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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 December 17, 2025

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

Water, Fire, Smoke, Mold restoration company. We DO NOT provide testing. We Bonded and insured along with being IICRC certified. 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! Check out our services offered and call or click to schedule a free estimate today.\n\nWe also offer Construction services, remodeling, demo, drywall, painting, plumbing, flooring, or any other construction service. Vanguard is a General Contractor.

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

Locally owned and operated full service contractor with the values to treat others how we would want to be treated. We service all commercial and residential drywall needs along with painting, plastering and most all interior finishes that our clients would have need of. If I don't do the trade I can refer you to someone who does at reasonable prices. We bill the project by the size of the contract in 10% @ signing, 35% @ Material Drop Off, 35% @ Drywall Inspection, and 20% @ Drywall Completion. Dave - License # 791348 Charles - License # 841635

Recommended by96%of homeowners
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Radon Detection and Reduction questions, answered by experts

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.

There are steps you can take as a homeowner to remediate radon yourself. While a radon reduction professional can make the biggest impact in your home, you can make efforts to improve radon levels on your own by sealing cracks, increasing ventilation, and testing for radon regularly.

The lifespan of a radon mitigation system depends on the type of system and its maintenance. With proper care, a system can last for many decades. Passive systems tend to last longer as they have fewer components that require replacement. Active systems, which have more moving parts like fans, generally have a shorter lifespan. For instance, water filtration devices and active pressurization systems require more frequent maintenance. While the system as a whole is durable, the radon fan in an active system typically has a lifespan of 5 to 10 years and will need to be replaced. As long as the fan is working, the mitigation system should function correctly.

Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).

Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.

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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