Radon Mitigation Cost in Ohio (2026)

Ohio Radon at a Glance

Ohio sits at approximately 5.0 pCi/L average indoor radon — 25% above the EPA action level of 4 pCi/L. Studies estimate that roughly 45% of Ohio homes test above the action level. If you haven't tested your Ohio home, you should.

The highest concentrations occur in central Ohio over glaciated limestone and shale deposits. The Columbus metro, Licking County, and the Central Ohio Plains corridor consistently show elevated readings. Western and northeastern Ohio also run high.

What Mitigation Costs in Ohio

Ohio is a mid-priced market for radon mitigation — cheaper than coastal states, roughly in line with the Midwest average.

Slab or Finished Basement: $900–$2,000

A standard sub-slab depressurization (SSD) system in Ohio typically runs $900–$1,600 for a straightforward job. Complex routing through finished walls or across multiple foundation zones adds cost.

• Simple slab, single zone: $900–$1,300
• Finished basement, standard routing: $1,200–$1,800
• Multiple sub-slab sections: $1,500–$2,200

Crawl Space: $2,500–$6,000

Ohio has a significant number of homes with partial crawl spaces, particularly in rural and older suburban housing. Crawl space jobs require vapor barrier work and often take longer.

• Basic crawl space: $2,500–$3,500
• With vapor barrier upgrade: $3,000–$5,000
• Difficult access, large footprint: $4,500–$6,000

What Drives Costs Up in Ohio

Foundation type mixing: Many Ohio ranch homes have a partial basement under part of the house and a crawl space under the rest. Separate piping for each zone adds $500–$1,200.

Sub-slab communication: Central Ohio's glaciated limestone geology often has poor sub-slab communication in pockets of packed clay. Contractors may need higher-suction fans or multiple suction points.

Columbus market vs. rural Ohio: Columbus, Cleveland, and Cincinnati contractors typically charge $100–$300 more than rural contractors due to labor market differences.

Ohio Radon Regulations

Ohio does not require a state license for radon mitigators. However, the Ohio Department of Health recommends using NRPP or NRSB certified contractors and maintains an informal referral list.

The absence of a licensing requirement means it's more important to verify certification independently. Ask for the NRPP or NRSB certification number and check it at radonproficiency.org or nrsb.org before signing a contract.

Getting Multiple Quotes

In Ohio's competitive market, getting 2–3 quotes from certified mitigators often reveals a $200–$500 spread for the same job. The Columbus, Cleveland, and Cincinnati metros have enough certified contractors to make comparison shopping easy. Rural areas may have fewer options, but it's still worth requesting multiple quotes.

Resources

• Ohio Department of Health Radon Program: 800-523-4439
• Verify NRPP certification: radonproficiency.org
• Verify NRSB certification: nrsb.org

Find certified radon mitigators in Ohio →