Legal analysis: The house demolition agreement is signed by the householder, otherwise it is invalid. The house demolition agreement is signed by the expropriated person and the house expropriation department. The house expropriation department and the expropriated person may conclude a compensation agreement on matters such as compensation method, compensation amount and payment term, location and area of the property right exchange house, relocation fee, temporary resettlement fee or revolving house, loss of production or business suspension, relocation period, transition mode and transition period. Housing demolition agreement is first of all an agreement and a contract. A contract must have parties, and generally there are at least two parties. The householder is one of the parties, and the agreement is invalid if the householder does not sign it. Therefore, the householder must sign the house demolition agreement, otherwise the agreement will not be established.

Legal basis: Regulations on Expropriation and Compensation of Houses on State-owned Land

Article 25 The house expropriation department and the expropriated person shall, in accordance with the provisions of these Regulations, conclude a compensation agreement on matters such as compensation method, compensation amount and payment period, location and area of the house used for property right exchange, relocation expenses, temporary resettlement expenses or turnover of the house, loss of production or business suspension, relocation period, transition mode and transition period. After the conclusion of the compensation agreement, if one party fails to perform the obligations stipulated in the compensation agreement, the other party may bring a lawsuit according to law.

Article 26 If the house expropriation department and the expropriated person fail to reach a compensation agreement within the signing period determined by the expropriation compensation scheme, or the owner of the expropriated house is unknown, the house expropriation department shall report to the people's government at the city or county level that made the decision on house expropriation, make a compensation decision according to the expropriation compensation scheme in accordance with the provisions of this Ordinance, and make an announcement within the scope of house expropriation. The compensation decision shall be fair, including matters related to the compensation agreement as stipulated in the first paragraph of Article 25 of these Regulations. If the expropriated person refuses to accept the compensation decision, he may apply for administrative reconsideration or bring an administrative lawsuit according to law.