@Louise1117 Definitely inform booked and future guests. However, I would offer 25-50% discount because a total renovation of a next door neighbor’s property for 12-18 months will subject guests to all kinds of undesirables: unbelievable noise, construction dust, dirt and field mice. It also brings strangers (workers) next door.
TBH, as a guest, I would be hard pressed to pick a property with renovations next door going on, especially if I’m vacationing and/or working remotely.
This is just some food for thought.