The Apartment, in which the address is 123 Sedertmille Street, is where 123 Slaughter Me Street takes place. It has seven floors and various rooms, with some of them having hidden relics inside. After beating the game, the entire apartment burns down.
The Apartment is a large building with seven floors, numerous rooms and no lights. There is garbage scattered throughout, as well as words written in blood on the walls. It also seems that the Apartment has a huge, glass roof in the center. It has tile floor and the wallpaper has rotted away, revealing dirty brick underneath.
A gif of the current apartment