Michigan - Ohio Building
600 N Michigan Ave · Chicago, IL, 60611
Active express permit program · 3 permits
ACTIVE
PERMIT SET
EXPRESS PERMIT PROGRAMMECHANICAL
Largest permit
$2.66M
Window
Jul 14, 2026 – Sep 2, 2026
Permits
3
Parties
22
Largest single reported permit cost — not a summed project total. Individual permit values can overlap in scope.
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Activity
How much relevant permit activity is on this site.
82
/ 100
High
Why this score:
Recent permit activity
Related permit history
Major construction activity
Active permits on site
Multiple trades involved
Significant reported costs
Trade fit
How well this project matches each trade, from linked permits. Select a trade to filter parties & permits.
| Trade | Fit | Evidence |
|---|---|---|
| High | Major construction permits | |
| Medium | Major construction permits |
Permit ledger
All 3 permits on this record| Permit | Description | Status | Contractor | ||
|---|---|---|---|---|---|
B200509338 Mechanical Work | REPAIR/REPLACEMENT AFFECTING 1 SYSTEMS : 2 SPLIT DX UNIT(LG, ZRUM264DTE6, ROOFTOP) . ELECTRICAL WORK UNDER THIS PERMIT = YES . LOCATIONS: 0 RESIDENTIAL UNIT(S), 1 NON-RESIDENTIAL UNIT(S), EXTERIOR WORK, 3RD FLOOR ROOF AND AIR HANDLER MECHANICAL ROOM 1ST. | AUG 27, 2026 | Active | $360,000 | Midwest Mechanical Group Inc |
101082930 Renovation | Structural permit revision for digital cube support, storefront framing, entry vestibule work with concrete curb, revised stair attachments, and an added 2nd-floor door, with no change in use. | JUL 9, 2026 | Active | $2,655,650 | Gray West Construction Inc |
101085483 Renovation | SELF-CERT 2019 CBRC: INTERIOR DEMOLITION TO EXISTING 1ST FLOOR NORTH TENANT SPACE AD PARTIAL DEMOLITION OF THE ADJACENT TENANT SPACE. WORK TO INCLUDE THE CONSTRUCTION OF A NEW DEMISING WALL TO CREATE NEW LEASE SPACE AND REMOVAL OF A 2ND FLOOR INFILL AT THE CIRCULAR ENTRANCE. (EXISTING/PROPOSED USE: M; EXISTING/PROPOSED CONSTRUCTION TYPE: IB) | JUL 1, 2026 | Active | $800,000 | Midwest Construction Partners |
Permit values are as reported at filing and may be revised on amendment. Individual permits can overlap in physical scope.
Why this project matters
COST
$2.66M largest permit, express permit program
Max reported cost; not a summed project total
ACTIVITY
3 permits in the last 90 days
3 major construction permits on this site
CONTRACTOR
Gray West Construction Inc is the linked general contractor
Named on linked permits for this site
SCOPE
Construction spanning 3 floors
Floor references found in permit descriptions
TRADES
General Construction and Mechanical opportunity on site
Key parties
General Contractor
Gray West Construction Inc(714) 491-1317
Electrical
G & M Electrical Contractors(773) 278-8200
Mechanical
Quality Mechanical Inc(708) 887-7036
Plumbing
Prospective Plumbing Corp(773) 965-1902
Owner
Clpf-600 Nma LpNo contact on file
Architect
Gary Warren RNo contact on file
16 more parties on this project
Location
1 site · Chicago
Sources: City of Chicago Dept. of Buildings permit feed · Cook County Assessor parcel records
Source Chicago Building Permits · Last calculated Sep 8, 2026