Mandatory Radon Testing For Montgomery County Home Sales

Dated: September 29 2016

Views: 741

The update below is courtesy of Cecelia Adams of RSI Title

Effective October 1, 2016, Montgomery County law requires that “a single-family home located in the County must be tested for radon before completing a sale of the home.” This requirement applies to all single-family transactions for settlements on or after October 1, 2016.  Following is additional information on this new requirement as provided by GCAAR.  If you have any questions, do not hesitate to contact us.

Where Does the Law Apply?

The radon testing requirement applies throughout the County, except in the Town of Barnesville, the City of Rockville, the Town of Kensington, and the Town of Poolesville.

What Homes Must Be Tested?

The law requires the testing of single-family homes, which includes detached single family homes and townhomes, except those units that are part of a condominium regime or a cooperative housing corporation. In addition, the law does not apply if the sale of the home is:

·       Exempt from the transfer tax under Md. Tax-Property Code, §13-207, as amended;

·       By a lender or an affiliate or subsidiary of a lender that acquired the home by foreclosure or deed in lieu of foreclosure;

·       A sheriff’s sale, tax sale, or sale by foreclosure, partition, or by court appointed trustee;

·       A transfer by a fiduciary in the course of the administration of a decedent’s estate, guardianship, conservatorship, or trust; or

·       A transfer of a home to be converted by the buyer into a use other than residential or to be demolished.

The law applies to homes meeting the criteria above with a settlement date of October 1, 2016 or later.

Who Must Do the Radon Test?

The law requires the seller to perform the radon test, or permit the buyer to perform the radon test. If the seller offers the buyer the opportunity to do the test, and the buyer chooses not to, the seller must perform the test to meet the statutory requirement that a test be performed. Both the seller and the buyer must receive a copy of the results of the radon test.

The test may be done by the seller, buyer, or third party (for example a home inspector or radon testing professional) using an approved testing device.

When Must the Test Be Performed?

A radon test must be done within a year of the settlement date in order to comply with the law.  The test must be done with an approved testing device.

Which Testing Devices Can Be Used?

The radon test must be done using a testing device approved for use by the Montgomery County Department of Environmental Protection (DEP). Each device has its own directions that must be followed to ensure accurate results.

Devices approved for use by DEP include:

·       Any test device included on the list of approved devices found on the National Radon Proficiency Program at; or

·       Any test device included in the following table:

Device  Test Type

Accustar Alpha Track Test Kit AT 100    Alpha Track, Long-Term

AccuStar PicoCan-275    Charcoal Absorption, Short-Term

AccuStar PicoCan-400    Charcoal Absorption, Short-Term

Air Chek Radon Test Kit Charcoal Absorption, Short-Term

First Alert RD1 Radon Gas Test Kit      Charcoal Absorption, Short-Term

Kidde Radon Detection Kit       Charcoal Absorption, Short-Term

PRO-LAB Long Term Radon Gas Test Kit RL116      Alpha Track, Long-Term

PRO-LAB Radon Gas Test Kit RA100        Charcoal Absorption, Short-Term

RAdata Radon Test Kit   Charcoal Absorption, Short-Term

As always, do not hesitate to contact us if you have any questions on this or any other matter.


Cecelia A. Adams

RSI Title, LLC

15245 Shady Grove Road, Suite 115

Rockville, MD  20850

301-610-7777 | Fax:  301-610-7760

Email: | Website:

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Charles Chapman

Charles Chapman has more than 25 years' experience in the Montgomery County real estate market. He has been a full-time agent through rising markets and good times, and also through falling markets an....

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