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Verified Reviews for Radon Detection And Reduction pros in Simi Valley, CA
*The Angi rating for Radon Detection And Reduction companies in Simi Valley, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
*The HomeAdvisor rating for Radon Detection And Reduction companies in Simi Valley, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
Last update on October 26, 2025
Find Radon detection and reduction specialists in Simi Valley

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

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

Eagle View Remodeling - Ventura County
Eagle View Remodeling - Ventura County
We have the experience and dedication to bring your dreams to reality! Specializing in adu, roofing ,foundation ,electrical ,plumbing ,hvac ,windows , framing , architect, Engneer , Painting, ,Flooring and Ceramic Tile services, we guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today! Visit our website at https://eagleviewremodeling.com/.
"Amir and his team did a great job with replacing our entire roof."
Todd M on March 2025
We have the experience and dedication to bring your dreams to reality! Specializing in adu, roofing ,foundation ,electrical ,plumbing ,hvac ,windows , framing , architect, Engneer , Painting, ,Flooring and Ceramic Tile services, we guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today! Visit our website at https://eagleviewremodeling.com/.
"Amir and his team did a great job with replacing our entire roof."
Todd M on March 2025

Multipoint Development LLC
Multipoint Development LLC
At Multipoint Development, you will receive the best customer service and professionalism guaranteed. We offer variety of services for your residential or commercial property. If you are a contractor or a builder and need Title 24 Compliance and HERS Inspection (AKA HERS Rater), we got you covered. If you are a realtor or a homeowner and need a Home Inspector, Energy Audit, or Property Photography or Videography we’ve got you covered as well. We use top of the line equipment and extensive training to provide accurate and quality results. Our staff are constantly trained with the most up to date standards of practice for Home Inspections and Energy Audits. Multipoint Development has a 5 Star Rating on Google, Yelp, & HomeAdvisor. You can reach us at 818-747-4016 via call/text or visit our website for more information at MultipointDevelopmentLLC.com
"AMAZING CUSTOMER SERVICE AND QUALITY WORK. EVERYTHING WAS COMPLETED EFFICIENTLY AND HONESTLY. I COULD NOT RECOMMEND FRED MORE HIGHLY."
Howard L on January 2022
At Multipoint Development, you will receive the best customer service and professionalism guaranteed. We offer variety of services for your residential or commercial property. If you are a contractor or a builder and need Title 24 Compliance and HERS Inspection (AKA HERS Rater), we got you covered. If you are a realtor or a homeowner and need a Home Inspector, Energy Audit, or Property Photography or Videography we’ve got you covered as well. We use top of the line equipment and extensive training to provide accurate and quality results. Our staff are constantly trained with the most up to date standards of practice for Home Inspections and Energy Audits. Multipoint Development has a 5 Star Rating on Google, Yelp, & HomeAdvisor. You can reach us at 818-747-4016 via call/text or visit our website for more information at MultipointDevelopmentLLC.com
"AMAZING CUSTOMER SERVICE AND QUALITY WORK. EVERYTHING WAS COMPLETED EFFICIENTLY AND HONESTLY. I COULD NOT RECOMMEND FRED MORE HIGHLY."
Howard L on January 2022
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.
•Discover the average indoor air quality testing cost, what impacts pricing, and how to budget for healthier air in your home.
•Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.

Want to learn how to master DIY radon mitigation? We have a step-by-step guide on how to complete this challenging project on your own.

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.

How long does a radon fan last? Depending on the quality of the fan, usage, and maintenance, a radon fan can last five to ten years.

Knowing how to test for radon will keep your home free and safe from this odorless gas—you just have to decide whether to do it yourself or hire a pro.
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