Preview 316,582 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 100721839

646 N MICHIGAN AVE

INTERIOR & EXTERIOR ALTERATIONS (GROUND THROUGH 5TH FLOOR) FOR SHELL & CORE ONLY TO INCLUDE NEW ROOF DECK OF AN EXISTING FIVE (5) STORY MERCANTILE BUILDING AS PER PLANS. (STRUCTURAL PEER REVIEW) (CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTIONS)

Permit

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

Location

City
Chicago
State
IL

Dates

Applied
2017-12-14
Issued
2018-01-10
Time to issue
27 days

Chicago details

Review type
STANDARD PLAN REVIEW
Milestone
CERTIFICATE OF OCCUPANCY ISSUED
Community area (code)
8

Data as of 2026-09-20.

Other permits issued in Chicago, January 2018