In Washington, landlords often require written consent for subleasing. Direct lease space is more expensive and more stable while sublease space is less expensive but shorterterm in nature.A sublet, or sublease agreement, adds someone new to an existing lease. Usually the new person (subletter) replaces someone who is moving out. The failure of the tenant to retain a reversionary interest in the lease is one of the key distinctions between an assignment and a sublease. A sublet is when a tenant allows another person, not on the original lease, live in the rental property with the intent of covering all or part of the rent. Subletting means you have one tenant with a lease on the property. Sublease clauses are inserted into commercial leases to protect landlords from the potential risks of allowing tenants to rent out part or all of their space. A commercial sublease is an agreement to lease space from a tenant rather than directly from a property owner. Sublease rents are typically lower than direct leases, and since most subleased spaces are fully fitted out, businesses can also save on furnishing expenses.