Crack caused by neighbor's construction

Talk to your neighbor. His contractor will likely fix it. I assume this is just a crack in drywall rather than in a structural wall.

300, thanks. Yeah I think so.
Should I inform the super before talking to my neighbor?

You have to write to super plus managing agent for the record but mention that you are going to talk to the neighbor and that you hope to resolve this yourself with the neighbor. Cracks are minor issue and can be easily fixed. They will have to paint the full section of the wall if you have eggshell or shinier paint.

Thank you. Very helpful. Will try next week.