Why a radon result is worth keeping, not just reading
A radon report is read once and filed in a downloads folder. What gets lost is not the number — most people remember roughly what it was — but everything around it: which laboratory analysed the device, what kind of device it was, how long it ran, and where in the house it sat. Those details are what decide whether a second test years later is comparable to the first, and they are the details a buyer’s surveyor asks for.
Mitigation paperwork disappears faster still. Installers change trading names, warranties sit in a drawer nobody inherits, and the person who knows whether the post-installation test was ever done is often the person who moved out. Documenting radon mitigation at the time it happens costs a few minutes; reconstructing it during a sale costs a re-test and a delay.
What this record holds
- The property — address, property type, where the device was placed, and whether the house was occupied or empty during the test.
- The current test — date, laboratory, device type, serial number, duration, and the result exactly as reported.
- Earlier tests — as many as you have, with notes, shown on a timeline in date order.
- Mitigation history — installer, installation date, fan replacement, warranty wording, and any follow-up test.
It is a record, not an assessment. Nothing here converts a reading, compares it against a guideline, or tells you what to do about it — for that, the radon decision record asks about your situation and produces questions worth taking to a professional, and what pCi/L readings mean explains the units and the published thresholds. This page assumes the deciding is done, or not yet started, and concerns itself only with keeping what you know in a form the next person can read.
Selling or buying? Start here
A documented testing and mitigation history is the difference between a straightforward disclosure and a renegotiation. If a sale is in view, keep this record alongside radon in a home sale, and — once work has been done — organise the record after installation, which deals specifically with what was represented as installed versus what the measurement afterwards reported.
Privacy: what happens to what you type
Everything stays in this browser. The address, the installer, and any contact details you add are saved on this device and printed on your copy — they are not sent anywhere by this page, and nothing here uploads, syncs, or creates an account. Clearing the record deletes it from this device.
Asking a contractor for help is a separate, deliberate step. The request form collects what it needs in its own fields with its own consent step, and this record is not attached to it — you print the sheet and hand it over yourself. What happens to a request sets out every outcome one can reach.
Loading any record saved on this device…
Questions about keeping radon records
How long should I keep radon test results?
For as long as you own the property, and then hand them on. Results are most useful in pairs: a reading taken years apart from a comparable device in a comparable place tells you something a single reading never can. Keeping the paperwork also means a buyer, surveyor, or contractor can see what was already done instead of assuming nothing was.
What details do I need to record besides the number?
The date, the laboratory, the device type, how long it ran, and where in the house it sat. Those are what make a later test comparable to this one. The number on its own cannot be compared with confidence, because a two-day device in a closed basement and a ninety-day device on a ground floor are not measuring the same thing.
Do I have to disclose a radon test when I sell my house?
Disclosure rules are set by state and by contract, and they change — your attorney or agent is the right party to answer for your sale. What is consistent is that a documented history of testing and mitigation is easier to disclose than an undocumented one, and that missing paperwork tends to be resolved by re-testing under time pressure.
How do I document radon mitigation for a future sale?
Record the installer, the installation date, what the warranty says in its own wording, any fan replacement, and the result of the test taken after the work. Warranty terms and fan replacement dates are the two that go missing most often, and both are ordinary questions during a sale.
Is this stored online or shared with contractors?
Neither. The record is saved in this browser on this device and is not uploaded, synced, or attached to any request. Contacting a contractor is a separate step you take on the request form, which collects what it needs in its own fields with its own consent step. You print this sheet and hand it over yourself.
What if I only have some of the information?
Fill in what you have. Every field can be left blank, and the summary tells you plainly which ones are empty — including the ones a buyer or contractor is likely to ask about — so you know what to look for rather than guessing. A partial record beats a folder of loose paper.