These tossers put a large conservatory on the house next door.
I've no problem with that...

but they used my front garden as an extension to their building site!
It was winter, so I had the curtains closed for much of the time so didn't see them until they had caused a lot of damage to my lawn.
They even had a truck delivering concrete by snorkel over the house, it had to have stabalising legs - one of which was on my lawn and left a hole two feet deep.

The didn't ask permission at any time, nor did the apologise, even after I emailed their office.
All they did was put a couple of shovelfuls of earth into the hole and left without saying a word.