Legal Question in Landlord & Tenant Law in California

No he is not, because you cannot be forced to move under all but the most unusual circumstances. You should, however, make sure the landlord is making it known to buyers that you are a tenant. Other than that, which eliminates any issues of a buyer who takes title without notice of your lease, the law is clear that a buyer of a property that is subject to a lease buys subject to the lease. You, likewise, cease to become a tenant of your present landlord and immediately become a tenant of the new landlord the moment ownership transfers. So it's a good idea also to make sure your landlord transfers your deposit during the escrow or, more likely, just gives the buyer a credit in escrow for the deposit amount. The good news for you is that if the deposit is not transferred they BOTH owe it back to you (less any valid deductions).