Dream about house being knocked down is a clue for your hopes for future ambitions that you want to be achieve. You are feeling inadequate or insecure about some aspect of your life. You may be feeling left out. This is a signal for a lack of power or control in the direction you are going. Perhaps there was some unfinished issue that is still left lingering for a long time.
House being knocked down is unfortunately an admonition for your lack of confidence, self-defeating attitude and self-doubt
You feel you are being overshadowed and are underestimating your abilities. Perhaps something in your life is not as satisfying as it could be. Your dream stands for a relationship that is going sour. Feelings of inadequacy or weakness and issues of power/control come into play.