What is the term for an arrangement where a tenant allows another party to use their rented space?

The term that describes an arrangement in which a tenant allows another party to use their rented space is known as a sublet. In a subletting situation, the original tenant (sublessor) enters into an agreement with a new tenant (sublessee) to rent out all or part of the rental unit for a specified period of time while still retaining their own lease obligations to the landlord. This allows the original tenant to generate income from the property or to avoid paying rent on a space they no longer occupy.

In many jurisdictions, including South Carolina, tenants must typically obtain the landlord's consent to sublet the property, ensuring that both parties remain aware of their rights and obligations under the lease terms. Subletting can help tenants manage their living arrangements more flexibly, especially in situations such as relocation or temporary absence.

The other terms mentioned in the response have distinct meanings. A lease assignment involves transferring the entire lease agreement to another party, effectively releasing the original tenant from any further obligations. Joint tenancy refers to a legal arrangement concerning property ownership among multiple individuals rather than a rental situation. An occupation permit is generally related to permission to inhabit a space and does not pertain specifically to the tenant-subtenant relationship.