
Get matched with top radon detection and reduction specialists in Simi Valley, CA
There are 3 highly-rated local radon detection and reduction specialists.
Need a pro for your radon detection and reduction project in Simi Valley, CA?
Find Radon detection and reduction specialists in Simi Valley
Rainbow International of Simi Valley
Rainbow International of Simi Valley
Established in 1981, Rainbow Restoration® offers home restoration, commercial restoration and carpet cleaning services through over 400 locations worldwide. Our restoration services cover fire damage restoration, water damage restoration, mold removal, smoke damage restoration, and more. When disaster strikes you can rely on rapid and professional restoration service from Rainbow International. Our service locations are on call 24-hours a day, seven days a week. Rainbow International is fully certified by the Institute of Inspection, Cleaning and Restoration Certification. The IICRC has served as the industry guardian for inspection, restoration and cleaning services for over 30 years.
"The guys at Rainbow did an amazing job. We had a toilet overflow and a few rooms got damaged. Luckily they were in and out faster than I expected. Did the job right and precise and I’ll definitely recommend them to anyone who has any water damage."
Chris M on November 2020
Established in 1981, Rainbow Restoration® offers home restoration, commercial restoration and carpet cleaning services through over 400 locations worldwide. Our restoration services cover fire damage restoration, water damage restoration, mold removal, smoke damage restoration, and more. When disaster strikes you can rely on rapid and professional restoration service from Rainbow International. Our service locations are on call 24-hours a day, seven days a week. Rainbow International is fully certified by the Institute of Inspection, Cleaning and Restoration Certification. The IICRC has served as the industry guardian for inspection, restoration and cleaning services for over 30 years.
"The guys at Rainbow did an amazing job. We had a toilet overflow and a few rooms got damaged. Luckily they were in and out faster than I expected. Did the job right and precise and I’ll definitely recommend them to anyone who has any water damage."
Chris M on November 2020

M.O.D. Restoration & Remodeling
M.O.D. Restoration & Remodeling
M.O.D Restoration (Masters of Disasters, Inc.) Specializes in Fire Damage, Smoke & Odor Control, Contents Cleaning, Water Damage, and any sudden disasters. As a former Firefighter I witnessed a lot of devastation and heartbreak during my time, fighting 7 of the top 10 CA wildfires. I also saw a lot of compassion and humanity, but unfortunately their are also people that I saw take advantage of victims in their time of need . M.O.D (Masters of Disasters, Inc.) was born out of the lack of company's that put the needs of their customers over that of profit and were actually skilled in Fire and Water damage restoration, as well as Construction. Our owner has a unique skillset from building homes, to firefighting, and is certified by the I.I.C.R.C in Fire & Smoke Restoration (FSRT), as well as possesses degrees in Fire Science and Building Construction. Our primary goal is to take care of our customers first and help them properly recover. For victims in the Eaton & Palisades fires, we understand the heartbreak and severity, and we have the equipment, skills, knowledge, training and empathy to help you through, navigate the claims and recovery process. For uninsured property owners or recently dropped by your carriers, we are offering additional help, including financing. We urge you to get on schedule for inspection, and or a call as soon as possible so that we may provide some direction. Consultations are free of charge.
"Everyone has provided excellence, from phone calls to in-person consultations. They have gone above and Beyond and met expectations. Nick's background and history in the business are shown through his knowledge. He takes his time to envision what his customers want and does his best to shop for the best prices. Give them a try, and you will not be disappointed."
