Access easy-to-use forms to streamline your tenant screening process. Where do you fill out a renter's application?There are a few ways to fill out a rental application, depending on the landlord or property owner's preference. The Commission's phone number is 312-. 603-1100. Apply for Chicago, IL apartments for rent. Apartments range from studios to 1-3 bedroom apartments for rent. Landlords usually charge an application fee for Chicago apartments. Often the fees are nonrefundable if the landlord agrees to lease the unit to the renter. Clarify private housing applications and lease requirements, and discover safety tips for finding legitimate rentals. Landlords use rental application forms as a tool to assess potential tenants.