Under which ownership type may individuals sell their interest without others' consent?

The ownership type that allows individuals to sell their interest without requiring consent from others is Tenancy in Common. In this form of ownership, each co-owner holds a distinct, separate interest in the property, which may vary in size. Each co-tenant has the right to sell, convey, or transfer their interest independently of the others. This means that one tenant can decide to sell their share without having to obtain permission from the other co-tenants, which provides flexibility in the management and disposition of the property.

In contrast, Joint Tenancy typically requires the consent of other joint tenants for any sale or transfer of interest, as any changes would affect the unity of ownership. Tenancy by the Entireties is specifically a form of shared ownership limited to married couples, where neither spouse can independently sell or transfer their share without the other's consent. A Fee Simple Estate is the highest form of ownership and conveys complete ownership without restrictions; however, it doesn't pertain specifically to multiple owners or the ability of an individual to sell without consent, as it refers to sole ownership.