We are buying a house in an area which has a medium risk of radon 3% - 5%. According to estate agent it is nothing to worry about as most homes contain a little of it! I've googled though that a medium risk area should be tested for, this takes about 3 months though. The house was build it 1997...would it have had any radon protection built in with it being not that old I wonder? Anyone have any advice?