I don’t know in Canadian French, but without any doubts, in French French it is said:

Trois mille-huit Boulevard Leblanc Bureau trois cent dix-huit

Here is what we usually say in Montreal:

52 Ste Catherine = “Cinquante-deux”

524 Ste-Catherine = “Cinq-cent-vingt-quatre”

5235 Ste-Catherine” = “Cinquante-deux Trente-cinq”

12325 Ste-Catherine = “Douze Trois-cent-vingt-cinq”

In your example, most people will say “Trente-zéro-huit”, some will say “Trois-mille-huit”, none will say “Trois-zéro-zéro-huit”