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HF 2297 Iowa House · 2025-2026 Regular Session

A bill for an act relating to radon mitigation in residential buildings.

HF 2297 requires Iowa's building code commissioner to adopt a state requirement that new single-family or two-family residential construction include passive radon gas mitigation systems. Specifically, it mandates using methods listed in Appendix AF of the 2021 International Residential Code for all new homes starting after the rule is adopted. This directly affects residential builders and developers constructing new single or two-family homes in Iowa. The bill focuses on preventive measures during construction, rather than retrofitting existing homes, to reduce radon exposure risks. It does not apply to renovations or existing buildings.
Bill status signed all 5 stages cleared
Introduction
Feb 2026
Committee Review
Mar 2026
House Passage
Apr 2026
Senate Passage
Apr 2026
Signed into Law
May 2026
Introduced Feb 5, 2026 Signed May 19, 2026
Maddy AI version diff · 3 comparisons

What changed between versions

Enrolled → Enrolled with Governor's Action · 1 edit · May 19, 2026
MINOR
The bill text was reformatted from a line-by-line layout to a standard paragraph format, and the effective date was updated from 2026 to 2025. No substantive policy changes were made to the requirements.
Scope change
The scope of the bill remains unchanged, applying to new single-family and two-family residential construction.
TIMELINE

The effective date for the new radon mitigation requirements was changed from 2026 to 2025.

Floor votes · Senate Apr 29, 2026

How they voted

45–0
Passed · 4 other
Total votes 49
Apr 29, 2026
D Democratic15
13 Yea 2
86% Yea
R Republican34
32 Yea 2
94% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
24
Key actions
10
Committee
4
Amendments
3
May 19, 2026
Signed into law
Signed by Governor.
lower
Apr 30, 2026
Lower · Passed
Passed House, yeas 81, nays 3.
lower
Apr 30, 2026
Lower · Passed
House concurred in Senate amendment H-8431.
lower
Apr 29, 2026
Introduced
Senate amendment H-8431 filed.
lower
Apr 29, 2026
Upper · Passed
Passed Senate, yeas 46, nays 0.
upper
Apr 29, 2026
Upper · Passed
Amendment S-5114 adopted.
upper
Mar 19, 2026
Introduced
Amendment S-5114 filed.
upper
Mar 19, 2026
Upper · Passed
Committee report, recommending amendment and passage.
upper
Mar 17, 2026
Legislature · Passed
Subcommittee recommends passage.
legislature
Mar 17, 2026
Upper · Passed
Subcommittee: Webster, Rozenboom, and Staed.
upper
Mar 16, 2026
Legislature · Passed
Subcommittee Meeting: 03/17/2026 10:30AM Room 315.
legislature
Mar 12, 2026
Lower · Passed
Passed House, yeas 87, nays 4.
lower
Feb 5, 2026
Introduced
Introduced, placed on calendar.
lower
0 primary · 0 co-sponsors

Sponsors

No sponsor information available.