I really feel for you.
Very minor to what you will be experiencing but our neighbour had a large garden room built last year. We have a very tiny garden and the builders were noisy, radio blaring continually and the work went vastly over time. Instead of 12 weeks it went on for nearly 5 months, all through the summer. During this time my Dh had a stroke and was trying to recover at home, with noise, music and the builders talking loudly and singing along to the radio.,
We couldn’t sit in our garden at all as the construction was slap bang up against our fence. Couldn’t put our washing out as the dust was blowing over and the our windows were filthy.
It was a nightmare. Our neighbours are a young family who are very polite and thoughtful and I did ask how much longer would it be going on. They were apologetic but it was beyond their control as things kept going wrong.
They paid for our windows to be cleaned and brought round a bottle of wine.
I’m afraid you are in for a very unpleasant time. Sorry to be so negative but be warned.,