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.This group helps to find rooms, roommates and apartments in Chicago, Illinois, USA. We created this community to make the process of finding a new home, tenant, or roommate, just that bit easier. Search short term and month to month rentals. In Illinois, tenants usually need a landlord's consent to sublease their apartment. The Chicago Residential Landlord and Tenant Ordinance (CRLTO) provides the foundation for subleasing agreements in the city. Search short term and month to month rentals. I'm looking to find a sublease soon at presidential towers and was wondering what you needed to do to fill out an application. I found a great apartment in Lakeview and the current tenant and I drew up a contract with a lawyer, without involving her landlord.