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Verified Reviews for Radon Detection And Reduction pros in San Marcos, CA

*The Angi rating for Radon Detection And Reduction companies in San Marcos, 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 San Marcos, 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 June 17, 2026

Find Radon detection and reduction specialists in San Marcos

Avatar for San Diego Abatement Services
San Diego Abatement Services
4.5(
41
)

Serving San Marcos, CA and surrounding areas

Approved

In business since 1985

Emergency services offered

Warranties offered

"In the middle of having my flooring installed, we discovered that I had asbestos in my kitchen and bathroom- the flooring installers walked out of the job immediately. I had 3 companies come and give me bids. San Diego Abatement Services was the most professional and knowledgeable. They scheduled the job the day after I called. They were polite, efficient, and did exactly what they promised to do. They were not the least expensive- but my confidence in a perfect job and the safety of my home was more important. They sent me the certificate of a clean air test so I can now finish my floors!"
Exterior Painting
Before - Acoustic Ceiling
After - Scraped & Textured
Asbestos Removal
Lead Removal Services

+2

Response time2 days
Response rate98%
1 neighbors recently requested a quote
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Avatar for Palomar Restoration Services Inc
Palomar Restoration Services Inc
5.0(
2
)

Serving San Marcos, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

We offer our amazing services in the vibrant areas of San Marcos, Escondido, Oceanside & San Diego! We are Mold and flood experts. Licensed and insured. We work with all major insurance companies and provide 24 hour Emergency Service. We prioritize professionalism and customer satisfaction, making us the trusted choice for restoration solutions!

7 neighbors recently requested a quote
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Avatar for Vanguard Renovations
Vanguard Renovations
5.0(
4
)

Serving San Marcos, CA and surrounding areas

In business since 2015

Emergency services offered

Credit card accepted

"They were super fast, efficient and vey thorough. They did a great job. We were very happy with the service. They were also very professional."
Recommended by100%of homeowners
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Avatar for KCS Restorations Inc
KCS Restorations Inc
4.7(
33
)

Serving San Marcos, CA and surrounding areas

In business since 2004

Free estimates

"My husband and I are over the moon with the work Krugh Custom Services preformed at our house. We needed dry wall and painting done. Every employee showed up on time and proceeded professionally. They went above and beyond to ensure our house stayed clean while they were performing their work. After the work was finished Dave the owner called to ensure we were pleased with the work of his team. We will be needing the outside of our house painted in the next few month and we will for sure being hiring Krugh Custom Services for that job as well. Couldn't recommend this company enough!"
Recommended by96%of homeowners
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Radon Detection and Reduction questions, answered by experts

While DIY testing is possible, abatement generally requires professional installation to ensure efficacy and meet safety standards.

Abatement includes sealing entry points and venting with systems that reduce radon levels below recommended EPA limits. It is handled by certified professionals.

Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.

No, air purifiers are not an effective way to reduce or remove radon. Radon is a radioactive, inert gas that cannot be filtered by standard air purifiers, which are designed to capture particulates like dust and mold. While an air purifier can improve indoor air quality by removing other pollutants, it should not be relied upon for radon. The only effective solution for high radon levels is a dedicated radon mitigation system.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

The San Marcos, 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.

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