‘X zài Y duìmiàn’ (X is opposite (to) Y) (e.g., Tíngchēchǎng zài shǐguǎn dàlóu duìmiàn.) (The parking lot is opposite the building of the embassy.): The compound position noun ‘Y duìmiàn’ (opposite Y) refers to the space projected outward from the front of the reference object, and the located object is situated facing or almost facing the reference object, so that the greater part of the space is between the two objects.
Wǒ de wòshì duìmiàn shì xǐzǎojiān.
(Opposite my bedroom is a bathroom.)
Duìmiàn shì Běijīng Dàxué.
(Opposite (to us) is Beijing University.)
In (1a), the two rooms are so situated that they face each other. In (1b), ‘duìmiàn’ (opposite) is located from the standpoint of the speaker.
 Loar, J. K. (2011). Chinese syntactic grammar: functional and conceptual principles. New York: Peter Lang.