Sid's House

Sid's house is the residence of the Phillips family, notably to the toys, Sid. It is located right next to Andy's house.

Sid's Room
Sid's room is a room where the Mutant toys reside. It is located just across the yard from Andy's room.

Hannah's Room
Hannah's room located down the hallway from Sid's room, is where Sid's younger sister Hannah hold tea parties with her dolls that have been mutilated by Sid.

TV Room
This is where Mr. Phillips, father of Sid and Hannah, is seen snoring on a La-Z-Boy. It is also where Buzz Lightyear finds out for himself, for the first time, that he is just a toy through the TV advertisement featuring Buzz Lightyear toys.

The Staircase
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
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.

Sid's Basement
While not seen in the film, the Tiger Electronic Games adaptation of Toy Story had a stage which featured Woody's escape from the depths of Sid's basement. Woody and Buzz must avoid Sid and Scud to get closer to finding Andy.

Trivia

 * A poster in Sid's is based on Rat Fink in his classic Hot Rod pose. The letters "HTT" are visible in the corner, presumably standing for "Hi Tech Tunes," the company that produced the film.