Legal analysis: if the owner of the demolished house also includes children, that is to say, the house belongs to the head of the household and the children, and it needs the signature of the children to take effect. But if it has nothing to do with children, the house need not be signed. Ultimately, it depends on the property rights of this house. Whoever writes his name on the real estate license should sign it.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 143 A civil juristic act that meets the following conditions is valid:

(1) The actor has corresponding capacity for civil conduct;

(2) the meaning is true;

(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.

Article 1087 At the time of divorce, the property of husband and wife shall be handled by mutual agreement; If the agreement fails, the people's court shall make a judgment based on the specific circumstances of the property and the principle of taking care of the rights and interests of the children, the woman and the innocent party. The rights and interests enjoyed by husband and wife in the contracted management of family land are protected according to law.