The process of leasing space from a Tenant who is already obligated to a Landlord. A tool used to relieve a current tenant from the space. Does not normally release the primary tenant or their guarantors from the original lease. Most leases require Landlords consent. Subtenants need to confirm all aspects of the lease in writing with both the original Tenant and the Landlord. To make them attractive, most subleases are done at a discount from the face rate on the lease and the original primary Tenant absorbs the difference.