Developer or Builder - Who is Responsible

It would be the builder not developer. Once the developer sells it is hands off. The builder is primarily responsible for any screw ups and so is the building surveyor when u get the occupancy permit. It is for them to do the due diligence. Take the recent case of the apartment tower in Docklands that was due to non- certified cladding. It was due to builder who
Sourced those materials.

Similar to electric and and plumbing - if it is not certified products the plumber would not install it as the onus is on him to ensure they are up to Australian standards.

The only case I know in vic was when a developer sold off the plan different finishes colours as per the plans or difference in design then the developer got sued

 

Not legal or accounting advice, but maybe it could be done this way:

ABC Pty Ltd trustee for Project 1 Unit Trust to purchase development site and develop site.

By all units in the trust with XYZ Pty Ltd

On completion dispose of the unit trust, complete tax return by XYZ Pty Ltd and then commence Project 2 unit trust with after tax profits.