Janet MatchinskyWhen selling a home with a radon mitigation system, prepare the test history and installation records before listing. Describe the system accurately, provide the required radon disclosure information, and make the equipment accessible for a buyer's evaluation. The presence of a system is useful information, but it should not be presented as a permanent guarantee about indoor radon levels.
I recommend gathering these records with the rest of your seller preparation file. Contact me if you are planning a sale and want to identify the documents a buyer is likely to request.
Build a chronological radon folder
Start with the earliest report you have, then add installation records, post-installation testing, later tests and service invoices. Keep full reports rather than a photograph of a single result. Dates, test locations and the identity of the testing professional help the reader understand what each document describes.
If the system was installed before you owned the home, look in your original closing and inspection files. Ask the installer for duplicate records if needed. Label missing information as missing; do not reconstruct an installation date from memory and present it as certain.
Use a short cover sheet to list the documents in order. Its purpose is to help a buyer find the underlying records, not to replace them with a seller-written conclusion that the home has passed radon.
Provide the required disclosure information
Minnesota's Radon Awareness Act requires specified information before a residential purchase agreement, including known radon information and relevant system documentation. The statute is Minnesota Statutes section 144.496. Ask your agent to ensure the applicable disclosure packet and educational material are complete.
The Minnesota Department of Health's radon real estate guidance explains the disclosure content and distinguishes disclosure from testing and mitigation. Statewide testing and mitigation are not automatically required simply because a home is being sold, although MDH recommends testing and the parties may negotiate related terms.
Answer the disclosure questions from your records and knowledge. If you know of a past result or system problem, do not omit it merely because a later repair or test followed. The chronology can explain what occurred and how it was addressed.
Identify the system and its instructions
Ask the installer or qualified radon professional to identify the system type, components, installation date if known, and operating instructions. Locate any labels and the available maintenance plan. Provide the buyer with a clear way to identify the equipment without needing to guess from a pipe in the utility room.
MDH's requirements for radon licensees include operation, maintenance and monitoring documentation for mitigation work. If those materials are missing, ask the professional what records can be supplied for your installation.
Do not improvise a maintenance procedure for the buyer. A simple note identifying where the instructions are stored and whom to contact is more useful than an unsourced list of equipment settings. Keep the professional's instructions with the actual system records.
Check the file against the equipment
| Record or observation | Question to resolve before listing |
|---|---|
| Installation paperwork | Does it describe the system currently present? |
| Test reports | Are dates, locations and full results available? |
| Service invoices | What was repaired or changed? |
| System labels | Are identifying information and instructions legible? |
| Monitoring information | Can the owner explain the professional's stated check procedure? |
| Warranty documents | What terms apply, and is transfer addressed? |
| Later remodeling | Was the radon professional told about relevant changes? |
If a fan was replaced, keep that invoice alongside the original installation record. If a basement was remodeled, describe the work accurately when consulting a radon professional about testing or system evaluation. Let the professional decide what the change means for the system.
Photographs can help locate components, but they should supplement the records rather than establish performance. A picture of installed equipment cannot replace a radon test report.
Decide whether to obtain updated information
If your latest test is old, incomplete or difficult to interpret, discuss testing with a licensed radon professional before listing. Ask how the test should be conducted, what conditions must be maintained and when the result will be available. Use the professional's process rather than trying to fit a test into an unsuitable window between showings.
If the equipment has a known fault, obtain a service evaluation and written scope. Decide how the work fits your listing schedule. Save the repair and follow-up documentation so the buyer can see what was done.
Avoid treating a fresh test as a way to erase older records. It adds current information. A buyer may still choose to arrange an independent test under the purchase agreement, and your preparation should make that process easier to coordinate.
Write a factual listing description
A useful description can say that a mitigation system is installed and that records are available, when both are true. Avoid absolute statements such as radon-free or permanently safe. Those phrases go beyond what an installation record or a particular test can establish.
If you mention a test result, identify its date and provide the complete report through the appropriate transaction process. Do not select the most favorable number from several documents while omitting the rest. Keep the listing remarks consistent with the disclosure file.
For a home sale in Alexandria, this record preparation belongs alongside ordinary marketing work. It gives buyers specific information without turning a feature description into a technical certification.
Coordinate a buyer's test carefully
Once under contract, identify the inspection deadline and any agreed radon terms. Confirm access for the testing professional and make sure everyone occupying the home understands the testing instructions. Pets, deliveries and showings may need to be coordinated around that process.
If a result leads to a repair or credit request, ask for the written report and a professional explanation of the proposed response. Then negotiate a specific scope, responsibility and completion plan. Do not promise a technical outcome or deadline before checking what the professional can provide.
The inspection-contingency article explains why testing, negotiation and contract deadlines must be managed together. Keep the actual signed amendment as the record of any changed obligation.
Prepare the handoff at possession
Leave the operating instructions, installer contact, service records and agreed warranty information in an organized package for the buyer. Confirm where monitoring information is located. Avoid changing or disabling equipment as part of moving or utility adjustments without appropriate professional direction.
Before the final walk-through, make sure the system is accessible and the agreed work is documented. If a question remains, identify the professional who can answer it rather than providing an uncertain technical explanation yourself.
Call or text (320) 219-2488 to plan the sale of a home with a mitigation system. I can help organize the disclosure and transaction records while the radon professional handles testing and equipment questions. My seller page covers the rest of a listing with me.