Embrace subletting in California! Know your rights, follow guidelines, and have a solid sublease agreement.Tenants who want to sublet their apartments would be wise to draw up a subletting agreement for the new tenant to sign. In Riverside state of California, can I do a lease on my tenant or do I have to do a month-to-month contract rent? If you find yourself unable to fulfill a lease agreement for a Riverside rental, you might have the option to sublet. A sublet, or sublease agreement, adds someone new to an existing lease. Usually the new person (subletter) replaces someone who is moving out. No information is available for this page. A tenant can sublet without the landlord's permission, even if the lease says its forbidden. Here's some language for a sample letter requesting sublet permission.