Simplify your subleasing process with our Chicago Sublease Agreement. Easily edit, fill and sign for free with Lumin.Easily create and download Chicago sublease agreements using DocDraft's legal document templates. Create your Illinois sublease agreement, and sublet your property. Rent your unit to a subtenant with a sublease agreement form. It must clearly state the names of the tenant and subtenant, and describe the condition and address of the rental unit. This resource provides an example of what a sublease in Illinois looks like. Download. Chicago law requires landlords to allow tenants to sublease their apartments if requested. Here's what else you need to know about subleasing in Chicago. A sublease agreement is a rental contract used for rerenting a currently leased unit to a new tenant.