A house I am looking to buy has the following cracks (see pictures) one is to the side of a lintel and the other vertical crack is just to the left of the window. They are at top of the stair case and above is a further stair case to a converted loft (approx 30 years old). I have had look outside and can see now evidence of cracking in the external brickwork. To save time and costs I was wondering if these are to be worried about? In which case I will go straight to a structural survey rather than a homebuyers and then a structural. The house is a 1960's semi-detached. My first thought is that the stair case is effectively pulling some of the wall which is causing the cracking.