Priscilla B on September 2024
M.O.D Restoration (Masters of Disasters, Inc.) Specializes in Fire Damage, Smoke & Odor Control, Contents Cleaning, Water Damage, and any sudden disasters. As a former Firefighter I witnessed a lot of devastation and heartbreak during my time, fighting 7 of the top 10 CA wildfires. I also saw a lot of compassion and humanity, but unfortunately their are also people that I saw take advantage of victims in their time of need . M.O.D (Masters of Disasters, Inc.) was born out of the lack of company's that put the needs of their customers over that of profit and were actually skilled in Fire and Water damage restoration, as well as Construction. Our owner has a unique skillset from building homes, to firefighting, and is certified by the I.I.C.R.C in Fire & Smoke Restoration (FSRT), as well as possesses degrees in Fire Science and Building Construction. Our primary goal is to take care of our customers first and help them properly recover. For victims in the Eaton & Palisades fires, we understand the heartbreak and severity, and we have the equipment, skills, knowledge, training and empathy to help you through, navigate the claims and recovery process. For uninsured property owners or recently dropped by your carriers, we are offering additional help, including financing. We urge you to get on schedule for inspection, and or a call as soon as possible so that we may provide some direction. Consultations are free of charge.
"Everyone has provided excellence, from phone calls to in-person consultations. They have gone above and Beyond and met expectations. Nick's background and history in the business are shown through his knowledge. He takes his time to envision what his customers want and does his best to shop for the best prices. Give them a try, and you will not be disappointed."
Priscilla B on September 2024

James Clifton General Contractor
James Clifton General Contractor
We are a Restoration and Home Repair Company. We specialize in FIRE/WATER damage, DRAINAGE/French Drains, crawlspace drainage and clean out, sump pumps, attic and crawlspace insulation and Home Repairs 1. ATTIC/CRAWLSPACE INSULATION 2. HOME REPAIRS 3. RETROFITTING - EARTHQUAKE SAFETY 4. DRAINAGE/FRENCH DRAINS 5. CRAWLSPACE SYSTEMS 6. DOORS & WINDOWS 7. FUNGUS & TERMITE REPAIRS
"Extremely well. They turned up on time, they were efficient and communicated extremely well. Best contractors that we've used."
Alan C on December 2024
We are a Restoration and Home Repair Company. We specialize in FIRE/WATER damage, DRAINAGE/French Drains, crawlspace drainage and clean out, sump pumps, attic and crawlspace insulation and Home Repairs 1. ATTIC/CRAWLSPACE INSULATION 2. HOME REPAIRS 3. RETROFITTING - EARTHQUAKE SAFETY 4. DRAINAGE/FRENCH DRAINS 5. CRAWLSPACE SYSTEMS 6. DOORS & WINDOWS 7. FUNGUS & TERMITE REPAIRS
"Extremely well. They turned up on time, they were efficient and communicated extremely well. Best contractors that we've used."
Alan C on December 2024

Restoration Hunter
Restoration Hunter
We are 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.
"He was friendly, very professional, and answered all my questions clearly about how mold happens in a home. His reasonable estimate and scope of work. What are the steps for mold remediation? Furthermore, I had delicate items around the work area. He was very successful in making sure that nothing was damaged. "Think floor demolition in a China shop" where none of the dishes gets broken. I highly recommend restoration Hunter if you have to deal with mold in the home."
Michele M on May 2025
We are 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.
"He was friendly, very professional, and answered all my questions clearly about how mold happens in a home. His reasonable estimate and scope of work. What are the steps for mold remediation? Furthermore, I had delicate items around the work area. He was very successful in making sure that nothing was damaged. "Think floor demolition in a China shop" where none of the dishes gets broken. I highly recommend restoration Hunter if you have to deal with mold in the home."
Michele M on May 2025

Pure Restoration Inc
Pure Restoration Inc
Quality Service You Can Count On! If you are experiencing water damage, mold or fire damage problems, or simply are just looking to remodel your kitchen or bathroom, Pure Restoration can help you! Our experts are highly knowledgeable with mold testing, structural restoration & remediation, including reconstruction for water damage or fire damage, water extraction and services. Pure can deal with virtually any project and takes pride in leaving our customers satisfied! We offer FREE inspections and estimates for your residential home or commercial property. With over 20 years of experience in the industry, Pure Restoration delivers advanced and reliable professional restoration services including mold inspections and testing throughout Los Angeles.
"The job went smoothly and was completed in a timely manner. The places where there was mold were identified and the drywall and/or insulation were removed. Any mold on wood framing were scrubbed."
