Notice of Non-renewal Question

[Kristen R.]

I live in Chicago and I rent out my second bedroom. So this is an owner-occupied unit. I do not want to renew the lease with this individual. My question is, what do I need to do to notify them of this decision? Can I have an in person conversation, should I write an email, or does it need to be a written letter? Also, does anyone know what verbiage I should use? -Thank you