A builder is a father figure in dreams; this is because he is a typically male figure working on the house, which represents the self. He can be a reminder of the important influence of your father in your life.
Dreams of carpenters and architects represent that side of yourself that is creative but practical at the same time. Engineers fix things for us in waking life and in your dream they may represent a friend or advisor who is helping you manage destructive emotions. The engineer is also a symbol of the desire to impose order over emotional chaos in waking life.
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