What are essential services?
Heat, running water, hot water, electricity, gas,and plumbing.

Who is responsible for paying for these services?
That depends upon the terms of your lease agreement.

What if I'm responsible for the cost of heating my apartment?
Your landlord must give you a written statement setting forth the projected average monthly cost of heating your unit. (Your landlord must do this even if your tenancy is not governed by Chicago's Residential Landlord and Tenant Ordinance).