Deck Permit in Johnson County, Kansas
- Permit Required
- Depends
- Authority
- Johnson County
- Last Verified
- 2026-09-29
What the official source says
“Decks not exceeding 200 square feet (18.58 m2) in area, that are not more than 30 inches (762 mm) above grade at any point, are not attached to a dwelling and do not serve the exit door required by Section R311.4.”
jocogov.org
Verify before you build — primary source for this page: https://www.jocogov.org/sites/default/files/files/2021-10/Permit%20Exemptions.pdf
Permit Requirements
Exemptions
Decks not exceeding 200 square feet (18.58 m2) in area, that are not more than 30 inches (762 mm) above grade at any point, are not attached to a dwelling and do not serve the exit door required by Section R311.4.
Size / Height Limits
Maximum size without a permit: 200 sq ft.
How to apply
- Confirm the rules for your address with Johnson County — 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
Johnson County
Official Sources
FAQ
Do I need a deck permit in Johnson County, Kansas?
It depends on the project. The official source says: “Decks not exceeding 200 square feet (18.58 m2) in area, that are not more than 30 inches (762 mm) above grade at any point, are not attached to a dwelling and do not serve the exit door required by Section R311.4.”
Is there a size or height limit before a deck permit is needed in Johnson County?
The verified threshold is 200 sq ft in area. Exempt: Decks not exceeding 200 square feet (18.58 m2) in area, that are not more than 30 inches (762 mm) above grade at any point, are not attached to a dwelling and do not serve the exit door required by Section R311.4.
Where do I apply for a deck permit in Johnson County?
Applications go to Johnson County.