[sarasi]

If you are writing in romaji, the standard is to write it this way:

xxx Name of building (xxx=apt number)
3-16-37 Nishida
Ward or city name
Prefecture xxx-xxxx (=postal code)

Here is a random example from the internet, slightly adjusted:

302 Akasaka Twin Tower
2-11-7 Akasaka
Minato-ku
Tokyo 107-0052