Surprisingly the half century worth of paint on wallpaper on woodchip etc. wasn’t hiding any real DIY disasters. Most of the oddities appear to have been built with the house itself
– Next doors master fuse is in our house (the houses were built as semi-detached)
– 3 phase electric supply despite never being anything other than domestic dwelling
– electric routed across 3 neighbouring gardens to side street, not street in front of the house
All the above discovered when the electricity went out one snowy day. Took them about 4 hours to find the supply
– different height ceilings as different joist depths
– doors jammed into corners so no room for a door frame on one side
– wall between kitchen and pantry ends across a window