Alexs Radon Service Llc
Verified Pro
7½+ years online5.0(35)
Radon Mitigation in Columbia, MD
Compare 24 radon mitigation contractors near you in Columbia and surrounding area with an average rating of 4.8/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 23, 2026
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Radon Mitigation in Columbia, MD
Columbia, Maryland radon mitigation specialists in this directory cover Wilde Lake, Town Center, Hickory Ridge, River Hill, and surrounding Howard County. Maryland falls in EPA Radon Zones 1 and 2 — Howard County is Zone 1 and most homes test elevated. Sub-slab depressurization on a typical Columbia basement home runs $1,400-$2,800 installed.
Maryland Department of the Environment publishes county-by-county radon zone maps. Real-estate transactions in Columbia almost universally include radon testing.
Frequently Asked Questions
- Do most Columbia MD homes have radon issues?
- Yes — Howard County is EPA Zone 1, and the majority of homes test above 4 pCi/L.
- How long does radon mitigation take?
- Sub-slab depressurization is a 1-day job.
- What about radon in crawlspaces?
- Crawlspaces require sealed vapor barrier and active sub-membrane vent fan.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across Columbia and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.