Yes you will, and any of the other houses, unless one of them is you main residence at the time of sale . You need to have been living there for at least a year at time of sale. You can't avoid it as all sales are registered against your NI number these days, so declare it and bit the bullet. You have CGT allowance each year, and anything over that is based in your income in the year of sale to determine which rate of CGT you pay. PM me if you have any sleep I fix questions.