My wife has told me that she would like to have another baby and that sh would also like to move to a bigger house ( a lot to take in on a Friday morning). We currently own a 3 bed semi d with no mortgage. She has seen a house that she likes and we are viewing it today. ( fast mover my wife). Apparently the bank will lend us 90% of the purchase price and we have the deposit and stamp duty money. My question is: Should we sell our exisiting house before we trade up? Is there any tax implication if we buy the new before we sell the old one. I know the market is slow so it could take a couple of months to shift our 3 bed semi whereas the house of our dreams seems to have come along now.