Legal Question in Landlord & Tenant Law in California

Yes, but unless you have an unexpired lease you are only entitled to quiet enjoyment for 30 days at a time. The landlord is free to change the terms of the rental agreement or terminate it at any time on 30-days notice, or 60 if you have been a tenant more than a year. You may, however, have special rights not avialable state-wide, under San Francisco's rent control ordinances. You should check with one of the many very good (ie, agressive) tenants rights groups that exist in S.F.