you don't need the husband and wife's signature when you sell the house before marriage. If the house belongs to pre-marital property, then there is no need for husband and wife to sign. Because premarital property belongs to personal property, even if married, the property will not be transformed into the same property as husband and wife. Since it is personal property, it has nothing to do with the spouse. Therefore, when the property is sold before marriage, the husband and wife do not need to sign. However, if the property belongs to the husband and wife, it needs to be signed by the husband and wife.

The following belong to the same property of husband and wife:

1. Salary and bonus;

2. Income from production and operation;

3. Intellectual property benefits actually obtained or clearly obtainable after marriage;

4. Inherited and donated property;

5. The income obtained by one party through personal property investment;

6. Housing subsidies, housing accumulation funds, pension insurance and bankruptcy resettlement compensation actually obtained or should be obtained by both husband and wife;

7. For one-time expenses such as military demobilization fees and self-employment fees, the duration of marriage relationship is multiplied by the annual average, and the amount obtained is the same property.

Legal basis: Article 163 of the Civil Code of the People's Republic of China

The following property is the personal property of one spouse:

(1) one spouse's pre-marital property;

(2) compensation or compensation obtained by one party for personal injury;

(3) property that is determined to belong to only one party in the will or gift contract;

(4) daily necessities exclusively used by one party;

(5) other property that should belong to one party.