Seeing oneself demolish a house in a dream is a sign of the death of the owner of the demolished house. Just as dying in a dream signifies the demolition of a house, demolishing a house is a sign of its owner's death. If a person sees himself demolish a house or a historic monument, it signifies sorrow, grief, and evil.
Seeing one's own house collapse upon oneself is a sign that a dead person will be carried out of that house. Or it is a sign that a great calamity will reach the dreamer. If a woman sees the ceiling of her house collapse, it signifies her husband's death...