Radon Testing in Urbana, IL
Radon testing and mitigation in Urbana, IL, for older east-side basements, campus rentals, and small apartment buildings on the August lease cycle.
Urbana calls come from two very different owners. One is a family in an older house on the east side of town who has lived there twenty years, finished the basement at some point, and has never tested. The other is a landlord holding two, five, or twenty units within walking distance of the Quad, who has just been asked about radon by a tenant or a parent and does not know where to start.
The answers are different. A single-family basement is one test and, if it comes back high, one system. A rental building is a testing plan, because radon does not distribute evenly across a structure and a garden-level unit can read very differently from the unit above it. Testing one apartment and calling the building clear is the mistake we correct most often in this town.
The other thing Urbana has that most of our service area does not is a hard calendar. Leases here turn over in a compressed stretch in late summer, and that vacancy is the only time a closed-house test can run properly without asking a tenant to keep windows shut in August. If you own rental property near campus, that window is the one to plan around.
Serving all of Urbana, IL and the surrounding Champaign area.
Urbana is the Champaign County seat and the home of the original University of Illinois campus, which means its housing runs from pre-war single-family homes on the east side to blocks of converted student rentals and small apartment buildings close to the Quad. Most of that stock has basements or partial basements poured long before anyone sealed a foundation with soil gas in mind, and the August lease turnover gives landlords a natural, and often ignored, window to test.
Rental and small multifamily testing scheduled around the August turnover
Older east-side basements assessed for entry points before anything gets quoted
Per-unit readings in buildings rather than one test standing in for the whole address
Systems routed and vented with an eye on what a landlord has to maintain long term
Leases, Turnover, and Who Actually Runs the Test
A short-term radon test needs closed-house conditions for at least 48 hours, and that is a genuinely difficult thing to ask of a student tenant in a non-air-conditioned unit in the middle of an Urbana summer. Windows go open, the test gets diluted, and the number that comes back describes a house nobody lives in. This is why we push landlords toward the vacancy between leases rather than testing an occupied unit and hoping the protocol held.
When a building has to be tested occupied, we use continuous monitors specifically because they log hourly. If a door was propped for six hours on a Saturday, the data shows it, and we can tell you whether the result still means anything instead of handing you an average you cannot defend. For a landlord that difference matters, because a disputed number is worse than no number at all.
- •Plan rental testing for the gap between leases, not mid-semester
- •Continuous monitors show whether closed-house conditions actually held
- •Ground-floor and garden-level units usually read highest, test those first
Pre-War Basements East of the Quad
A lot of Urbana's older housing has fieldstone or early block foundations, rubble-filled walls, and floors that were poured thin or poured later over what used to be dirt. Those basements have more soil contact and more unsealed openings than a 1990s subdivision basement does, and the entry points are rarely one obvious crack. They are the perimeter joint where the floor meets the wall, the gap around a cast iron stack, an old coal chute opening, and the unsealed pit for a floor drain.
That changes the mitigation design. Older floors sometimes sit on very little aggregate, which limits how far a single suction point can pull, so we do a communication test before committing to a layout rather than drilling one hole and hoping. It is also why we seal the obvious openings as part of the work rather than treating sealing as an optional extra: on this housing stock the fan has to fight the leaks it cannot close.
Why One Reading Is Not Enough in a Multi-Unit Building
Radon enters at the lowest point in contact with soil, and everything above that is diluted by however much air moves between floors. In a converted Urbana house split into three or four units, the basement apartment and the second floor can produce numbers far enough apart that a single test is actively misleading in both directions. Test only the top unit and you miss the problem. Test only the basement and you may spend money treating apartments that never needed it.
For buildings, we plan the number of devices around the footprint and the number of separate ground-contact areas, then report unit by unit. If a system is warranted, the design question becomes where the vent stack can run without cutting through somebody's living room, which in these older converted properties usually means an exterior route rather than an interior chase.
Frequently Asked Questions
Do Illinois landlords have to test rental units in Urbana for radon?
Illinois law does not require a landlord to test every unit. What you have to tell tenants about a known result depends on your units and your leases, so ask your attorney what applies to you. What is certain is that once you have a high result you are holding information you cannot un-know. Most Urbana landlords we work with test because a parent asked, not because a statute forced it. Our part is producing a defensible number.
Can you test my campus-area rental while students are living in it?
Yes, with a continuous monitor and a conversation with the tenants first. The risk is closed-house conditions breaking, which in an Urbana August usually means windows. The monitor logs hourly, so we can see whether the test held and re-run it if it did not. If you have any flexibility, testing during the vacancy between leases is cleaner and cheaper.
My Urbana basement has a stone foundation. Will a system even work?
Usually yes, but the design takes more thought than it does on a modern poured wall. Older foundations leak air at the wall-to-floor joint and around old penetrations, so sealing those openings is part of the job rather than an upsell, and we test how well suction travels under the floor before committing to a single suction point. Some of these houses need two.
I am buying a house in Urbana. Does the seller have to tell me about radon?
Illinois requires sellers of residential property to give buyers a radon disclosure form and the state radon pamphlet, and to disclose radon test results they know about. That is not the same as a test. If nobody has ever tested the house, the disclosure will say exactly that, which is why buyers here order their own test during the inspection period.
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