@Jennie Berger gave you the whole kit & caboodle on Chicago zoning so I don't have a ton to ad, however, I'd highly encourage you to engage an architect like @Samuel Pavlovcik or @Prashanth Mahakali, both are awesome local Chicago resources.

I am new to Bigger Pockets and looking for opportunities to engage, discuss, and work with others in the field of REI.

Looking forward to engaging with this community and soaking up all the knowledge I can.

Have helped multiple clients maximize their house hacking properties this year as well. 

Engage with them at your own risk. 

Seems to me cohesive set of laws and rules regarding this activity would benefit  both the public and those that want to engage in the activity.  

Send a notice: The landlord can post a notice in a visible place and send a notice by mail to the tenant's last known addressRemove belongings: The landlord can remove the tenant's belongings and store themRecover costs: The landlord can recover the costs of moving and storage from the tenantSell belongings: If the tenant doesn't claim their belongings, the landlord can sell them at a public sale(End)Please only communicate with the tenants - all of them - in written form only so it can be used in any collection/court engagement. 

Pick a posted and engage with them.  

I look forward to engaging with you all, sharing insights, and hopefully contributing to discussions as I progress on my journey. 

I'm sure y'all already knew that!