pamphlet, the radon disclosure form, and any records showing a radon hazard; the tenant has 90 days to test (420 ILCS 46). Carbon monoxide and smoke alarms installed and maintained (430 ILCS 135). Shared-utility cost allocation, if utilities are master-metered or shared between units. Chicago units (RLTO): attach the city's RLTO summary; the Chicago ordinance adds stricter deposit-return, deposit-interest, and notice rules. Confirm current requirements with Illinois's landlord-tenant law.
How much can a landlord charge for a security deposit in Illinois?: No statewide cap; local ordinances may add rules. The deposit must be returned within: Within 45 days statewide, with an itemized statement of any deductions within 30 days; the Security Deposit Return Act applies to properties with 5+ units (765 ILCS 710). Chicago (RLTO): 21 days regardless of unit count, plus annual deposit interest held in a designated Illinois account.
How much notice to end a month-to-month lease in Illinois?: 30 days' written notice before the next rental period statewide (735 ILCS 5/9-207). Chicago (RLTO) uses a tiered schedule for non-renewal or rent increase: 30 days (under 6 months), 60 days (6 months–3 years), 120 days (over 3 years).

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This template is a starting point for residential leases in Illinois, USA. It is not legal advice. Lease law varies by state and changes — confirm requirements with Illinois and have an attorney review it before signing.