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Avatar for Square One Radon LLC

Square One Radon LLC

5.00(
1
)
Approved Pro

Square One Radon LLC

5.00(
1
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
15 local quotes requested

Fully certified and locally owned, Square One Radon offers full service radon testing, radon mitigation, crawlspace encapsulation, and new construction radon services. Square One stands apart from the competition by utilizing the most scientific and calculated approaches to providing radon testing and mitigation solutions. Precise measurements to determine and document air flow, air pressure, pressure field extension, and more are routine practice at Square One. Unfortunately, many radon companies do not invest in the tools, training and techniques required to provide the most effective and efficient solutions to radon problems. Square One Radon was founded with the ideal of offering some of the most advanced, reliable, and proven testing and mitigation technologies in an affordable and practical solution for homeowners, businesses, schools, and other clients. Rob Hartop, Owner and Founder, brings eight years of experience in the radon industry to the Western Slope of Colorado along with his NRPP certifications in both radon testing and radon mitigation. Rob is also a member of the American Association of Radon Scientists and Technologists (AARST), spent over 12 years working in customer relations, has over four years experience in automotive and industrial fluid line fabrication, and holds a Bachelor of Business Adminnistration with concentrations in finance and economics.

"Square One Radon was professional, knowledgeable, reasonably priced, prompt, and did a beautiful job. The company's owner, Rob is the best. I would recommend his company enthusiastically and without any reservations. I'm a retired consumer-protection lawyer, so I know an outstanding company when I see one."

Pat T on January 2023

Fully certified and locally owned, Square One Radon offers full service radon testing, radon mitigation, crawlspace encapsulation, and new construction radon services. Square One stands apart from the competition by utilizing the most scientific and calculated approaches to providing radon testing and mitigation solutions. Precise measurements to determine and document air flow, air pressure, pressure field extension, and more are routine practice at Square One. Unfortunately, many radon companies do not invest in the tools, training and techniques required to provide the most effective and efficient solutions to radon problems. Square One Radon was founded with the ideal of offering some of the most advanced, reliable, and proven testing and mitigation technologies in an affordable and practical solution for homeowners, businesses, schools, and other clients. Rob Hartop, Owner and Founder, brings eight years of experience in the radon industry to the Western Slope of Colorado along with his NRPP certifications in both radon testing and radon mitigation. Rob is also a member of the American Association of Radon Scientists and Technologists (AARST), spent over 12 years working in customer relations, has over four years experience in automotive and industrial fluid line fabrication, and holds a Bachelor of Business Adminnistration with concentrations in finance and economics.

"Square One Radon was professional, knowledgeable, reasonably priced, prompt, and did a beautiful job. The company's owner, Rob is the best. I would recommend his company enthusiastically and without any reservations. I'm a retired consumer-protection lawyer, so I know an outstanding company when I see one."

Pat T on January 2023


Avatar for Square One Radon, LLC

Square One Radon, LLC

5.00(
40
)
Approved Pro

Square One Radon, LLC

5.00(
40
)
Approved Pro
Super Service Award
Customers say: Quick response
5 years of experience
Free onsite estimate

Square One Radon is the premier choice for radon measurement and mitigation on all projects small and large, old and new. Owner and founder, Rob Hartop, brings over 12 years of radon industry experience along with a multitude of credentials including NRPP specialty certifications for new construction, multifamily, and advanced mitigation techniques. We are licensed in the State of Colorado, and are fully insured, certified, and bonded. We can mitigate any home or building, and will give you a free quote right away. Ask about our industry-leading guarantee!

"The Square One Radon team was fantastic. I had been putting this off for a while, but am so happy to have it done. Peace of mind. The team was very professional, friendly, and easy to work with. Highly recommend!"

Matthew U on November 2025

Square One Radon is the premier choice for radon measurement and mitigation on all projects small and large, old and new. Owner and founder, Rob Hartop, brings over 12 years of radon industry experience along with a multitude of credentials including NRPP specialty certifications for new construction, multifamily, and advanced mitigation techniques. We are licensed in the State of Colorado, and are fully insured, certified, and bonded. We can mitigate any home or building, and will give you a free quote right away. Ask about our industry-leading guarantee!

"The Square One Radon team was fantastic. I had been putting this off for a while, but am so happy to have it done. Peace of mind. The team was very professional, friendly, and easy to work with. Highly recommend!"

Matthew U on November 2025


Avatar for Stanton Engineering Solutions Inc.

Stanton Engineering Solutions Inc.

New on AngiNew on Angi
Approved Pro

Stanton Engineering Solutions Inc.

New on AngiNew on Angi
Approved Pro
15 local quotes requested
20 years of experience

Stanton Engineering Solutions, Inc. is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

Stanton Engineering Solutions, Inc. is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.


