The Positives:
The primary benefits to purchase off the plan are;
1) No need for physical inspection of the property as unit is brand new,
2) In some states there are considerable stamp duty incentives/discounts (such as Victoria),
3) In a rising property market the purchaser could see considerable gains in property values before completion/settlement with some purchasers even on-selling prior to settlement turning a quick profit,
4) Some developers will offer guaranteed rental returns for a year or two post completion,
5) Tax benefits with purchasing brand new.
The Negatives:
The main risk when purchasing off the plan is arranging home loan finance. No lender will agree to approve a home loan for an indefinite period of time with the maximum approval period being six months. As a lender will only hold a full unconditional home loan approval open for 6 months, it is impossible to get approved unconditionally for an off the plan purchase because any approval is going to expire by the time settlement is due.
Therefore, the purchaser runs the risk that when settlement is due the bank will not lend the home loan finance because;
1) Valuations have fallen and the purchaser does not have sufficient funds to make up the difference (many off the plan buyers had this issue in 2010 where some areas suffered a fall in property prices),
2) Credit policy has changed resulting in the particular property or applicant being no longer acceptable to the lender (very common during the GFC where banks tightened their credit policy),
3) Interest rates have risen in conjunction with exchange rates worsening for Australian citizens overseas resulting in a reduced borrowing capacity and inability to afford the repayments.