Home Extensions For Every New Room And Bathroom Builtand Kitchen How Much Does It Cost In Australia

i would like a rough idea please base is Australian Labour and Materials and the Price is based EACH EACH Things eg average room size Would Cost So Much So Much $ $ $ $ kitchen bathroom

When Giving Estimates me i am Asking For Something simple and presentable Basically it was not fancy scale of 1 to 10 Everything Has to Be a 5

thank you