Retaining Walls: Downers Grove vs Naperville
How do retaining walls rules compare between Downers Grove, IL and Naperville, IL?
Downers Grove, IL
DuPage County
No data available yet for Downers Grove.
Naperville, IL
DuPage County
Naperville requires permits for retaining walls as part of its building code under Title 5. Walls must comply with grading and drainage requirements. Engineered walls may be required for taller structures. Walls cannot interfere with stormwater management.
View full Naperville rules →Key Facts Comparison
| Fact | Downers Grove | Naperville |
|---|---|---|
| Permit | - | Required |
| Engineering | - | May be required |
| JULIE | - | Call before digging |
| Drainage | - | Must not interfere |
Highlighted rows indicate differences between cities.
Downers Grove FAQ
No FAQs available.
Naperville FAQ
Do I need a permit for a retaining wall in Naperville?
Yes. Building permits are required for retaining walls. Taller walls may need engineering certification. Call JULIE at 1-800-892-0123 before digging.
Can a retaining wall affect drainage?
Yes, and it must not. Retaining walls must not interfere with established drainage patterns or stormwater infrastructure. The permit review addresses drainage impact.
Compare other topics
See how Downers Grove and Naperville compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool