This set alarm bells ringing for me, giving a property, but allowing the donor to stay there, other than at commercial rents could be deemed as not giving it at all. I think the correct term is "gift with reservation", which leaves the property still in the Estate for IHT purposes. I am not sure if under the legislation the 10 year gift period takes it out of that, but if it does for sure CGT will kick in. You state that your father died 25 years ago, what were the terms of his will, if he left one? This is not a question easily answered on a web-site. My best advice would be to spend a few pounds and take Professional advice, as that professional would consider your whole circumstances rather than just the ones surrounding your question here. You may well save a considerable amount of money by spending just a few pounds. Most Solicitors will give you a free 1 hour consultation period, or go to CAB. Plus, who knows what is round the corner!!