Both Raj's and Bernadette and Howard's apartment are filmed on the same set and are just completely redecorated to change scene, this is why it is rare to see both apartments in one episode.
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Things You Didn't Know About The Big Bang Theory
FanfictionHere are some mind-blowing facts that you probably didn't know about The Big Bang Theory.
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Both Raj's and Bernadette and Howard's apartment are filmed on the same set and are just completely redecorated to change scene, this is why it is rare to see both apartments in one episode.