An Act to Require Radon Testing for Certain Commercial and
Maine Legislature, Session 132, LD 1232
Committee: Housing and Economic Development
Sponsors: RUDNICKI
Amends: 30-A MRSA §4105

Legislative Document
No. 1232
H.P. 807
House of Representatives, March 25, 2025
An Act to Require Radon Testing for Certain Commercial and 
Residential Construction
Reference to the Committee on Housing and Economic Development suggested and 
ordered printed.
ROBERT B. HUNT
Clerk
Presented by Representative RUDNICKI of Fairfield.  (BY REQUEST)
Cosponsored by Representatives: GUERRETTE of Caribou, MATLACK of St. George, 
SAYRE of Kennebunk, WHITE of Ellsworth, Senator: GROHOSKI of Hancock.
Be it enacted by the People of the State of Maine as follows:
Sec. 1.  30-A MRSA §4105 is enacted to read:
§4105.  Radon permit
1. Radon permit.  In addition to the requirements of the Maine Uniform Building and 
Energy Code under Title 10, chapter 1103, new construction of or improvements or 
alterations to a commercial structure requiring a building permit and new construction of a 
residential structure must receive a radon permit under this section. For purposes of this 
section, "radon" has the same meaning as in Title 22, section 772, subsection 5.
2. Permit requirements.  Requirements for a radon permit under subsection 1 are as 
follows.
A. A person must be registered under Title 22, section 774 and must apply for a radon 
permit and perform testing to determine the presence of radon and whether there is a 
need for radon mitigation measures.
B. If the testing under paragraph A determines the need for radon mitigation measures, 
a person must be registered under Title 22, section 775 and must design and install any 
radon mitigation measures or equipment required to mitigate the radon.
3. Exemptions. This section does not apply to residential construction:
A. In a municipality that has not adopted a building code; or
B. Performed by the homeowner acting as the general contractor and who provides 
more than 50% of the labor for framing and finishing the structure. 
4. Violations. A person who violates this section:
A. For commercial construction, is subject to a penalty of $1,000; and
B. For residential construction, is subject to a penalty of $500.
A penalty under this subsection is payable to the division of environmental health within 
the Department of Health and Human Services.
SUMMARY
This bill requires a radon permit for new commercial and residential construction and 
for improvements or alterations to a commercial structure requiring a building permit. A 
person registered by the Department of Health and Human Services to test radon must 
apply for the permit and conduct testing, and if it is determined that radon mitigation 
measures are required, the person designing and installing the radon mitigation measures 
must be registered by the department. Residential construction in a municipality without a 
building code or performed by a homeowner acting as a general contractor and who 
performs more than 50% of the framing and finishing of the structure are exempt from the 
permit requirements. Penalties for violations are $1,000 for commercial construction and 
$500 for residential construction.