I understand that if you sell the house you're living in to buy another and move to that, there isn't any liability for Capital Gains Tax, no matter how much you've made in the time between when the 1st house was bought and when it is sold.   Does the same thing hold true for Building Plots; if you sell one which you've had for a few years, in order to buy another, then will there be any liability for CGT on the increase in value, and if so does anyone know how it's calculated?