Tenants in Washington must obtain explicit written consent from their landlord before subleasing a rental property. A sublease, or sublet, occurs when a tenant assigns part or all of their lease to a new tenant.In general, most commercial leases permit subletting. This document outlines the terms under which the sublessee will rent the property from the sublessor, defining the dynamics of this unique legal relationship. Edit, sign, and share Commercial Sublease - Washington online. No need to install software, just go to DocHub, and sign up instantly and for free. A commercial sublease is an agreement to lease space from a tenant rather than directly from a property owner. Create your Washington sublease agreement and sublet your rental. Rent your unit to a subtenant with our attorney-approved template. Here is a sample sublease agreement you can fill out or use as a template.