What do I need first? Standard Lease Agreement Documents pertinent information included in a standard oneyear residential rental arrangement.An Illinois lease agreement is a contract that defines the relationship between a property owner and their tenant. Illinois Residential Lease Agreement Template. The Illinois standard residential lease agreement is a contract that creates a legally binding rental arrangement between a landlord and their tenant. Our detailed apartment lease agreement Illinois template ensures all the required information is in the document. Set the terms for renting property. The Illinois lease agreement is the most common type of lease form and can be used for leasing rental property over a fixed period. An Illinois month-to-month rental agreement is a legal contract that authorizes a tenant to rent a property without a fixed end date. An Illinois standard residential lease agreement is a legally binding contract tailored for tenants and landlords in the state.