What does it mean when you dream of neighbors? What is the state of your relationship with your neighbor/ neighbors? If you are not close to them, or hate them, then the dream portends bad news to come. It could be that tensions during waking life has triggered the dream.
Dreams continue themes in waking life. If neighbors create such big impressions that you continue to think of them in a dream, then there could be a serious issue with them. You could try to amend the situation by cooling off. Failing all else, you might consider moving away.