Virginia Code and Adoption of Appendix F of the International Residential Code

Virginia Code and Adoption of Appendix F of the International Residential Code

The Virginia Code currently allows counties or cities that have been designated by the USEPA as high risk (e.g., Zone 1) for indoor radon the option to adopt Appendix F of the International Residential Code (IRC) into their local building code. Several jurisdictions have adopted the code by 2024:

Counties: Amelia, Buckingham, Louisa, Montgomery, Nottoway, Orange, Rockbridge, Shenandoah, Tazewell, Wythe Independent Cities: Blacksburg, Buena Vista, Christiansburg, Lexington, Radford, Roanoke, Salem

By adopting Appendix F into their codes, Radon Resistant New Construction techniques in most new residential single-family dwellings are now required. Note that homes built over ventilated crawl spaces and multi-family buildings are currently exempt.