If you want to get a zip code OR the full street name, you may want to use something like

((\d\d\d \d\d)|([A-Z,"Å","Ä","Ö"][a-zA-Z0-9,"Å","Ä","Ö","å","ä","ö"]{0,25}$))

Note that in [A-Z,"Å","Ä","Ö"], I've removed the number so when typing a full street, it cannot start with a number