What must a Illinois residential lease include?
A Illinois residential lease should include the names of the landlord and every tenant, the property address, the rent amount and due day, the lease term and start and end dates, the security deposit amount (up to no statewide cap; Chicago RLTO has separate requirements), state-mandated disclosures (federal lead paint disclosure for pre-1978 units, plus any Illinois-specific disclosures), and signature lines. Illinois landlord-tenant law applies several mandatory terms even if the lease is silent. A Illinois-specific lease template applies the correct clauses automatically. LeaseKit builds these from the relevant statutes.
Source: Illinois landlord-tenant code
This is an informational answer based on Illinois landlord-tenant code as of early 2026. It is not legal advice. Housing law changes year to year and local ordinances (especially in rent-controlled or rent-stabilized cities) can override or add to state law. For contested cases, consult a Illinois-licensed attorney.