This is just to emphasize what cvillecpm said. Los Angeles does have some special laws in the rent control area to allow owners to move back into their houses. So, if the owner was just trying to get you out early, that would probably be illegal. But if they are doing it so that they can move back in, it might not be. The law might require them to offer you some sort of financial recompense, but I am not sure on that.
And a quick google turns up this:
LA City Housing Law: Evictions
A landlord may bring an action to recover possession of a rental unit only upon one of the following reasons:
8. The landlord seeks in good faith to recover possession of the rental unit for the use and occupancy by the landlord, or the landlord's spouse, children, or parents, provided the landlord is a natural person, or for a resident manager.
Reasons 8,9,10,11 in the list above require the approval of the Rent Stabilization Division. A landlord in all those cases must fill in a form and file it with the division.
For reasons 8,9,10, 11 a copy of the appropriate declaration must be served upon the tenant or on before the date in which the tenant is given a 30 day notice to quit. Also for all of these evictions, relocation assistance is required to be paid by the landlord within 15 days after the service of the notice.
So it appears that yes, they can ask you to leave, and they only need to give you 30 days notice. But they do need to pay you something, which is probably specified in the law. And a further quick google gets me:
Monetary relocation assistance is available to eligible and qualified tenants.
Qualified tenants are those who are 62 years or older, handicapped, or disabled, or who have one or more minor dependent children.Qualified tenants are entitled to receive $5,000.
All other tenants are eligible, and they are entitled to receive $2,000. These amounts are paid per unit, not per tenant.