A California sublease agreement is a written arrangement that involves a residential tenant leasing their rental property to a subtenant. 2.2 Sublessor authorizes Agent to: (a) Place advertising signs on the Property;.(b) Place a lock box on the Property if vacant;. An effective sublease agreement should clearly state the terms of the rental. Sublet your property in California with confidence using our customizable agreement template. Ensure legal compliance. A California sublease agreement is a document between a current tenant (sublessor) and a subtenant for residential use. California law requires tenants to seek explicit, written permission from their landlords to sublet if it is not already allowed in the lease. Research local laws: Check state laws for subleasing terms, conditions, and fees. In the agreement, the person who owns the property is called the "landlord.