What does it mean "¿Es el apartamento de ustedes?"

[michaelbr]

I'm afraid I made a mistake here, I think the original question was "¿Es el apartamento de ustedes?" and I need to replace the pronoun "de ustedes" for possessive "su", so the new question would be "¿Es su apartamento?" Is this right?

[ROBINDESBOIS]

bad Spanish. It means your apartment.
Su apartamento.

[michaelbr]

bad Spanish. It means your apartment.
Su apartamento.
Sorry, I just realized my mistake and made the correction.