Are the International building codes available online somewhere?

I'm in the process of building a 2-story 5-plex in Ocean Shores, WA
and the city says I have to place a staircase on the second floor
balcony ( I disagree). As I understand, you only need this second
egress on buildings 3 floors or taller. There is one internal
staircase from the 1st floor to the second floor.

Targus