Keeping the COVID-19 pandemic in mind, the City of Chicago released guidelines for safe outdoor dining this fall and winter.
All outdoor spaces must have a sidewalk cafe permit, outdoor patio license or an expanded outdoor dining permit.
Structures: Temporary outdoor structures, including tents, are allowed on private property or the public way, as long as temporary outdoor structures that hold multiple parties must have at least 50% of the sides open to allow air flow; and that enclosed structures, such as plastic domes, may be used for individual parties and must have adequate ventilation to allow for air circulation.
Heating devices: Natural gas heaters or any devices fueled with propane are only allowed in open, uncovered areas; and heating equipment must be shown on site plans submitted with the permit application.
Safety considerations: Outdoor spaces with heating devices must keep devices away from combustible materials, such as tents, at all times. Also, restaurants will need inclement weather plans in writing and train staff to prevent any injuries in storms, snow or other unsafe situations.
This list only includes some of the requirements. The full document is at https://files.constantcontact.com/fabc28cb001/ccd9f478-58c0-412d-a5fb-db4f3162d628.pdf .