Iowa radon requirements for new construction
Iowa Code §103A.8E (enacted via HF 2297), 2021 IRC Appendix AFIn force since July 1, 2026
What your permit set must show
- Iowa Code §103A.8E, enacted by HF 2297, requires the state building code to mandate a passive radon mitigation system per 2021 IRC Appendix AF for new one- and two-family residential construction, effective July 1, 2026.
- The statute names Appendix AF specifically. An earlier AARST summary described this as Appendix BE; the primary bill text controls, and a permit set citing the wrong appendix number risks rejection.
- The precise construction trigger date is contingent on the state building code commissioner's rulemaking following the statute's effective date; confirm the applicable date with the local building department before a permit submission.
Common questions
When does Iowa's radon requirement take effect?
Iowa Code §103A.8E takes effect July 1, 2026. The exact point at which new construction must comply depends on the state building code commissioner's rulemaking, so confirm the applicable date with your local building department.
Is it Appendix AF or Appendix BE in Iowa?
Appendix AF. The enacted bill text (HF 2297) names 2021 IRC Appendix AF specifically, which differs from a description that has circulated citing Appendix BE.
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