And the wiring. Don’t forget the wiring. Bought a place that had a fault to earth. Took demolishing a wall to find it - previous owner had buried an extension flex inside a wall, just concreted over it - and hadn’t even done that properly - mice had gotten to it, and it was a corroded piss-soaked mess.

I have a photo of the original breaker box that looks like bad AI, it’s so unspeakably awful - just this wild spaghetti of muddy corroded wires and parcel tape with bits of string and random breakers floating in midair at jaunty angles, connected sometimes to live, sometimes to neutral, sometimes across circuits, usually doing nothing. The earthing was purely accidental. I just ripped it all out, but not before the microwave bit me one rainy morning.