We have just got planning permission to do a loft conversion and side return extension on our 3 bed terraced house. We have been told by a couple of builders that the work will take 8 - 12 months. This is far longer than we expected - from our research we had estimated 4 months. We are doing a few other things (knocking the bathroom and toilet into one room, putting in a cloakroom downstairs, plumbing in basement for washing machine but not digging down at all) and we are being quoted 200,000 plus - again, far more than we were expecting. Can anyone share their experience with this type of building work? Thinking of canning the whole project at the moment as I can’t bear the thought of it taking that long.