Certified radon testers and mitigators in Delaware

6 certified radon testers and mitigation contractors in Delaware, from the state's official list or the national NRPP directory.

1 cities & counties6 certified pros

Pros in this state come from the NRPP national certification directory (checked Oct 28, 2026). Get Radon Quotes is independent and not affiliated with NRPP. Some states also require a state license, so confirm with your state radon office before you hire. Your state radon office.

Counties in Delaware A–Z

New Castle County4

Smaller counties in Delaware

Counties with only a few listings so far, grouped by county.

Kent County 1

AmeriSpec of Delaware

Hartly, DE

Certified testing

Get a quote (302) 502-1837 Directions

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Sussex County 1

Lawson Home Services, LLC

Milton, DE

Certified mitigationCertified testing

Get a quote (302) 684-3418 Directions

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What do you need?Not sure? Start with a test. Most homes only need a fix if the result is 4 pCi/L or higher.ZIP codeYour namePhoneContractors usually call to schedule.Email (optional)Anything else they should know? (optional)For example: closing date, basement type, or your result.FoundationYour radon result (if you have one)Situation

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