I have an investment property that I have been renting out over the past few years. I plan to sell it in order to extend my own private dwelling. Is there any way I can reduce my CGT bill based on the fact that I am extending my own primary residence? The argument comes from the fact that if you sell a primary residence to trade up - you are exempt from CGT. If my home improvements exceed that of the CGT bill then am I not really doing the same thing? Sounds hopeful, I know!