Top-rated radon detection and reduction specialists.

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Radon detection and reduction specialists in California

Sam's Home and Commercial Inspectors
PO Box 563
5.00(
7
)
Sam's Home and Commercial Inspectors
PO Box 563
5.00(
7
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Sam's Home and Commercial Inspectors use the latest technology with the good old fashion eyeballs to perform each inspection at the highest level. To ensure every inch of the property is inspected to include structural, electrical, air-conditioning system, plumbing and more. We go the extra mile. Our Inspectors are fully trained by AHIT and InterNACHI as well as certified labs for Radon, Termite, and mold Inspections. We find issues that other Inspectors fail to see. We even have a robot that can get into the crawlspace when humans can't or won't. Let us prove to you that we are the best. We follow the motto, "Let No Man Deceive You".

"Did a great job with all inspections and informing us on what problems were and what they looked like."

Davonte T on July 2024

Sam's Home and Commercial Inspectors use the latest technology with the good old fashion eyeballs to perform each inspection at the highest level. To ensure every inch of the property is inspected to include structural, electrical, air-conditioning system, plumbing and more. We go the extra mile. Our Inspectors are fully trained by AHIT and InterNACHI as well as certified labs for Radon, Termite, and mold Inspections. We find issues that other Inspectors fail to see. We even have a robot that can get into the crawlspace when humans can't or won't. Let us prove to you that we are the best. We follow the motto, "Let No Man Deceive You".

"Did a great job with all inspections and informing us on what problems were and what they looked like."

Davonte T on July 2024


Spartan Home Inspections LLC
4010 Tropical Ln
No reviews
Spartan Home Inspections LLC
4010 Tropical Ln
No reviews

Locally family owned Company in Columbia, Missouri. We service all of Mid-Missouri. We offer home inspections, radon inspections, and Termite inspections. We treat everyone like family and treat every inspection as if we were buying the house personally.

Locally family owned Company in Columbia, Missouri. We service all of Mid-Missouri. We offer home inspections, radon inspections, and Termite inspections. We treat everyone like family and treat every inspection as if we were buying the house personally.


Pure Air Of The Ozarks
119 W COMMERCIAL ST
4.86(
7
)
Pure Air Of The Ozarks
119 W COMMERCIAL ST
4.86(
7
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Our cutting-edge Dry Fog technology is the leading solution for homeowners and businesses alike, as it is widely used across many industries in eliminating mold. Mold is indiscriminate as to where and what types of facilities it affects. Our process was developed so that it can be applied anywhere and everywhere mold appears without requiring demolition, toxic chemicals, significant cost or down-time. Regular business hours are Monday through Friday from 8am to 5pm. Weekends and evenings can be arranged as needed by appointment.

"Rescheduled a few times but was kind and got the job done"

Shanna R on January 2024

Our cutting-edge Dry Fog technology is the leading solution for homeowners and businesses alike, as it is widely used across many industries in eliminating mold. Mold is indiscriminate as to where and what types of facilities it affects. Our process was developed so that it can be applied anywhere and everywhere mold appears without requiring demolition, toxic chemicals, significant cost or down-time. Regular business hours are Monday through Friday from 8am to 5pm. Weekends and evenings can be arranged as needed by appointment.

"Rescheduled a few times but was kind and got the job done"

Shanna R on January 2024


Show Me Home & Building Inspections
Wildcat Rd
5.00(
2
)
Show Me Home & Building Inspections
Wildcat Rd
5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

When it comes to home and building inspections, there’s no one better to turn to than Show Me Home and Building Inspections. My services include residential inspections, 4-point inspections, commercial inspections and radon testing. I’m a certified, independent home and building inspector, who cares about your investments. I'll work with you to make sure you understand all the details of my findings about your property and that you have all the information you need about the condition of the property to make your investment.

