A light had appeared in the upstairs apartment on the right.

From the upstairs apartment in his parents' home, to boot?

I tried the door, then stepped back and studied the upstairs apartment to see if anyone was home.

No lights on in the back of the upstairs apartment.

He heard the word of gunfire from an upstairs apartment.

Then she heard the door of the upstairs apartment open and close.

One fire killed two elderly men living in an upstairs apartment.

They still had in their mind that the upstairs apartment got an accepted offer of only $375,000.

He just bought the upstairs apartment and is turning part of it into a gym.

Later, alone in his upstairs apartment, he wrote three letters.