Radon Mitigation Pros in Cleveland, OH

Finding a qualified radon mitigation contractor in Cleveland shouldn’t feel like a research project — but it does, because Ohio’s certification requirements are looser than you’d expect for a carcinogen that kills 21,000 Americans a year. Northeast Ohio sits squarely in EPA Zone 1, meaning the underlying geology here (glacial till over fractured shale and limestone) pushes radon into basements at rates well above the national average. This directory exists so you can skip the contractor roulette and get to a credentialed pro fast.

How to Choose a Radon Mitigation Contractor in Cleveland

• Verify NRPP or NRSB certification — and check the specific credential type. Measurement and mitigation are separate certifications. The person who tests your home and the person who installs the system should each hold the appropriate credential. Look up any contractor at nrpp.info or nrsb.org before you call.
• Ask whether they pull permits. Cuyahoga County requires a permit for active soil depressurization (ASD) system installations in most jurisdictions. Contractors who skip permits are cutting corners — and you’ll find out the hard way when the system comes up during your next home sale.
• Get a post-mitigation test included in the contract. Any reputable Cleveland contractor will re-test after installation (typically 24–48 hours with a short-term test) and document the pCi/L drop in writing. If they don’t offer this, walk.
• Check their familiarity with Cleveland’s housing stock. A huge share of Cleveland homes were built before 1980 — block foundations, multiple entry points, unusual crawl space configurations. Ask how many sub-slab depressurization systems they’ve installed in older homes specifically. Experience with newer construction doesn’t always translate.
• Get at least two bids. Pricing in the Cleveland market is competitive, and a $400 spread between quotes on the same job is normal. That said, the lowest bid often means a single suction point when your foundation needs two — which means the system underperforms.

Pro Tip: Ohio doesn’t require radon contractors to be licensed at the state level — only certified. That’s a meaningful gap. NRPP and NRSB certification is the floor, not a formality. If a contractor can’t produce their certification number on the spot, that’s your answer.

What to Expect

Testing runs $150–$400 depending on whether you hire a certified measurement professional for a short-term (48-hour) or long-term (90-day) test. If results come back above 4 pCi/L — the EPA action level — mitigation typically costs $800–$1,500 for a standard ASD system install, which most contractors complete in a single day. Complex foundations or multiple entry points push that toward the top of the range.

Reality Check: The “radon test included with mitigation quote” is a common upsell move. Some contractors offer a free or discounted test, then quote mitigation whether you need it or not. If a contractor is doing both your test and your mitigation bid, ask for a copy of the raw lab results — not just their interpretation. Numbers don’t lie; salespeople do.

Local Market Overview

Cleveland’s real estate market moves fast, and radon contingencies are now standard in Cuyahoga County purchase agreements — which means contractors get slammed during spring buying season and turnaround times stretch. If you’re under contract, book your radon inspection the day you go under contract, not when the inspection period starts. The good Cleveland contractors have three-to-five day backlogs in April and May; the ones with next-day availability in peak season are worth a harder look at their credentials.