Preview 192,160 permits — every permit Chicago, Austin and Seattle issued in the last ten years. The full load is in progress, so this is how far it has got. Sourced from city open-data portals. Data as of 2026-09-20.

Chicago · permit 100770179

401 N MICHIGAN AVE

INTERIOR ALTERATIONS TO 3OTH AND 31ST FLOORS AND PARTIAL 29TH FLOOR TO INCLUDE ELECTRICAL, MECHANICAL AND PLUMBING IN AN EXISTING OFFICE SPACE AS PER PLAN . STRUCTURAL PEER REVIEW

Permit

Permit type
PERMIT - RENOVATION/ALTERATION
Class
Unknown
Trade
Electrical
Nature of work
Alteration
Status
COMPLETE

Location

City
Chicago
State
IL

Dates

Applied
2018-07-19
Issued
2018-09-27
Time to issue
70 days

Chicago details

Review type
STANDARD PLAN REVIEW
Milestone
COMPLETE
Community area (code)
8

Data as of 2026-09-20.

Other permits issued in Chicago, September 2018