pozadi

1. behind; at the back; in the rear
   Deca sede pozadi, a ja vozim. — The kids sit in the back, and I drive.
   Ulaz je pozadi, sa druge strane zgrade. — The entrance is at the back, on the other side of the building.

2. (+ gen.) behind
   Parking se nalazi pozadi zgrade. — The parking lot is behind the building.

As a preposition, iza is more common: iza kuće.