Legal analysis: the house demolition agreement must be signed by the head of the household, otherwise it will be invalid. 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: Article 17 of the Regulations on Expropriation and Compensation of Houses on State-owned Land. The compensation given by the people's government at the city or county level who made the decision on house expropriation includes: (1) compensation for the value of the house to be expropriated; (two) relocation compensation and temporary resettlement caused by the expropriation of houses; (3) Compensation for losses caused by expropriation of houses. The people's governments at the city and county levels shall formulate measures for subsidies and incentives, and give subsidies and incentives to the expropriated people.