Legal Question in Landlord & Tenant Law in California

First, a security guard does not have the right to enter your apartment without prior notice, and/or in the case of an emergency involving damage to property or threat of harm to someone's person. The security guard has no greater rights than your landlord. Noise is not a basis for him to enter your apartment. Are you violating your lease by having guest - I doubt it. Ask the property management company to point you to where in your lease, or in rules and regulations you agreed to limit the number of people in your apartment. Noise is a separate issue - if you are being unreasonably noisy, then it is a "nuisance" and that can be a violation of your lease, as well as grounds to terminate your tenancy. The security guard, irrespective, cannot force people out of your apartment - that is essentially a forceable detainer, which is illegal. He can call the policy and file a report, and you may get a notice from your landlord, but that's about as far as he can go.

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