Thanks for all the advice. So, if I sell my UK house before 2007 I will, probably, have to pay no tax either in France or the UK, but after that date I will have to pay tax on the profit? Is that the difference in price between what I bought it for and the price I sell it for, or the profit I made after vacating the house? Do you know what the tax is , or is it some horribly complicated calculation (I somehow imagine that it's the latter!).