Legal Question in Real Estate Law in California

Re: Landlord Tenant

I don't think there is any way; eviction is a process set up by law for someone with a superior right of possession lawfully to dispossess someone with an inferior right, such as a landlord has against a defaulting tenant or a tenant has against a defaulting subtenant. The rights of cotenants are equal. You can probably sue the non-paying cotenant for breach of a contract with you to pay half the rent, but I don't think your rights extend to terminating the landlord-tenant relationship between the cotenant and the landlord.