Really? You must have...
A) an extremely loud washing machine, or
B) extremely thin party walls, or
C) neighbours with extremely good hearing, and cantankerous with it.
I mean, I can put my washer on and provided I shut the kitchen door, you can't really hear it in the rest of the house. I live in an ordinary house, not one with massively thick stone walls or whatever. Maybe I'm just more hard of hearing than I think. 😂