| Business | Phone |
| Comptroller Ofc 118 N Clark St, Chicago 60602 | (312) 603-5663 |
| Cook Homeowners Exemption Dept 118 N Clark St 301, Chicago 60602 | (312) 443-7550 |
| Cook County Auditor 69 W Washington St, Chicago 60602 | (312) 603-1500 |
| Cook County Revenue Dept 118 N Clark St 1160, Chicago 60602 | (312) 603-3723 |
| Cook County Tax Svc 118 N Clark St, Chicago 60602 | (312) 603-5649 |