HUD and Multifamily Radon Testing for Financing, Refinancing and Environmental Review Support
RADON & CO helps multifamily owners, property managers, lenders, consultants, nursing home groups, affordable housing teams, and facility teams coordinate professional radon testing for HUD-related projects, refinancing needs, environmental review support, and documentation.
What HUD's radon policy actually requires
HUD's current radon policy is Notice CPD-23-103, "Addressing Radon in the Environmental Review Process," issued January 11, 2023. It clarifies that radon must be considered as part of the contamination analysis required under HUD's environmental review regulations at 24 CFR Parts 50 and 58 — the review process that applies to most HUD-assisted multifamily, rehabilitation, and new construction projects. Two details are worth being precise about, since this is an area where it's easy to overstate what the policy says: the Notice does not impose a blanket radon testing mandate on every project, and it does not set a HUD-specific action level separate from the EPA's. It gives environmental review preparers a framework for considering radon risk, strongly recommends testing to ANSI/AARST standards where radon is a live issue at a site, and treats a result below 4 pCi/L as needing no further mitigation documentation beyond the test result itself.
Where testing becomes the practical answer
In practice, a documented professional test is usually the cleanest way to satisfy a reviewer's contamination analysis, precisely because the Notice recommends ANSI/AARST-standard testing as the accepted method for resolving the question. That's true whether the project is new construction, substantial rehabilitation, an acquisition, or a refinance under a HUD-insured loan program — and it extends to HUD's Section 232 program for residential care facilities, which is why nursing homes, assisted living, and other licensed healthcare-related properties financed or insured through HUD fall under the same environmental review framework as multifamily housing.
Best-fit projects
- Multifamily apartment buildings
- Affordable housing and public housing
- Senior housing and assisted living
- Nursing homes and residential care facilities (HUD Section 232)
- Refinancing or financing documentation
- Environmental review support
Documentation support
RADON & CO can help provide electronic test reports and project-level documentation from a digital continuous monitor, following ANSI/AARST-consistent testing practices. Specific HUD, lender, environmental review, or financing requirements should always be confirmed with the project's responsible official, lender, consultant, or program contact — this page is educational and doesn't substitute for that guidance.
Official sources
- HUD Notice CPD-23-103: Addressing Radon in the Environmental Review Process
- RADON & CO Knowledge Center: Does HUD require radon testing for multifamily properties?
Important disclaimer
RADON & CO provides radon testing and documentation support. We do not replace the responsible entity, environmental consultant, lender, or HUD program contact.
Frequently asked questions
Does HUD require radon testing for multifamily properties?
Not as a blanket mandate. HUD Notice CPD-23-103 requires radon to be considered in the contamination analysis for projects subject to 24 CFR Parts 50/58 environmental review, and recommends ANSI/AARST-standard testing, but it does not impose a mandatory test on every project the way a building code would.
How long does a professional radon test take?
Most short-term professional radon tests run for at least 48 hours. RADON & CO places a digital continuous radon monitor, retrieves it after the test window, and provides a clear electronic report.
How much does residential radon testing cost?
Residential radon testing in Montgomery County is $125. Washington DC, Northern Virginia, Howard County, and select surrounding areas typically start at $125 depending on distance, access, and scheduling.
Do you test for real estate transactions?
Yes. RADON & CO is built for real estate timelines and can coordinate with agents, authorized access, closed-house conditions, and electronic reporting.
Do you test commercial properties?
Yes. RADON & CO supports commercial radon testing for multifamily buildings, nursing homes, assisted living facilities, schools, childcare centers, property portfolios, and HUD-related projects.
Do you provide mitigation?
No. RADON & CO specializes exclusively in independent radon testing. If elevated radon levels are detected, we can help explain your results and recommend contacting a qualified radon mitigation professional. To avoid conflicts of interest, NRPP-certified radon measurement professionals are not permitted to perform mitigation on properties they test.