(1) identifies the sub-contract;
(2) identifies the obligations of the sub-contractor under that sub-contract;
(3) alleges that the sub-contractor performed its obligations (or purported to do so) under that sub-contract; and
(4) alleges a number of matters that are said to give rise to the conclusion that the sub-contractor should have known that "the owners" of the particular development and its successors in title "would be reliant upon [the sub-contractor] to properly perform the work in accordance with the terms of the sub-contract...or otherwise with due care and skill", and that accordingly those owners and their successors, "would be vulnerable to suffer loss and damage if [the sub-contractor] did not properly perform its work...".
7 In those circumstances, it is alleged that it was reasonably foreseeable to the sub-contractor that if it did not perform its work in accordance with the terms of the sub-contract, or with proper care and skill, then that would, or might, cause loss to the owner of the building in question and its successors in title.
8 It is also alleged that the relevant plaintiff was more vulnerable than most successors in title to suffer loss by reason of any breach of duty on the part of the sub-contract because, the strata plan not having then been registered, the relevant plaintiff did not exist. That, I think, is intended to pick up the relevant plaintiff's articulation as against the defendant of the reasons for which it was owed a duty of care, even though it was not the person for whom the defendant carried out the work.
9 There is no express allegation that, by reason of the matter that I have summarised, the sub-contractor owed "the owners" a duty of care. It is however, alleged, that by reason of those matters, it owed the relevant plaintiff a duty of care: a duty of care to use reasonable care to prevent economic loss arising from defects and to carry out the sub-contract with reasonable care and skill.
10 The question is whether a pleading in the form that I have summarised is sufficient to demonstrate what is necessary to show a duty of care between a sub-contractor and a subsequent owner (or, in another case perhaps, between a head contractor and a subsequent owner). As Byrne J pointed out in Gunston, there is no general principle of law that a sub-contractor cannot owe a duty of care to a principal. However, his Honour said, the duty of care will arise only if there is reliance or vulnerability on the part of the principal. It seems to me that what his Honour said must be equally applicable as between a sub-contractor and a successor in title of the principal.
11 In the present case, although there is no express allegation of the conclusion of law that the sub-contractor owed "the owners" a duty of care by reason of the matter pleaded, the material facts that would support the existence of such an allegation are set out. I do not think that it can be said at the level of principle or on some a priori basis, that if evidence were led to make good the matter pleaded, nonetheless, as a matter of law, there could be no duty of care owed by the sub-contractor to "the owners".