About Us
Checkpoint Radon Testing is licensed and insured to provide comprehensive radon testing services in La Grange, IL, and Chicagoland.
Jim Klun
Radon Tech & Home Inspector
IL Inspector License: # 450.012993
Radon License: # RNIT20253213
(^Renewal Date: 10/31/2030)
Our Story
“I started Checkpoint Radon Testing after seeing how often homeowners were confused and anxious about radon results during inspections. Chicagoland families needed accurate measurements—and clear education. We built a service that delivers both.”
— Jim Klun, Owner
Checkpoint Radon Testing is the radon-focused arm of Checkpoint Home Inspections, bringing the same thorough, systematic approach to a single, critical health risk.
Our Qualifications
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Illinois-Licensed Home Inspector with 3 years in residential and commercial evaluations
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NRPP radon measurement training plus InterNACHI prep coursework
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Specialized radon training completed in 2025
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Professional liability insurance specific to radon testing
What Makes Us Different
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Testing-Only, No Conflicts: We do not perform mitigation—our recommendations are objective.
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Home-Systems Insight: We understand how foundation types, HVAC, and building assemblies influence radon movement.
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Direct Testing, Direct Answers: We don’t subcontract. You get professional interpretation, not just forwarded data.
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Education-First: Every client gets an explanation of results, EPA levels, and tailored next steps.
Our Standards, Ethics & Certifications
At Checkpoint Radon Testing, we hold ourselves to the highest professional standards to ensure every test is accurate, ethical, and reliable. Our work follows ANSI/AARST protocols, EPA guidelines, NRPP standards, and Illinois state regulations, giving clients confidence that results are valid and defensible. As an NRPP-trained and Illinois-licensed inspector, owner Jim Klun brings a strong background in residential and commercial property evaluation along with specialized radon measurement training.
All of our equipment is annually calibrated at NRPP-approved facilities and monitored for consistent performance, ensuring precise data collection. Just as importantly, we operate with complete transparency, by providing objective testing, so you can receive accurate and unbiased information you can trust to make informed decisions. Contact us, today!
Choose a Professionaly Qualifed Inspector
Certified Expertise
Accurate Testing
Proven Reliability
Trusted Results
Clear Guidance
Local Specialist
Quick Turnaround
Detailed Analysis
Objective Reporting
Customer Focused
What Others Have To Say...
"Working with Checkpoint brought our home buying experience to the next level. Jim was so incredibly thorough with all of his work. We felt 100 percent confident of the areas of our house that needed attention and the ones that were good to go. Very honest, very accurate and thorough. Would 10/10 recommend."
Andy M.
Google Review
"Jim Klun from Checkpoint Inspection has been an invaluable asset in ensuring the integrity of my inspections. His professionalism, attention to detail, and thoroughness in inspections have consistently impressed me. Jim's expertise instills confidence, and his dedication to providing comprehensive reports promptly is commendable. I highly recommend Jim Klum for anyone in need of a dependable inspector who goes above and beyond to deliver exceptional service."
Henry S.
Google Review
"Jim is such a great inspector, he helped me out so much on my first time house. Very grateful to have found him!!!"
Matthew S.
Google Review
"Jim was prompt, friendly, and helpful explaining the process along the way."
Kevin L.
Google Review
"Jim is a great home inspector! Very professional and terrific customer service. I highly recommend!"
David A.
Google Review
Contact Us
Checkpoint Radon Testing provides licensed, certified, and professional radon testing in the following areas throughout Illinois:
La Grange, Naperville, Orland Park, Hinsdale, Western Springs, La Grange Highlands, La Grange Park, Brookfield, Riverside, Oak Brook, Oak Brook Terrace, Clarendon Hills, Downers Grove, Westmont, Darien, Burr Ridge, Palos Hills, Tinley Park, Indian Head Park, Lisle, and Lombard
Have more questions?
Feel free to call, email, or reach out through the contact form with questions, or to schedule a radon test. We look forward to getting the opportunity to work with you.
Phone: (708) 567-3512
Email: jim@checkpointradon.com
Phone
Checkpoint Radon Testing
La Grange Park - Chicagoland - Illinois
Jim Klun - Radon Specialist & Home Inspector
IL Inspector License # 450.012993
Radon License # RNIT20253213
(^Renewal Date: 10/31/2030)