Juliette C on May 2024
Quality Service You Can Count On! If you are experiencing water damage, mold or fire damage problems, or simply are just looking to remodel your kitchen or bathroom, Pure Restoration can help you! Our experts are highly knowledgeable with mold testing, structural restoration & remediation, including reconstruction for water damage or fire damage, water extraction and services. Pure can deal with virtually any project and takes pride in leaving our customers satisfied! We offer FREE inspections and estimates for your residential home or commercial property. With over 20 years of experience in the industry, Pure Restoration delivers advanced and reliable professional restoration services including mold inspections and testing throughout Los Angeles.
"The job went smoothly and was completed in a timely manner. The places where there was mold were identified and the drywall and/or insulation were removed. Any mold on wood framing were scrubbed."
Juliette C on May 2024
Pacific Environmental & Abatement Solutions Inc
Pacific Environmental & Abatement Solutions Inc
Southern California's highest rated abatement Company. Additional DBAs - Pacific Environmental & Abatement Solutions Inc. & P E A Solutions.
"He wanted me to tell him where exactly asbestos was located and would Give me a quote. He never asked if He could come lit to inspect. I would Never use this service."
Cathie E on February 2021
Southern California's highest rated abatement Company. Additional DBAs - Pacific Environmental & Abatement Solutions Inc. & P E A Solutions.
"He wanted me to tell him where exactly asbestos was located and would Give me a quote. He never asked if He could come lit to inspect. I would Never use this service."
Cathie E on February 2021
All Clear Environmental Inc
All Clear Environmental Inc
All Clear Environmental is Southern California's one-stop solution for asbestos removal, lead abatement and mold remediation. Our team of licensed professionals has over 100 years of combined experience in the thorough, discrete and environmentally responsible removal of hazardous materials. If you think that your property may be at risk for containing asbestos, lead or mold, we can provide you with the most cost-effective solution. And you can be sure that when we're finished, it will be All Clear.
"Abatement and Remediation are not for the weak or weary - whether managing a personal or professional project, proper containment practices and efforts are essential. I will forever recommend and promote All Clear Environmental - a family-run business with hands-on customer relations. Larry Enos and his son, Beckett, put forth great effort to communicate, assess, and manage the process in good faith. All Clear's team of Rigo et al, handled the physical abatement and remediation, in our home. Rigo and his team made us feel 100% safe, confident, and secure throughout each stage - which was no easy feat with children and pets, in a home. And while there are no accolades for being second-round mold recipients, we hit the jackpot in working with All Clear. We have worked with other companies only to be left with poor communication, a tendency to be overcharged, and dishonesty. Beckett was available almost 24/7 to answer questions via text and live calls. When I felt doubt, Beckett made time to discuss alternative avenues and ensure our best interests were at the forefront of every decision. I recommend All Clear Environmental to friends, neighbors, and strangers with 6/5 stars. Your house is your home - and mold is personal. A company that recognizes the need to love your home well, is a gem beyond measure. Thank you, All Clear Environmental - good people attract good people! Gratefully, Jackie"
Jackie D on August 2024
All Clear Environmental is Southern California's one-stop solution for asbestos removal, lead abatement and mold remediation. Our team of licensed professionals has over 100 years of combined experience in the thorough, discrete and environmentally responsible removal of hazardous materials. If you think that your property may be at risk for containing asbestos, lead or mold, we can provide you with the most cost-effective solution. And you can be sure that when we're finished, it will be All Clear.
"Abatement and Remediation are not for the weak or weary - whether managing a personal or professional project, proper containment practices and efforts are essential. I will forever recommend and promote All Clear Environmental - a family-run business with hands-on customer relations. Larry Enos and his son, Beckett, put forth great effort to communicate, assess, and manage the process in good faith. All Clear's team of Rigo et al, handled the physical abatement and remediation, in our home. Rigo and his team made us feel 100% safe, confident, and secure throughout each stage - which was no easy feat with children and pets, in a home. And while there are no accolades for being second-round mold recipients, we hit the jackpot in working with All Clear. We have worked with other companies only to be left with poor communication, a tendency to be overcharged, and dishonesty. Beckett was available almost 24/7 to answer questions via text and live calls. When I felt doubt, Beckett made time to discuss alternative avenues and ensure our best interests were at the forefront of every decision. I recommend All Clear Environmental to friends, neighbors, and strangers with 6/5 stars. Your house is your home - and mold is personal. A company that recognizes the need to love your home well, is a gem beyond measure. Thank you, All Clear Environmental - good people attract good people! Gratefully, Jackie"
Jackie D on August 2024

Radon Solutions California, LLC
Radon Solutions California, LLC
Welcome to Radon Solutions California, LLC. We take pride in the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you!
