Radon Testing During a Home Sale: What Chattanooga Buyers and Sellers Should Expect

Radon shows up in more Chattanooga real-estate deals every year — buyers' agents increasingly order it alongside the home inspection, and East Tennessee's geology gives them good reason. Here's how the process actually works when a house is changing hands, from both sides of the table.

For buyers: get it in the inspection window

A real-estate radon test uses a continuous monitor placed for 48 hours under closed-house conditions — windows shut, HVAC running normally. The monitor logs hourly readings, flags tampering, and produces a same-day report formatted for your inspection file. Placement within a day or two of your call plus the 48-hour test fits comfortably inside a standard option period, but call the moment you're under contract; the calendar is your enemy in a tight window.

What the number means for your deal

At or above 4.0 pCi/L — the EPA action level — the standard playbook is a repair addendum: seller installs mitigation (or credits the cost) before closing. Between 2.0 and 4.0 is judgment territory; many buyers with basement bedrooms negotiate mitigation anyway. Below 2.0, file the report and move on. Mitigation in the Chattanooga area typically runs $900–$2,500 — real money, but small against a home price, which is why radon findings almost never kill deals. They just move a line item.

For sellers: test before you list

The seller who tests first controls the story. If your number is low, the report goes in the disclosure packet as a selling point. If it's high, you fix it on your schedule with your choice of contractor — instead of during a contract negotiation where urgency costs money and a nervous buyer holds the leverage. A pre-listing test plus a mitigation system, if needed, is one of the cheaper "deal insurance" purchases available in this market.

Why tamper-resistance matters

Charcoal test kits have no place in a transaction — they can't prove closed-house conditions and neither side should trust them with money on the line. Continuous monitors log hourly data precisely so both agents can rely on the result. Ours come with same-day written reporting that goes straight into the contract file.

On a deadline right now?

Tell us your inspection window when you call — real-estate tests get priority scheduling: (423) 529-4385. Details on real estate testing, and if the number comes back high, mitigation is usually a one-day fix, guaranteed in writing.