We lived in during a loft extension and that wasn't too bad. The builders were good about it - it was dusty but they sealed it off best as they could.
It helped it was pre Covid so we were out at work in the day.
At the moment wfh and the noise from the extension has been really difficult. It's the noise that is the worst bit so far. It can go on all day - it's lucky that I can move to the front of the house to work otherwise I don't know what I would do.
They have to put a big steel in and take back a big external wall - so that'll will be noisy but again they can block that off from the rest of the house.
I'm keen to move out for a week while they knock down a wall into the attic on the next stage of the project - so we can seal off all the rooms and minimise dust.
They fixed us up with a temporary washing machine fix - we've still got the kitchen but lost the utility. Took the gas out so bought two portable induction hobs which have been great.
They boarded up the back of the house with insulated board so its not too cold - and put a cat flap in for the rather traumatised cat.
We have limited access to back garden so taking dog out is a pain.
Talk to the builders about washing machines, kitchen access, loos etc - they do this all the time and can make most things work.
But really tidy away as much as you can.