I built a house in 1984, at a cost of €100,000. I have lived in it ever since. I now wish to sell the house, and it has been valued at €750,000. Do I pay Capital Gains Tax on the difference between 100k and 750k, or is there some form of index linking to reflect the difference between the value of 100k in 1984 and now (2013)? All advice gratefully received.