Radon Mitigation Pros in Miami, FL

Finding a qualified radon mitigation contractor in Miami shouldn’t require a background in environmental science — but the local market makes it harder than it should be. Florida has no mandatory state licensing for radon professionals, which means anyone with a truck and a fan can call themselves a “radon contractor.” This directory cuts through that noise: every pro listed here holds active NRPP or NRSB credentials, the only third-party certifications that actually mean something.

How to Choose a Radon Mitigation Contractor in Miami

• Verify the credential, not just the claim. Ask for their NRPP or NRSB certificate number and cross-check it at nrpp.info or nrsb.org. Florida doesn’t require a state license, so the national credential is the only meaningful vetting bar.
• Separate measurement from mitigation. These are distinct certifications. The pro who tests your home shouldn’t be the same one selling you a $1,200 system — conflict of interest is real. Hire an independent tester first if you’re starting from scratch.
• Ask about slab construction. The majority of Miami homes are built slab-on-grade over oolitic limestone — a porous, karst-style substrate. Mitigation on this geology requires suction points drilled through the slab, not a typical sub-membrane approach used in crawl-space homes. Contractors unfamiliar with South Florida construction will get the diagnosis wrong.
• Get a post-mitigation test in writing. Any reputable contractor includes a follow-up measurement 24–48 hours after installation and documents pre/post pCi/L levels in a written report. If they don’t offer this unprompted, keep looking.
• Check their real estate experience. Miami’s market moves fast. If you’re mid-transaction, confirm the contractor can deliver a certified report within your inspection window — delays here kill deals.

Pro Tip: Miami-Dade County falls mostly in EPA Zone 3 (low predicted average indoor radon), but “low average” doesn’t mean your specific slab is clean. Florida’s phosphate-bearing soils and limestone substrate produce localized hotspots. Test first, assume nothing.

What to Expect

A radon test runs $150–$400 depending on whether it’s a short-term (48-hour) or long-term (90-day) measurement and whether a certified pro conducts it or you’re using a certified lab kit. If results come back above 4 pCi/L — the EPA’s action level — a full active soil depressurization (ASD) system runs $800–$1,500 installed, with most Miami jobs landing in the $900–$1,200 range for a single-family slab home. The install itself takes 3–5 hours; post-mitigation testing happens 24–48 hours later.

Reality Check: The contractors who quote $400–$600 for “mitigation” are usually selling you a passive vent pipe with no fan — ineffective on most Miami slabs and not an EPA-compliant ASD system. If the quote seems low, ask specifically: “Does this include an active fan, post-mitigation testing, and a written certified report?” The answer tells you everything.

Local Market Overview

Miami’s hyper-active real estate market — consistently one of the highest transaction volumes in the country, with a significant share of international buyers unfamiliar with EPA radon protocols — means demand for fast, credentialed testing spikes during inspection periods. Florida’s lack of mandatory contractor licensing puts the entire burden of vetting on the buyer, which is exactly why credential verification isn’t optional here; it’s the only filter you have.