If thinking of carrying out your own snagging inspection (which we would advise against as our reports are taken much more seriously and developers will also try and fob you off) then check the height of the doors at the base. The NHBC tolerance is a mere 22mm but we often come across doors double the height. Not particularly nice to see someone's feet in a bathroom if the door is too short! The average apartment in London has after all 100 defects regardless of the purchase