An overview of the development and costing process here Determining construction costs from the outset of your development A good summary? If not, what's missing or what's wrong with it?
Many budding developers try to go it alone and a town planner / DA consultant etc can be a very sound start point. It may eat into profit but its a sure way of be confident that the planned outcomes are costed and maximised. It also may not eat into profit. I have seen several clients maximise yield from specific personal advice using TP advice. Just watch how the project is managed. DIY under advice is cheaper than handing it over to a firm. Some consultants want more hands on than others. Important element of the process is also the finance. The standard resi mortgage broker could be out of their depth so ask q's and make sure they are right person. And never use a tied broker (ie bank)... {Pls dont post abuse people}. . If commercial lending is involved the rules change.