A sublease is an agreement where someone takes over part or all of an existing lease. This type of lease involves at least three parties.This group helps to find rooms, roommates and apartments in Chicago, Illinois, USA. Search short term and month to month rentals. A tenant must get the landlord's approval before subleasing their apartment. Com is a website connecting renters with short-term sublets. Landlord's Consent Required. Create your free Texas residential sublease agreement. Download our template and learn how to sublet an apartment in Texas legally. Steve Missirlian is an outstanding agent who helped my wife and I find our apartment and ultimately sublet it after living there for a few years.