One South Dearborn is staffed with professionally trained property management and engineering personnel. We are here to answer any questions you may have about the building or its operation. Please feel free to call or stop by with any comments or concerns that you may have. The Management Office, located on the 7th floor, is open on Monday through Friday from 8:00 a.m. - 5:00 p.m. Please contact Building Security at (312) 386-8316 for any after-hours questions.
Management and Leasing:
Hines
Management Office
1 S. Dearborn St. Suite 700
Chicago IL 60603
Phone: (312) 386-8300
Email: osd@hines.com
Important Numbers:
| Lobby Security Desk | (312) 386-8316 or (312) 386-8326 |
| Messenger Office | (312) 386-8317 |
| Dock Office | (312) 386-8318 |
| Parking Office | (312) 386-8319 |
| Engineering Office | (312) 386-8308 |
Building Service Hours:
| Janitorial Staff | Monday - Friday: 7:00 a.m. - 12:00 a.m. Sunday: 8:00 a.m. - 2:00 p.m. |
| Messenger Center | Monday - Friday: 7:00 a.m. - 6:00 p.m. Saturday & Sunday: Closed |
| Parking Office | Monday - Friday: 6:00 a.m. - 7:00 p.m. Saturday & Sunday: Closed |
| Engineering Office | Monday - Friday: 6:00 a.m. - 10:00 p.m. Saturday & Sunday: 7:00 a.m. - 3:00 p.m. |
| Security Staff | 24/7 |
Hours are subject to change on holidays. Notice will be given prior to any changes.