If your rental agreement does not allow you to sublease, you are not allowed to sublease. Discover more answers.Subletting a rental is permitted in California if the landlord doesn't expressly prohibit it in the lease agreement. Permission Requirements: Many leases require tenants to obtain written permission from the landlord or property management before subleasing. In California, it's legal to sublet your apartment even if you're already subletting it. Commercial tenants may be evicted for nonpayment of rent, subletting the property when it is prohibited in the lease agreement and other such acts. Subleasing and Assignment. Subtenant may not lease, sublease, or assign the Premises without the prior written consent of the Sublandord. 17. California law requires tenants to seek explicit, written permission from their landlords to sublet if it is not already allowed in the lease. City law requires the San Diego Housing Commission (SDHC) to prepare a Tenant Protection.