The Village of Lisle requires a building permit before you can build, replace, or structurally modify a deck. The process is managed by the Development Services Department at Village Hall, and applications are submitted by mail, in person, or hand-delivered.
Village of Lisle Development Services — Contact Information
| Detail | Information |
| Department | Village of Lisle — Development Services |
| Address | 925 Burlington Ave, Lisle, IL 60532 |
| Phone | (630) 271-4150 |
| Permit Line | (630) 271-4104 |
| Fax | (630) 271-4155 |
| Office Hours | Monday–Friday, 8:00 AM–4:30 PM |
| Building Codes | 2015 International Codes (IRC/IBC/IMC/IFGC/IFC) + local amendments; 2024 IECC (eff. Nov 30, 2025) |
When Do You Need a Deck Permit?
- Any elevated deck structure.
- Replacement of structural or safety components — beams, joists, stairs, or railings.
- Any deck with electrical work (lighting, outlets).
Step-by-Step: Applying for a Deck Permit
Step 1 — Call JULIE Before You Dig
Call 811 or visit illinois1call.com to have buried utilities marked. This is free, required by law, and protects you from hitting gas, electric, or water lines when digging footings.
Step 2 — Check Your Setbacks and Lot Coverage
- Setbacks. Decks are prohibited in the front yard, side yard, and corner side yard. Must be in the rear yard, per zoning district setback requirements.
- Lot coverage / impervious surface limits. Under §5-20-1, lot coverage includes all structures and impervious surfaces. A new deck adds to your total. If you’re near the maximum, the deck could push you over — requiring a variance or reduction elsewhere.
Step 3 — Prepare Your Application and Documents
- Completed permit application.
- Plat of survey drawn to scale with proposed deck drawn to scale and dimensions labeled.
- Deck framing sketch showing all framing and pier components with lumber sizing, spacing, and spans.
- Mechanical connection specs — product ID and manufacturer specifications for all hardware.
- PE site plan — required only if altering topography or disturbing 5,000+ sq ft.
Step 4 — Submit Your Application
Applications can be mailed, hand-delivered, or dropped off at Village Hall (925 Burlington Ave). Include the applicable permit fee.
Step 5 — Plan Review
Staff reviews for compliance with building codes and zoning. You’ll be contacted when the permit is ready.
Step 6 — Post Your Permit and Build
Permit placard must be displayed on-site, viewable from public right-of-way, until project completion. Approved plans must be on-site for all inspections.
Inspections
Lisle requests inspections be scheduled 48 hours in advance.
| Inspection | When | What’s Checked |
| Building Rough | Frame complete, before decking — required if underside won’t be accessible after | Footings, post connections, joist spacing, ledger, hardware, lateral connections |
| Building Final | All construction complete | Decking, railings, stairs, electrical, compliance with plans/code |
Impervious Surface and Lot Coverage
Under Lisle Village Code §5-20-1, lot coverage includes all structures and impervious surfaces on your property — house, garage, driveway, patio, walkways, and deck. Each zoning district has a maximum.
- A new deck increases your lot coverage. Even elevated decks count.
- Patios and flatwork also count. If adding both, both contribute.
- Green roof reductions available — equal to the green roof system area.
- Stormwater implications. Lisle is a partial waiver community under DuPage County’s Countywide Stormwater Ordinance. Additional requirements may apply if impervious surface exceeds certain thresholds.
Deck Construction Standards
- Frost depth: 42 inches minimum.
- Structural lumber: Must be pressure-treated or naturally decay-resistant. Other materials require prior approval.
- Fasteners: Hot-dipped galvanized, stainless, silicon bronze, or copper only.
- Guard rails: Required at 30”+ above grade. Min 36” height, max 4” baluster spacing.
- Stairs: Min 36” wide, max 7-3/4” riser, min 10” tread. Handrail at 4+ risers.
- Ledger board: Per IRC R507.9 with min 0.019” flashing. Not on bay windows, doors, or bump-outs.
- Lateral connections: Required at 30”+. Hold-down devices in 4+ locations (min 750 lb each).
- Grading: Ground under deck must slope away from house.
What You Can’t Do
- No decks in front, side, or corner side yards. Rear yard only.
- No construction on easements.
- No exceeding lot coverage. Variance required if over the maximum.
For help choosing materials that meet code and perform well in the DuPage County climate, our comparison of decking materials from a builder’s perspective covers what lasts through Illinois winters. And for the nearby North Aurora area, our guide to the North Aurora deck and patio permit process covers that community’s requirements.
Start Your Lisle Deck Project
Platinum Deck and Patio builds custom decks for Lisle homeowners and handles the full permit process — from plan preparation and lot coverage calculations through submission and all required inspections. Call (224) 634-4345 for a free estimate.