Why do you need the "be" in front of "megy" and also at the end of "épület"? Does this have a different meaning from "Az ügyvéd megy az épületbe."?
Never mind! I saw Sharmath's long answer in the discussion for "A rendőr bejön az épületbe." :)
Here is the link, for those interested:
Bemegy = comes into?
Comes into would be "bejön."