"Absolutely amazing experience. My home radon levels were averaging 5.0 pCi/L. Two days after Edward and his team finished the mitigation job the levels went down to 0.3. Incredible result. I can’t be happier."
Francisco D on December 2018
Welcome to Radon Solutions California, LLC. We take pride in the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you!
"Absolutely amazing experience. My home radon levels were averaging 5.0 pCi/L. Two days after Edward and his team finished the mitigation job the levels went down to 0.3. Incredible result. I can’t be happier."
Francisco D on December 2018
Quest Environmental
Quest Environmental
Since 1993, Quality Environmental Services & Technologies, Inc. (QUEST Environmental) has successfully conducted environmental and industrial hygiene assessments in Colorado, across the United States, and throughout the world. During that time, we have assisted thousands of property owners and managers, builders, individual occupants, buyers, and sellers as well as law firms, insurance companies, lenders, universities, school systems, municipalities, government agencies, and industrial entities. We take pride in providing the highest quality consulting and testing services to ensure that our clients live and work in safe, healthy environments.
"Everything went exceptionally well. Everyone that helped me was extremely professional and knowledgeable and were able to help me navigate the process of new homeownership. Would highly recommend!"
Seth C on June 2024
Since 1993, Quality Environmental Services & Technologies, Inc. (QUEST Environmental) has successfully conducted environmental and industrial hygiene assessments in Colorado, across the United States, and throughout the world. During that time, we have assisted thousands of property owners and managers, builders, individual occupants, buyers, and sellers as well as law firms, insurance companies, lenders, universities, school systems, municipalities, government agencies, and industrial entities. We take pride in providing the highest quality consulting and testing services to ensure that our clients live and work in safe, healthy environments.
"Everything went exceptionally well. Everyone that helped me was extremely professional and knowledgeable and were able to help me navigate the process of new homeownership. Would highly recommend!"
Seth C on June 2024
CAWRC
CAWRC
California Water Restoration & Construction is a family-owned business. We specialize in water damage mitigation and restoration, and our team of experienced technicians are dedicated to providing you with the highest quality services. We understand the importance of restoring your property quickly and efficiently and always strive to exceed your expectations. We are committed to providing quality services, as well as honest and transparent communication. With us, you can rest assured that your project is in safe hands. We are licensed, bonded, and insured. All services are provided in a timely and professional manner. We provide free estimates and consultations at the the time of the appointment.
"Great work!"
Julia S on June 2023
California Water Restoration & Construction is a family-owned business. We specialize in water damage mitigation and restoration, and our team of experienced technicians are dedicated to providing you with the highest quality services. We understand the importance of restoring your property quickly and efficiently and always strive to exceed your expectations. We are committed to providing quality services, as well as honest and transparent communication. With us, you can rest assured that your project is in safe hands. We are licensed, bonded, and insured. All services are provided in a timely and professional manner. We provide free estimates and consultations at the the time of the appointment.
"Great work!"
Julia S on June 2023
The Simi Valley, CA 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.
You cannot see, smell, or taste radon, but it may still be a problem in your home. Before hiring a pro, find out how much radon testing costs using this guide.
What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.
Your home’s radon fan replacement cost is minimal in relation to its necessity. However, a few factors vary the project's price.
Can a homeowner install a radon mitigation system? While some parts of the project are fine for DIY, you should leave the meat of the task to a licensed professional.
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.
How long does a radon mitigation system last? A properly installed and maintained system can last 20 years or more, but various issues can reduce the life span.
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