Elevated results
Elevated multifamily radon results and the mitigation path
August 12, 2026
What should happen if multifamily radon results are elevated?
The measurement is not the end of the file. If results are elevated, the next job is to obtain bids through local mitigation partners and review those bids against the lender or Agency program so the Borrower is not shopping mitigators alone. That is part of NOI Radon scope, not an extra scavenger hunt after the report lands.
EPA still uses 4.0 picocuries per liter (pCi/L) as the indoor radon action level that triggers a mitigation conversation for homes in the United States. Multifamily programs layer protocol and documentation on top of that number. The point for deal teams is operational: who gets bids, and who checks them against the program.
Who should get the mitigation bids?
Local partners who actually install in that market. A national measurement team that also pretends to be the only mitigator in every city is usually slower and less useful at bid time. NOI Radon works with local mitigation partners, gathers bids for the property, and reviews them against program requirements. You still own the construction decision. You should not have to build the bidder list from scratch on a closing clock.
How do program requirements change the bid review?
FHA and Agency reviewers care whether the proposed system, testing after install, and documentation match the program, not whether a contractor's PDF looks expensive. Bid review is a fit check: scope, follow-up measurement, and whether the proposal can sit in the diligence file. A low number that skips post-mitigation testing is not a bargain if the lender will reject it.
If you already have a preferred contractor, say so in the quote form. The review still has to match the program.
What should owners plan for besides the install itself?
Resident notice, roof or crawl access, electrical, and a follow-up test. Mitigation is construction adjacent to occupied units. The cleaner the original test plan, the less the retrofit fights the building. That is why NOI Radon treats elevated results as a scoped path rather than a surprise after the lab sheet.
| After an elevated result | Who typically owns it |
|---|---|
| Confirm which units or areas drove the result | Measurement team |
| Obtain local mitigation bids | NOI Radon with local partners |
| Review bids against program requirements | NOI Radon with the deal team |
| Choose a contractor and schedule install | Owner / Borrower |
| Post-mitigation measurement where required | Measurement team |
Does an elevated result have to kill the closing calendar?
It can, if nobody started the bidder path until the report arrived. It does not have to, if the measurement scope already included partner bids and program review. Tell us the deadline when you request the quote so the report date and the bid step are on the same calendar.
Use the quote form when you need that path on a live property.