Water Heater 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 need a Water Heater permit in Union
Replacing a water heater (tank or tankless) requires a plumbing permit in Union, IL. Illinois requires an IDPH-licensed plumber under the Illinois Plumbing License Law. Verify with the Village Building Inspector at (815) 923-4153 (available Tuesdays 3 PM to 4 PM) before starting work.
Changing fuel type (gas to electric, electric to heat pump) requires a plumbing permit plus electrical or gas sub-permits in Union, IL under 2021 IRC. Verify with the Village Building Inspector at (815) 923-4153 (available Tuesdays 3 PM to 4 PM) before starting work.
Water Heater Permit Costs: Union vs. Nearby
| City | Estimated Fee |
|---|---|
| Union | N/A |
| Chicago | $100 – $500 |
| Aurora | $25 – $500 |
| Joliet | $25 – $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
Water heater installation is almost never subject to zoning review, it is a plumbing and mechanical code matter. Exterior tankless units on the outside of the house may be subject to minor setback rules in some jurisdictions.
Estimated Project Timeline in Union
Here's a typical timeline for a water heater 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 Water Heater permit fee information. Fees typically vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Water Heater 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 Water Heater permits in Union is about 1 week. More complex projects may take longer if plan review is required.
Learn More About Water Heater Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Water Heater Guide →