Retaining walls may be permitted in front, side, and rear setbacks, so long as they are located at least three (3) feet within the lot lines and do not obstruct storm water flow. Retaining walls shall be limited to a maximum three (3) feet in height. When the consequence of grading land results in the necessity for a total retaining wall height greater than three (3) feet, the retaining wall must be tiered and each wall on the tiered retaining wall system shall be limited to three (3) feet in height. The formula for determining the tiered wall setback shall be two (2) times the lower wall height. A structural permit is required if the retaining wall system exceeds three (3) feet (triggering the need for a second wall or more) in total height.
Required at the time of application for a permit:
- Completed permit application
- Drawing sealed by a structural engineer if wall exceeds two feet.
Permit fee is $60. Permit will be reviewed by Engineering.
Village of Orland Park Land Development Code, Article 6
, Part 3, Section 6-302, Item 29