Radon found in house, how does this affect resale.I am about to purchase a house that has radon in it, but is supposed to be mitigated prior to closing. If the mitigation is effective, how could this impact resale of the house in the future. Are you allowed to list houses on MLS that have had positive radon tests? December 12 2011 - Richmond00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.