How Much Does a Radon Mitigation System Cost in Indianapolis? [2026 Data]

Radon detection and reduction costs depend on your project and location. Check with a local pro for your specific job.

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Cost Insights
  • The average cost for radon mitigation in Indianapolis is $0.40 per square foot.

  • Adding encapsulation services, basement sealing, and radon fan installations can significantly increase the cost.

  • Labor rates in Indianapolis fall between $150 and $200 per hour.

  • Having a licensed pro install a radon mitigation system can increase your home’s value by offering added protection from potential radon-induced cancer.

Radon mitigation costs in Indianapolis are $801 on average, but prices can range from $616 to $990. Since almost 33% of homes in Indiana have elevated radon levels, it’s beneficial to invest in mitigation costs to protect your home. Costs vary by radon severity, home size, method, and contractor, so use this guide to help you estimate how much you’ll pay to mitigate radon.

Radon Mitigation Cost Factors 

The average cost for radon mitigation in Indianapolis, Indiana, depends on several factors, including the removal method and home size.

Cost by Method

Passive versus active radon systems and how they work illustrated, with the active system using a fan

The cost of a radon mitigation system depends on the chosen approach, which might be sealing the basement, depressurization, or lower-level pressurization. The depressurization method happens in one of two types: active suction (soil depressurization) or passive depressurization. 

Here’s what to expect for pricing by radon mitigation method:

MethodCost Range in Indianapolis, INDescription
Sealing the basement$400–$4,600Half as effective; may require repeated resealing
Active suction soil depressurization$1,000–$3,000Most common method; PVC pipe suctions gas from beneath foundation
Passive depressurization$500–$2,500Vents radon through PVC piping using pressure differences; low efficiency at high levels
Wall-based systems$500–$3,000Cinder block wall creates vented cavity to exhaust radon
Ventilation systems$1,300–$2,500Two fans remove radon and vent it outside
Water mitigation$2,700–$14,700Uses carbon and aeration to remove radon from water

Cost by Home Size 

The average home size in Indianapolis is 1,900 square feet, according to the Federal Reserve Bank of St. Louis (FRED) Housing Inventory. For the average radon mitigation cost of $800, you’ll spend a little over $0.40 per square foot. Here’s a breakdown of costs by home sizes:

Home Size (Square Feet)Average Cost
1,000$400
1,500$600
2,000$800
2,500$1,000

Radon Mitigation Pro Costs

Radon remediation checklist, including testing for radon every one to two years and installing a cover over the sump pit

The cost to hire a radon detection and reduction specialist in Indianapolis varies by contractor, removal method, and scope. Most radon remediation projects take between four and six hours to complete, so for an average $800 project, pros charge anywhere from $150 to $200 per hour. 

Licensing

Make sure you know who installs radon mitigation systems when searching for a licensed contractor. The state of Indiana requires radon remediation and testing specialists to be licensed through the Indiana Department of Health because this type of work can be dangerous if not handled safely and correctly.

Angi Tip

Exposure to radon over a long period of time can cause serious health problems, including lung cancer. Lowering radon in your home requires professional knowledge and skills only available by hiring a radon mitigation pro.

Caroline Gilbert
Director, Content & Editorial, Angi

Permits

Indianapolis requires professionals to possess active mitigator licenses and mitigation certifications from an Environmental Protection Agency (EPA)-approved program. However, the city does not require a permit for radon remediation.

Taxes

Indianapolis has a combined sales tax of 7.0%. For an $800 radon remediation project, add on around $55 in taxes to prepare for the total project cost.

Additional Pros to Consider Hiring 

You may also need to hire additional pros when planning for a radon mitigation project, including electricians, basement finishing specialists, and foundation repair pros. 

  • Electrician: $50–$100 per hour, may be required for rewiring, radon fan installations, or radon fan replacement services

  • Basement finishing: $7–$23 per square foot, may be necessary for sealing an unfinished basement or installing a new ventilation system

  • Crawl space encapsulation: $2–$10 per square foot, prevents radon from soil and water from entering your home through the crawl space

  • Foundation repair: $1.50–$12 per square foot, which keeps radon from entering your home through cracks

  • Indoor air testing: $300–$585, detects radon and other air quality issues

Does a Radon Mitigation System Increase Home Value?

If you live in a region like Indianapolis, where radon is a common problem, then investing in a mitigation system to prevent radon can increase your home’s value. This is especially true for health-conscious buyers who want to ensure their safety. Radon mitigation systems last for 20 years on average, so outdated systems may need to be replaced to make the most out of having radon mitigation for your home.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.

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