Maximum Capacity Sign: Chicago restaurant guide

Chicago Department of Buildings

What it is

Rooms where more than 100 people gather, including restaurants and bars, must post a city-issued maximum capacity sign at the main entrance.

When a restaurant needs it

Occupant load over 100, or when your business or liquor license requires it for a smaller venue.

How to apply

Email DOB for current application instructions (walk-in help is not available).

Documents you’ll need

Floor plan with occupant load calculation
Building permit info

Fee

Varies

Processing time

Varies

Renewal

Re-issue if the layout or occupancy changes

Who files

The owner/operator or their architect applies.

Good to know

Fire inspectors check for the posted occupancy card during liquor and amusement inspections.

Official source

DOB — Maximum Capacity Signs

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Last reviewed 2026-10-06. Guidance only, not legal advice.