Admissions - S4-E17
Continuity mistake: When Joey and Dawson are talking at her house before the party, there is a shot of Joey with her hair swept back behind her right shoulder, and the ends curled up as if blown by the wind. She says, "Doing what?" Then the next shot of Joey, as she says "I know," her hair is suddenly completely down around her face, in front of both shoulders, and not curled up on the ends or wind blown. Then the next shot of Joey when she says, "Oh it was nothing, it was great," her hair is once again swept back behind her right shoulder, and curled up on the ends from the wind.
Answer: It's the same apartment Joey had in NYC. Comparing it to the beginning of the Finale; you can tell it's exactly the same location, furnishings, Plasma TV etc. Apparently Chris was only living with her at HER apartment, and now Pacey has taken his place at the end. I guess this implies Pacey successfully started his own restaurant business in NYC as he had dreamed, to be with Joey.