Avatar for All Colorado Radon Mitigation Inc

All Colorado Radon Mitigation Inc

4.97(
38
)
Approved Pro

All Colorado Radon Mitigation Inc

4.97(
38
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
28 local quotes requested

Family owned and operated Radon Mitigation Company. We design and install custom mitigation systems to fit your house. Guaranteed to reduce radon levels to an acceptable level while being aesthetically pleasing to the eye. No obligation site visits and estimates. Check, CC's and Financing available upon request.

"All Colorado Radon Mitigation, Inc. is an incredible company to work with. They perform quality work, and they are truly friendly and professional. The system that they installed was straightforward, but the work was top-notch. Highly recommend!"

Seth N on July 2024

Family owned and operated Radon Mitigation Company. We design and install custom mitigation systems to fit your house. Guaranteed to reduce radon levels to an acceptable level while being aesthetically pleasing to the eye. No obligation site visits and estimates. Check, CC's and Financing available upon request.

"All Colorado Radon Mitigation, Inc. is an incredible company to work with. They perform quality work, and they are truly friendly and professional. The system that they installed was straightforward, but the work was top-notch. Highly recommend!"

Seth N on July 2024



Rocky Mountain Radon Mitigation

No reviews yet

Rocky Mountain Radon Mitigation

No reviews yet

Rocky Mountain Radon Mitigation LLC is a locally owned & operated company servicing all four corners of Colorado. We are NRPP certified in radon testing and mitigation. We are committed to increasing awareness of radon and its health risks, as well educating our customers on the appropriate methods to reduce risk in their homes, schools, or businesses.

Rocky Mountain Radon Mitigation LLC is a locally owned & operated company servicing all four corners of Colorado. We are NRPP certified in radon testing and mitigation. We are committed to increasing awareness of radon and its health risks, as well educating our customers on the appropriate methods to reduce risk in their homes, schools, or businesses.



AAA NOVA commercial and residential inspections

No reviews yet

AAA NOVA commercial and residential inspections

No reviews yet

We service the Colorado front range area for commercial and residential inspections, family owned, licensed and insured. To real estate transactions to one year homeowners inspections, we do it all. Over 20 years of experience in commercial and residential building, maintaining and inspections. All reports are given via email. We provide radon, video sewer scope, thermal imaging, ect. Give us a call to learn more about AAANova and for a quote!

We service the Colorado front range area for commercial and residential inspections, family owned, licensed and insured. To real estate transactions to one year homeowners inspections, we do it all. Over 20 years of experience in commercial and residential building, maintaining and inspections. All reports are given via email. We provide radon, video sewer scope, thermal imaging, ect. Give us a call to learn more about AAANova and for a quote!


Certified Professionals with over 23 years experience. We specialize in the mitigation and environmental clean up of water, flood, mold, and much more. Family owned and operated.


Advanced Remediation Services

No reviews yet

Advanced Remediation Services

No reviews yet
10 years of experience

Advanced Remediation Services, Inc. (ARS Colorado) is a fully licensed and bonded Asbestos Removal, Lead Abatement, Mold Abatement, and Demolition Contractor. ARS Colorado prides itself on attention to detail, exceptional workmanship, and completing projects in a safe and timely manner. The owner of ARS Colorado has many years working with Federal contracts, School districts, Home owners, and Commercial clients. We offer our professional services to the entire states of Colorado, Wyoming, and New Mexico.

Advanced Remediation Services, Inc. (ARS Colorado) is a fully licensed and bonded Asbestos Removal, Lead Abatement, Mold Abatement, and Demolition Contractor. ARS Colorado prides itself on attention to detail, exceptional workmanship, and completing projects in a safe and timely manner. The owner of ARS Colorado has many years working with Federal contracts, School districts, Home owners, and Commercial clients. We offer our professional services to the entire states of Colorado, Wyoming, and New Mexico.

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Radon Detection and Reduction questions, answered by experts

It is possible to test for radon yourself using DIY radon test kits, but these at-home test kits should never be a replacement for professional radon testing. DIY test kits can provide some information about radon exposure in your house, but your indoor temperature and humidity can affect the results, as can improper usage of the test kit. You could save yourself some money by hiring a radon professional to begin with, and when it comes to your family’s safety, hiring an experienced professional to do the testing is usually the best option.

Properties should ideally be tested for radon every 2 to 5 years or sooner when changes to the property structure or ventilation occur that might impact airflow.

Yes, if high levels are detected, professionals can provide solutions for radon reduction.

Radon detection is crucial as prolonged exposure to radon gas, a leading cause of lung cancer, poses significant health risks in residential environments.

Avoid opening windows and keep doors closed during testing to obtain accurate readings.

The Mesa, CO homeowners’ guide to radon detection and reduction services

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