Radon Mitigation & Testing in Crest Hill
Crest Hill's 8,100 households span every radon era — postwar ranches, a 1990s core, and a third of the stock built after 2000 — and with roughly a third of homes renter-occupied, Illinois's 2024 tenant radon law lands harder here than anywhere else we serve.
Three building eras, one common denominator
Crest Hill's median home dates to 1992, but the average hides the spread: about 7% of the city predates 1940, a band of 1950s–70s ranches and split-levels fills the middle, and roughly 2,700 units — over a third of the city — arrived after 2000. Not one of those eras built radon protection in unless the home went up after June 2013, when Illinois finally required passive systems in new construction. The city itself is younger than many of its houses: Crest Hill incorporated on January 22, 1960, largely to avoid being annexed by Joliet, so its pre-1940 homes predate the city they now sit in. Old slab cracks, mid-century sump pits, tight new envelopes: different entry paths, same gas, same fix. Median home value here is about $232,900, which makes a $1,200–$1,700 system a meaningful but very recoverable share of the asset it protects.
Landlords: 2024 changed your checklist
About a third of Crest Hill's occupied homes are rentals — the highest share in our service area. Since January 1, 2024, Illinois requires radon disclosure in most residential leases below the third floor, gives tenants a window to test, and — if a confirmed hazard goes unmitigated by a licensed contractor — can give them a path out of the lease. For a landlord with a handful of Crest Hill units, a documented licensed test per building, repeated on a sane cycle, converts an open-ended legal exposure into a line item. We arrange multi-unit testing and, where needed, mitigation with the required IEMA license tags on every system.
The numbers around you
Will County's Zone 2 designation predicts moderate averages, yet the American Lung Association's analysis of Illinois Emergency Management Agency testing data shows over 40% of homes at or above the 4.0 pCi/L action level, and homeowner-submitted readings in the Joliet area (per radonresources.com) average in the 6s. Crest Hill permits run through the city's Building Department on City Center Boulevard — routine paperwork your installer files with the quote. First step stays cheap: the Will County Health Department's $8 kit, sold minutes away in Joliet.
Crest Hill isn't the only Will County town where we work these numbers — see the local specifics for Lockport, Plainfield, and Shorewood if you're comparing notes across the area.
Homeowner or landlord — get your Crest Hill number.
Call (815) 348-6800Frequently asked questions
I'm a landlord with a few Crest Hill units — what does the 2024 law actually require?
Since January 1, 2024, Illinois requires radon disclosure in most residential leases for units below the third floor, and tenants get a defined window to run their own test. If that test confirms a hazard and it isn't mitigated by a licensed contractor, tenants can have grounds to end the lease early. With roughly a third of Crest Hill's homes renter-occupied — the highest share we serve — that's real exposure. We test and, where needed, mitigate multiple units on one visit so you're covered building by building, not house by house.
My Crest Hill house is a 1960s ranch — does its age make radon better or worse?
Neither, really — it just changes how radon gets in. Crest Hill's housing spans three eras: a small pre-1940 slice, a band of 1950s–70s ranches and split-levels like yours, and the 35% built after 2000. None of them had radon protection built in unless permitted after June 2013. A mid-century ranch typically has an older slab with more cracks and a sump pit as an entry point, versus a newer home's tighter, sealed envelope — different paths, same fix: one sub-slab suction point and a fan.
Crest Hill homes run more affordable than the rest of Will County — does that change the fix?
Not the fix, just the math. A typical install still runs $1,200–$1,700 regardless of whether the house is worth $232,900 or twice that — the price follows the foundation, not the appraisal. On a Crest Hill home, that's a genuinely small share of the asset for a permanent, tagged, tested fix, and it's one you can point to the next time you sell, since Illinois has required seller radon disclosure since 2008.
Can you test more than one rental unit at once?
Yes, and for Crest Hill landlords it's the practical way to handle the 2024 disclosure law without a separate service call per address. We schedule licensed measurement across a portfolio in one pass, flag any building that comes back at or above the 4.0 action level, and arrange mitigation with the required IEMA license tag on each system we install. One documented cycle covers your whole checklist instead of one unit at a time.