Deck Permit in Chicago, Illinois
- Permit Required
- Unknown
- Authority
- City of Chicago
- Maximum Height
- 6 ft
- Last Verified
- 2026-09-29
What the official source says
“A building permit is also not required for the following types of work in a residential building up to 4 stories above grade or an associated accessory building (such as a garage) on the same lot: Repairing or replacing (in-kind) an entire exterior porch, deck, or stair system that is no more than 6 feet above the ground and has a landing area of 50 square feet or less”
chicago.gov
“Repairing or replacing (in-kind) an entire exterior porch, deck, or stair system that is no more than 6 feet above the ground and has a landing area of 50 square feet or less”
chicago.gov
Verify before you build — primary source for this page: https://www.chicago.gov/content/city/en/sites/guide-to-building-permits/home/help/faq/DOB/bldg-permit-not-required/worktype/porch.html
Permit Requirements
Exemptions
Repairing or replacing (in-kind) an entire exterior porch, deck, or stair system that is no more than 6 feet above the ground and has a landing area of 50 square feet or less
Size / Height Limits
Maximum size without a permit: 50 sq ft.
Maximum height without a permit: 6 ft.
How to apply
- Confirm the rules for your address with City of Chicago — the official sources on this page are the place to start.
- Prepare a simple site plan or drawing showing where the deck work goes and its size.
- Submit the application and pay the permit fee.
- Schedule the required inspections and keep the approved permit on site.
More detail: our deck permit guide.
Building Department
City of Chicago
Official Sources
FAQ
Is there a size or height limit before a deck permit is needed in Chicago?
The verified threshold is 6 ft in height and 50 sq ft in area. Exempt: Repairing or replacing (in-kind) an entire exterior porch, deck, or stair system that is no more than 6 feet above the ground and has a landing area of 50 square feet or less
Where do I apply for a deck permit in Chicago?
Applications go to City of Chicago.