Siding Permit Requirements in Union, IL
Village of Union handles its own building permits (McHenry County only covers unincorporated areas, not incorporated villages). Building Inspector is available one hour per week, Tuesdays 3 PM to 4 PM. The village has not published its adopted residential code edition online; rules below use IRC 2021 as baseline (the most common adoption in the Chicago metro). No published fee schedule, no online application portal. Apply in person during Village Hall hours or email permits@unionillinois.org. Illinois state plumbing code (IDPH-licensed plumbers) and electrical licensing requirements apply regardless of local code adoption.
By Joey, Founder · Last verified April 18, 2026 · How we research →
When you don’t need a Siding permit in Union
Repairing or replacing siding on an existing wall with the same or similar material does not require a building permit in Union, IL under 2021 IRC R105.2. Verify with the Village Building Inspector at (815) 923-4153 (available Tuesdays 3 PM to 4 PM) before starting work.
When you need a Siding permit in Union
Full siding replacement on the entire dwelling requires a building permit in Union, IL because of weather barrier and energy code (water-resistive barrier, flashing, insulation) requirements under 2021 IRC R703 and IECC. Verify with the Village Building Inspector at (815) 923-4153 (available Tuesdays 3 PM to 4 PM) before starting work.
Siding Permit Costs: Union vs. Nearby
| City | Estimated Fee |
|---|---|
| Union | N/A |
| Chicago | $100 – $800 |
| Aurora | $100 – $800 |
| Joliet | $100 – $800 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation. See all Union permit costs →
Zoning Considerations
Siding replacement rarely triggers zoning review outside historic districts. Historic districts (Charleston, Savannah, Boston, Santa Fe, and many others) have strict material and color requirements. Hurricane-prone coastal areas may require wind-rated cladding with product approval.
Estimated Project Timeline in Union
Here's a typical timeline for a siding project in Union, IL:
Timeline is based on Union's typical about 2 weeks permit processing time. Actual timelines vary by project complexity, completeness of application, and current department workload.
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Frequently Asked Questions
Contact Union's building department for current Siding permit fee information. Fees typically vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Siding projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in Union can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for Siding permits in Union is about 2 weeks. More complex projects may take longer if plan review is required.
Learn More About Siding Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Siding Guide →