Radon Mitigation & Testing in Plainfield
Plainfield boomed later than anywhere we serve — the median home here dates to 2003 — and it still posts some of the area's higher homeowner-submitted radon readings. New construction doesn't outrun soil gas; sometimes it seals it in.
Newest houses, not lowest numbers
Nearly 15,000 housing units, four out of five of them detached single-family homes, most poured during the 1990s–2000s wave that carried Plainfield from farm town to 51,000 people: this is the youngest housing stock in our service area. It is not the safest. Homeowner-submitted tests in Plainfield have averaged above 6 pCi/L — over the EPA action level — for a simple reason: modern homes are built tight. Less air leakage means better energy bills and also means the winter stack effect concentrates whatever the glacial soil sends up through the slab. The DuPage River running through town doesn't change the soil chemistry either way; only a test tells you your number.
Check your basement for the white pipe
Plainfield's building boom straddles a legal line worth hundreds of dollars to you. Homes permitted after June 1, 2013 were required to include passive radon-resistant construction — look for a capped 3-to-4-inch PVC pipe rising from the slab, often labeled "RADON," running up through the framing. If your house has one and still tests high (passive pipes routinely aren't enough on their own), mitigation usually means adding a fan to the pipe that's already there: the cheapest version of the job, though Illinois requires an IEMA-licensed contractor to do the activation. Pre-2013 homes get the standard full install — around $1,200–$1,700 for most single-family homes here, permitted through Plainfield's Building & Code Enforcement Department.
Protecting the biggest asset on the block
With median home values around $459,000 and household incomes near $144,000, Plainfield homeowners are protecting more house than anyone else in our area — and encountering radon most often at the worst possible moment: inside a purchase contract's inspection window. Illinois sellers have owed radon disclosure since 2008, and buyers' inspectors order 48-hour tests as a matter of course. Getting a licensed measurement — or fixing a known number — before listing turns a negotiation grenade into a one-line selling point: system installed, tagged, verified.
Tight house, high number? It's a one-day fix.
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