Sid's house is the residence of the Phillips family, notably to the toys, Sid. It is located directly next to Andy's house.
Sid's room is a room where the Mutant toys reside. It is located directly across the yard from Andy's room. It is littered with many disturbing musical posters, many "toy torturing" tools, a lava lamp with toys heads instead of bubbles and many other disturbing features. In fact, as soon as Woody saw what was in this room, he felt convinced he and Buzz were going to die.
Hannah's room located down the hallway from Sid's room, where Sid's younger sister Hannah holds tea parties with her dolls that have been mutilated by Sid.
This is where Sid's Dad
is seen snoring on a La-Z-Boy. It is also where Buzz Lightyear finally discovers, that he is just a toy through the TV advertisement featuring Buzz Lightyear toys.
This is where Buzz Lightyear, after watching the commercial, falls and has his left arm dislodged when he attempts to fly for the last time. At one point, Scud is seen snoring on the staircase, blocking Woody and Buzz's way out of the house.
The backyard of Sid's house is first seen when Sid blows up a Combat Carl toy. Later on, it is where Woody and the Mutant toys escape to teach Sid a lesson and to rescue Buzz from being blown up by Sid.