Planning

Coordinating trades on an owner-builder project

Trades are independent businesses with their own schedules. Your job is to make their dates work together. The mechanics matter.

Multiple trades on site during a Queenslander build-under

Book in dependency order

Book the trades whose date dictates the rest first. On a Queenslander build-under that's the raise contractor and the certifier. Their availability gates everything downstream.

Hold dates with deposits

Verbal bookings shift. A small deposit and a written quote with a date hold the slot. Treat it as project insurance.

Handoffs between trades

The 24-48 hour window when one trade leaves and the next arrives is where things break. Walk the site between handoffs. Make sure the leaving trade has done their part to a standard the next trade can build on.

When a date slips

  1. Confirm the new date in writing.
  2. Cascade the impact downstream: which trades need to be moved.
  3. Contact the next two trades immediately. Don't wait for them to ask.
  4. Reset your buffer. If you've used your contingency week, get one back.

Communication mechanics

  • One channel per trade (SMS or email). Don't mix.
  • Reconfirm 48 hours before arrival.
  • Photograph site conditions before each trade arrives.
  • Sign-off in writing at each stage.

Tools

Use the Project Control System templates for trade contact, hold-point and variation tracking.

Related

Last updated: May 2026.
The completed Coorparoo Queenslander
How the Coorparoo raise and build-under turned out.

Coordinate without the chaos

Project Control System — $149

Trade contract template, payment tracker, hold-point logs, defects log. The admin layer that holds a multi-trade build together.

Buy the Control Pack — $149

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