The California sublease agreement is a legal document that binds the current tenant of a rental property (the "sublessor") to a new tenant (the "sublessee") A sublet, or sublease agreement, adds someone new to an existing lease.Usually the new person (subletter) replaces someone who is moving out. A sublease agreement is a legal document allowing existing tenants to rent out their rented space to another party, the subtenant. Tenants of residential property should prepare a sublease agreement if they are seeking to sublease a room or the entire apartment or house to a third party. A California sublease agreement is a document between a current tenant (sublessor) and a subtenant for residential use. (1992) 2 Cal 4th 342. A sublease agreement is a legal contract signed between a tenant and a third party allowing the latter to rent out the entire property or any part of it. "Homeowner" is a person who has a tenancy in a mobilehome park under a rental agreement. 798.10. As per California law, leases can indeed require tenants to obtain permission from their landlords before subletting the rental property.