Below, you can download a free Illinois sublease agreement template to start creating your contract. The subtenant agrees to assume all of the obligations and responsibilities of the sublessor under the original lease for the duration of the sublease agreement.An Illinois sublease agreement is a contract in which an existing tenant (sub-lessor) and a third-party (the sub-lessee) establish a rental arrangement. This resource provides an example of what a sublease in Illinois looks like. Download. 1. The sublessee shall be liable for the full rent of the sublessor in the amount of. Illinois Sublease Agreement is a document between a tenant and a subtenant whom agrees to rent the same property. A sublease agreement is a form that allows a tenant to rent space they have under a written contract with a landlord to someone else. Create a sublease agreement to legally sublet your property. Our sublease contract template allows a tenant to rent a unit to a subtenant. Unless otherwise instructed, you may want to cover many of the items listed in this Sample Sublet Agreement (Word doc).