next door , *
in the adjacent house
in the adjacent apartment

His practice expanded and he moved to larger rooms next door.

"Can you tell me who lives in the big brown house next door to ours?"

We all want the same things that the richer towns next door to us have.

They were running toward a car parked by an old empty house next door.

They simply wanted their game's name in brighter colors than the sign on the guy's game next door.

A similar house next door, at No. 313, is also a landmark.

The "quiet man" next door who plots against the president.

Nearly ten and still no sound of life in Luke's room next door.

His younger brother now has their parents' house next door, which is 175 years old.

From my study next door, there is no way out except through this room.