Patio 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 Patio permit in Union
A ground-level patio of pavers, brick, or stone laid on grade does not require a building permit in Union, IL under 2021 IRC R105.2 (sidewalks and decks not exceeding 30 inches above grade). Verify with the Village Building Inspector at (815) 923-4153 (available Tuesdays 3 PM to 4 PM) before starting work.
A residential concrete slab patio at grade typically 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 Patio permit in Union
Covered patios (with a roof, pergola attached to the dwelling, or solid cover) require a building permit in Union, IL under 2021 IRC R105.1 because of the structural roof load. Verify with the Village Building Inspector at (815) 923-4153 (available Tuesdays 3 PM to 4 PM) before starting work.
Patio Permit Costs: Union vs. Nearby
| City | Estimated Fee |
|---|---|
| Union | N/A |
| Chicago | $100 – $500 |
| Aurora | $100 – $500 |
| Joliet | $100 – $500 |
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
Patios contribute to impervious surface coverage on your lot. Many cities cap total impervious coverage at 40–60% of lot area. Check with your planning department before adding large hardscape areas.
Estimated Project Timeline in Union
Here's a typical timeline for a patio 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.
Need a Patio permit in Union, IL?
Answer a few quick questions for a personalized answer about your specific project.
Check Now, Free →Building Department Contact
Frequently Asked Questions
Contact Union's building department for current Patio permit fee information. Fees typically vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Patio 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 Patio permits in Union is about 2 weeks. More complex projects may take longer if plan review is required.
Learn More About Patio Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Patio Guide →