Hi I am currently in the process of buying a house. We have paid our deposit and are waiting on mortgage approval (we already got approval in principle). Our solicitor has come back to us today after receiving the paperwork from the vendors solicitor. There is a two storey extentsion on the house and they never got planning permission . Our solicitor said that this will be a problem for us for getting the mortgage unless the vendor gets retention on this. Does anybody know if this is an easy or difficult thing to get?