A California lease agreement allows a landlord of residential or commercial property to write a legally binding rental contract with a tenant. Upon signing, the tenant is commonly required to pay the first month's rent, security deposit, and any other fees.Our fully customizable California lease agreement template ensures you comply with California laws, save time, and gain peace of mind. How to fill out the California Residential Rental Agreement Template? 1. Enter landlord and tenant information. 2. A California lease agreement outlines the arrangement between a landlord and a tenant regarding the occupation of a property for a specified time period. Simple Rental Agreement: Our basic Lease is fillable, printable, and free.