cater-corner

Of or pertaining to something at a diagonal to another; of four corners, those diagonal to another.

The Empire State Building and the old Altman's Department store are catercorner, at Fifth Avenue and East 34th Street, with the ESB at the southwest, and Altman's at the northeast.

From my living room, I trained my binoculars on the redbrick monstrosity catercorner from me.

Uneven, not square, as mislaid stones or people with a limping gait.

Diagonally across from.

Altman's is sited catercorner to the ESB.