"Milton Wright was the most courteous, thorough, and affordable building inspector. I don't think you could find a better one if you searched all day! Nick and Marilyn Nivert"

nick n on May 2021

When it comes to home and building inspections, there’s no one better to turn to than Show Me Home and Building Inspections. My services include residential inspections, 4-point inspections, commercial inspections and radon testing. I’m a certified, independent home and building inspector, who cares about your investments. I'll work with you to make sure you understand all the details of my findings about your property and that you have all the information you need about the condition of the property to make your investment.

"Milton Wright was the most courteous, thorough, and affordable building inspector. I don't think you could find a better one if you searched all day! Nick and Marilyn Nivert"

nick n on May 2021


ASB Property & Estate Maintenance LLC
P.O. Box 7951
No reviews
ASB Property & Estate Maintenance LLC
P.O. Box 7951
No reviews
12 years of experience

All aspects of Home Repair and Maintenance Remodeling Home Improvement Yard Maintenance Painting Commercial and Residential Fully Licensed, Bonded and Insured Free Estimates

All aspects of Home Repair and Maintenance Remodeling Home Improvement Yard Maintenance Painting Commercial and Residential Fully Licensed, Bonded and Insured Free Estimates


Centurion Inspection Services LLC
No reviews
Centurion Inspection Services LLC
No reviews
19 years of experience

We offer inspection services for homes, businesses and apartments. Getting into something on your own can be devastating, we can show you what you are really getting for your hard earned money. Thinking of renting or leasing? We do quality inspections to ensure you are getting the most bang for your buck. Ready to buy that first house or don't know what to look for? Let us show you the ins-and-outs of the home and property BEFORE you sign the dotted line!

We offer inspection services for homes, businesses and apartments. Getting into something on your own can be devastating, we can show you what you are really getting for your hard earned money. Thinking of renting or leasing? We do quality inspections to ensure you are getting the most bang for your buck. Ready to buy that first house or don't know what to look for? Let us show you the ins-and-outs of the home and property BEFORE you sign the dotted line!


Pangborn Home Inspections LLC
4509 E. Bridgewood Dr.
3.00(
2
)
Pangborn Home Inspections LLC
4509 E. Bridgewood Dr.
3.00(
2
)
Customers say: Terrific value
22 years of experience

ASHI certified home inspector since 2003. We perform whole house inspections which include structural, mechanical, electrical, plumbing, roof, foundation and so much more. We also do termite inspections, radon testing, mold testing and sewer line scans. Call us with any questions.

"This home inspection company left our home after an inspection with our water softener turned off, thermostat turned off, pipe releasing CO2 from our water heater hanging down (which caused CO2 to be released into our home). Due to the lack of caring, professionalism, and assurance our home was left in after an inspection from this company, our family was put at risk for CO2 exposure, temperature of home got extremely low, and hard water filtering through all faucets."

Chelle S on March 2025

ASHI certified home inspector since 2003. We perform whole house inspections which include structural, mechanical, electrical, plumbing, roof, foundation and so much more. We also do termite inspections, radon testing, mold testing and sewer line scans. Call us with any questions.

"This home inspection company left our home after an inspection with our water softener turned off, thermostat turned off, pipe releasing CO2 from our water heater hanging down (which caused CO2 to be released into our home). Due to the lack of caring, professionalism, and assurance our home was left in after an inspection from this company, our family was put at risk for CO2 exposure, temperature of home got extremely low, and hard water filtering through all faucets."

Chelle S on March 2025


SpyGlass Inspection Services
31144 Highland Road
5.00(
2
)
SpyGlass Inspection Services
31144 Highland Road
5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

WELCOME TO SPYGLASS INSPECTION SERVICES, LLC., Since 2008. Residential and Commercial Property Inspections. A professional inspection will significantly reduce your risk and help make the entire home buying process easier and less stressful. We really enjoy helping our clients in this process, as customer service is our highest priority. We strongly encourage all of our clients to accompany us during the inspection and should feel free to ask the inspector any questions you may have during the inspection process. You'll get a comprehensive report that is easy to understand with all major systems identified along with the overall condition will be included in the report. With the information our report will provide, you can make your decision with confidence. Certified Professional Inspector, (InterNACHI Member) I also provide these services, Mold Inspections and Testing, Radon Testing, Water Testing and State Certified Septic and Lagoon Inspections. Come by and visit my Web-site (www.spyglassinspect.com) and chat while your there.

