Continuity: In the first season of House, House lived on the 4th floor of an apartment building. When Cameron comes to House's apartment, the entry is on the farthest right wall. In further seasons his apartment has a first floor external shot. The entry door is on the left wall and the layout is different. In season 5, Wilson mentions to House that he doesn't like change and has lived in the same apartment for 15 years.
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