How do I (the master tenant) evict an illegal subtenant when he has not paid his share of the rent?

Disclaimer: The materials provided below are informational and should not be relied upon as legal advice. You need to give the tenant 3-day notice to pay rent or quit and if she/he does not cure the default, you can sue them. You should consult your own lawyer to protect your legal rights.

While the previous attorney's answer is generally correct, keep in mind that under the Los Angeles Rent Stabilization Ordinance ("LARSO") you are a LANDLORD by definition. If your subtenant gets a smart attorney, he or she might be able to beat the eviction if you haven't adhered to every provision of the LARSO. Now, this probably won't come up, but you might want to think about retaining a landlord-side eviction attorney to take care of this for you.