When you consider:
starts are often 6 to 12 weeks after approval;
no-one starts in late November or December due to industry shutdown
everyone is on Holidays 4 weeks
January - March quarter is often high. March to June may show a difference but assuming a 12 to 15 week build time then...
As an exbuilder myself I agree totally with above. Steel is up what 70%, waste dumping in sydney 20%, copper, plastics, travel costs.
I build commercial now and I don't anyone sitting around as all good tradies /techs are in huge demand.
Peter