We've seen a house we like. It has a lounge at the back and kitchen next to that, which also backs onto the garden. These two areas are currently separated by a wall. We would want to remove the wall between the lounge and kitchen and extend right across the back to create one large area - the new room would measure around 31 x 25 to incorporate a lounge, kitchen and dining room with bifolds on the back. Does anyone have a rough idea what this would cost? We're in Essex. Thank you!