Selling a Home With Radon in Illinois (QET Guide)

Selling your home is already a high-stakes process—adding radon into the mix can feel like one more obstacle. The reality? It’s common, manageable, and doesn’t have to derail your closing. With the right approach and the right team, you can keep your deal on track without unnecessary stress.

What Are You Required to Do in Illinois?

Under the Illinois Radon Awareness Act, sellers must disclose any known information about radon in the property to potential buyers. This is typically done using a standard disclosure form provided during the transaction.

 In the Chicagoland market, it’s now very common for:

 A radon test to be performed early in the process

Mitigation to be addressed if levels come back elevated

This proactive approach helps avoid surprises and keeps deals moving forward.

Is It Hard to Sell a House With Radon?

Not in this area.

 In Northern Illinois, roughly 1 in 3 homes will test at or above recommended radon levels. Because of that, buyers, agents, and attorneys are already familiar with how it’s handled.

The key point:

 Radon is a fixable issue

Mitigation systems are reliable and long-lasting

Most buyers are comfortable moving forward as long as there’s a clear plan—either installation before closing or a credit toward mitigation.

Will Radon Delay Your Closing?

In most cases—no.

 With proper planning, mitigation systems can typically be installed before closing without changing timelines. When schedules are tight, it’s also common to:

 Close on time

Complete mitigation immediately after closing

 The important factor is working with a responsive, experienced team that understands real estate deadlines.

If You’re Offering a Credit — Do It Right

If you plan to credit the buyer for radon mitigation:

 Always base it on a written quote, not a guess

Avoid relying on rough phone estimates

 Typical mitigation costs in Northern Illinois:

 $1,000 – $2,200 (most homes)

Up to $5,000+ in complex situations

A poorly estimated credit can leave buyers short—and create friction late in the deal.

What About System Warranties?

Most professional mitigation systems include warranties, and many are transferable to the new homeowner. This adds peace of mind for buyers and strengthens your position during negotiations.

Why Sellers Choose Quality Environmental Testing (QET)

At Quality Environmental Testing (QET), we focus on the part that matters most during a sale—accurate, professional radon testing that keeps your deal moving.

We work directly with:

 Homeowners

Real estate agents

Attorneys

Buyers

Our process is built for real estate timelines:

Fast scheduling

Professional, calibrated equipment (not DIY kits)

Clear, defensible results for negotiations

Reliable communication with all parties

If mitigation is needed, we help you move forward with mitigation referrals and confidence by ensuring your test results are accurate and trusted.

The Bottom Line

Radon doesn’t kill deals—uncertainty does.

With professional testing and a clear plan, selling a home with radon in the Chicagoland area is routine. The right information, delivered the right way, keeps your closing on track.

Need a fast, professional radon test before your sale?

Contact Quality Environmental Testing (QET) at 708-243-5945 and get results you—and your buyer—can trust.