@Tom541, it is always good to make all guests aware but also keep in mind that noise does not affect all people the same. In my case, over 25 different reservations were technically affected by the construction outside but only one guest seemed to care (also a very experienced Airbnb user.) Try sleeping in the space as soon as you can so you can share the same experience. I found that if all the windows were shut and the a/c or fan was on then the construction noise was a little hum in the background. So I didn't want to make it sound to the guest like this 'disruption' was going to ruin their vacation and they better cancel and book elsewhere. Some days they won't even be working and other days the noise will be happening when the guest is out. It is not like it is going on and on at 2am and the guest is forced to find another place to sleep in the middle of the night (that would be an extremely different cause for concern.) That being said, I did subtle things as to say "I'm sorry this is happening but please be flexible because I have no control over this." I left ear plugs in the night stand draw, left a bottle of wine or something more than I usually would. Sometimes if I noticed the noise was loud in the morning, I would send a message inviting them out for coffee, etc. I kept all the windows in the apartment shut and the a/c on when they arrived with hope that they would continue that pattern (the guest who complained kept the windows wide open his entire stay.... obviously there will be noise outside with the windows open!!)
Anyway, you just clearly don't know what will happen and I can tell that you want all your guests to be happy (as do I.) But I also think there are risks we all take with Airbnb. I am assuming your guests are paying a very low price compared to a hotel. A hotel has so much more control over these things. Airbnb hosts do not. When I book as a guest on Airbnb I consider those risks and it's safe to say that in many circumstances I can be flexible about it.