Retaining Walls: Oak Lawn vs Orland Park
How do retaining walls rules compare between Oak Lawn, IL and Orland Park, IL?
Oak Lawn and Orland Park have similar restriction levels.
Oak Lawn, IL
Cook County
Oak Lawn requires a building permit for retaining walls over 4 feet in height measured from the bottom of the footing to the top of the wall, or for any wall supporting a surcharge. Engineered drawings stamped by a licensed Illinois structural engineer are required.
View full Oak Lawn rules →Orland Park, IL
Cook County
Orland Park requires a building permit for retaining walls over 4 feet in height (measured from base footing). Walls over 4 feet require engineered drawings stamped by a licensed Illinois structural engineer.
View full Orland Park rules →Key Facts Comparison
| Fact | Oak Lawn | Orland Park |
|---|---|---|
| Permit Threshold | Over 4 feet or with surcharge | Most walls require permit |
| Engineering | Licensed IL engineer required | - |
| Drainage | Weep holes/drain tile | - |
| JULIE Locate | Required before digging | Required (call 811) |
| Contact | Building (708) 499-7830 | Building (708) 403-6200 |
| Engineering Required | - | Walls over 4 ft or w/ surcharge |
| Guard Rail | - | Often required if 30+ in drop |
Highlighted rows indicate differences between cities.
Oak Lawn FAQ
Do I need a permit for a small retaining wall in Oak Lawn?
Walls under 4 feet with no surcharge generally do not need a permit, but any wall holding back a slope, driveway, or other load requires a permit regardless of height.
Do I need an engineer for my retaining wall?
Yes for any wall over 4 feet or supporting a surcharge. The plans must be stamped by a licensed Illinois structural engineer.
What drainage is required?
Retaining walls must include weep holes or perforated drain tile behind the wall with approved granular backfill to prevent hydrostatic pressure buildup and wall failure.
Orland Park FAQ
Do I need a permit for a retaining wall in Orland Park?
Yes for most walls. Walls over 4 feet or supporting a slope/structure require engineered plans and a full permit.
Who can design a tall retaining wall in Orland Park?
Walls over 4 feet or with surcharge require drawings stamped by a licensed Illinois structural or professional engineer.
Do I need a railing on top of my retaining wall?
If the drop on the high side exceeds 30 inches and the wall is in a walking area, a guard rail is typically required by the building code.
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