Oh I went down at midnight and asked when it was going to stop. There was no notice. It sounded like they were sanding something. The girl working the desk was super apologetic- it was clear there was miscommunication between Disney and the construction company going on. She was handling a lot of call complaints too. She said that both night and day CM heads were aware of it and trying to figure out why it was going on. It was supposed to be done at 12:15, but at 1:30 they were still doing stuff.
The day manager called me in the morning and made it right. She was upset on our behalf that it happened, but pretty adamant that it was a fluke that shouldn't have and wouldn't happen again. I got the feeling she had spoken to many upset families that whole morning. We were checking out the next day so we were just extra tired. I think if we had been there longer, they would have granted a room change.
Otherwise, we heard minor noise when we were in the room, but nothing horrible since other lobby noise drowned it out.