New Homes and Radon Mitigation (RRNC)

Do new homes have radon systems?

Some homebuilders add construction elements to new homes that help make the homes radon-resistant. This is referred to as Radon Resistant New Construction (RRNC). Some go so far as to install a full system with fan. In other states, some homebuilders include radon-resistant construction elements as a value-added feature, or when requested by homebuyers. Learn more about Radon Resistant New Construction (RRNC).

There are advantages to installing a system when building a house

  • The piping can be easily concealed within a wall;
  • The vent pipe can exit the roof and appear as a normal roof penetration;
  • The sub-grade can be prepared to make it easy to collect radon; and.
  • In many cases these systems work well without need for fans.


During the construction of a home, it is possible to treat several foundations by connecting each area to a single vent, which can be concealed in walls. Plus, the system may be effective without the need to install and operate a fan.

Contractors can route the vent pipe in a way that allows easy installation of a fan later if the levels are not acceptable after the home is built.

There may be building code requirements in your city or jurisdiction where regulations govern installation of vent pipes. Check with your builder and local building department.

The International Code Council has published the International Residential Code which has Appendix F as the section which addresses radon resistant new construction techniques.


* Information for this page has been taken from the Arizona, Nebraska, and Wisconsin radon programs as well as EPA’s web site.