Updated 2026-10-01
Radon Guides
Straight answers to the questions people actually ask about radon, testing, Illinois law, and what things cost. No email required, and every fact here traces to a named, dated source at the bottom of its page.
Short-Term vs. Long-Term Radon Testing: Which One Do You Need?
The real difference between a short-term and long-term radon test, and which one fits a home sale, a new house, or just wanting to know.
Read the guideIs Radon Testing Required to Sell a Home in Illinois?
What Illinois law actually requires for radon on a home sale: the Radon Awareness Act, the disclosure rule, and what's just common practice.
Read the guideRadon Fan Replacement Cost: What to Expect
What it costs to replace a failed radon mitigation fan, the signs a fan has quit, and why confirmation testing afterward is the step that proves it worked.
Read the guideHow to Verify a Radon Tester's Illinois License
Illinois requires an IEMA license to measure or mitigate radon. How the license works and the free public lookup to check one before you book.
Read the guideDoes Illinois Require Radon-Resistant New Construction?
Illinois's 2013 Radon Resistant Construction Act and what it actually requires of new homes, plus why a passive system still needs to be tested.
Read the guideDIY Radon Test Kit vs. Professional Testing: What's the Difference?
When a retail radon test kit is good enough, and when the situation calls for an IEMA-licensed professional instead.
Read the guideReady to know your number?
Tell us why you're testing and any deadline you're working against. You get a fixed price and a straight answer back.