WELCOME TO SPYGLASS INSPECTION SERVICES, LLC., Since 2008. Residential and Commercial Property Inspections. A professional inspection will significantly reduce your risk and help make the entire home buying process easier and less stressful. We really enjoy helping our clients in this process, as customer service is our highest priority. We strongly encourage all of our clients to accompany us during the inspection and should feel free to ask the inspector any questions you may have during the inspection process. You'll get a comprehensive report that is easy to understand with all major systems identified along with the overall condition will be included in the report. With the information our report will provide, you can make your decision with confidence. Certified Professional Inspector, (InterNACHI Member) I also provide these services, Mold Inspections and Testing, Radon Testing, Water Testing and State Certified Septic and Lagoon Inspections. Come by and visit my Web-site (www.spyglassinspect.com) and chat while your there.


Mid MO Inspectors
303 N Stadium Blvd
No reviews
Mid MO Inspectors
303 N Stadium Blvd
No reviews
20 years of experience

Building inspections and Energy Audits for Residential and Commercial properties. Mold, Radon testing

Building inspections and Energy Audits for Residential and Commercial properties. Mold, Radon testing


Environmental Testing & Research Laboratories, Inc
60 Elm Hill Ave.
4.78(
372
)
Environmental Testing & Research Laboratories, Inc
60 Elm Hill Ave.
4.78(
372
)
Customers say: True professional
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"never contacted me"

Bruce H on April 2019

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"never contacted me"

Bruce H on April 2019

Radon detection and reduction services FAQs

You can buy DIY radon test kits from a home improvement store and conduct radon testing, but these tests are often inaccurate. No matter the result, you should supplement DIY testing with professional radon detection and analysis. DIYers only have access to passive radon tests, which aren’t as reliable as active tests that professionals use. Plus, it’s very easy for DIYers to make mistakes during testing, leading to inaccurate results. If you’re moving into a new home, have concerns about radon, or are due for an updated test, hire a professional. 

Radon testing costs depend on whether you hire a professional radon inspector or DIY test. You can expect to pay $150 to $800 to hire a local radon inspector, and home-testing kits range in price from $15 to $250 from home improvement stores. However, it’s best to trust a professional inspector with this task to ensure accurate results. Plus, if you have radon in your home, your testing company can develop a mitigation protocol to keep you and your family safe from the dangerous gas, so it’s well worth the money to hire a professional.

If radon is present in your home, you can expect to pay around $1,000 for a radon mitigation system or between $780 and $1,250 in most cases. The exact price will depend on the severity of the radon leak, home size, and the protocol the radon specialist develops to remove radon from your home and keep it out. Your foundation type will also affect your radon mitigation system cost, as unfinished basements will cost about $4,600 to seal and ventilate, while crawl spaces without a foundation slab may need extra encapsulation, costing $1,500 to $15,000.

Yes, radon testing is absolutely necessary if you suspect the presence of this hazardous gas, and the Environmental Protection Agency (EPA) recommends testing for all homes in the country. Radon is a pervasive natural gas that can leak through your home’s foundation and seep into the living areas. Unfortunately, the gas is highly carcinogenic and is the second leading cause of lung cancer. Radon testing is crucial for keeping you and your family safe from harm, so hire a radon mitigation specialist to test your home if you suspect its presence in your home.

In most states, radon testing companies don’t need to be licensed or certified by the state, but the companies that analyze the test results and develop radon mitigation protocols do. You should choose a radon testing company that suits your needs, but before hiring a mitigation specialist, check our state licensing tool to make sure the company is properly certified.

The homeowners guide to radon detection and reduction services
From average costs to expert advice, get all the answers you need to get your job done.
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