Hi! I would just keep her where she is, since usually moving a bun to an unfamiliar place is also stressful. Will you be there while the contractors are working? The best I can think of right now would be to close the door to your room and try to sit with her while they are there so that she is not alone. She is likely to handle it better if you are with her.

My bun likes if we leave the tv or radio on for her, we always have something on when we are home and leave something for her if we are gone. We’ve found that if there is nothing on she get very reactive to every noice she hears

You could cover her cage with a blanket to block some of the loud noises?
Maybe provide some chamomile or some cooled chamomile tea as well to calm her nerves

You could also give her some pet rescue remedy. It’s a calming solution