First issue: limitation defence
5It was not in dispute that both water penetration into the units and the rusting of the steel roof structure were patent and known to the Owners Corporation prior to 8 February 2002. It was also accepted that both forms of damage bespoke negligence of some party. However, as explained by the referee in a part of his report adopted by the primary judge, a distinction was to be drawn for the purposes of the Limitation Act 1969 (NSW) between the visible signs, indicating a physical defect in the building, and the cause of that defect: principal judgment at [71]-[74]. Although the primary judge expressed herself as accepting the approach adopted by the referee, there were differences in the language each used to express the test to be applied. As, in my view, the appellant is correct and the wrong test was applied, it is convenient to seek to identify the test according to the statutory provision and relevant case-law, before considering the linguistic differences adopted by the appellant, the referee and the primary judge.
6Pursuant to s 14(1) of the Limitation Act , a cause of action founded on contract or tort is not maintainable if brought after the expiration of a limitation period of six years "running from the date on which the cause of action first accrues to the plaintiff or to a person through whom the plaintiff claims": s 14(1). The question is when the relevant cause of action first accrued.
7In some circumstances, the Limitation Act provides greater guidance as to the course to be taken where material facts are not known and not capable of being discovered upon reasonable inquiry for a period of time: see, eg, Part 3, Div 3, Sub-div 1, in respect of certain personal injury cases. However, in relation to buildings with latent defects, the question of first accrual depends upon principles arising under the general law.
8Where there has been negligent construction of a building, it has been held that the relevant loss accrues "when the defects become manifest or are otherwise discovered": Scarcella v Lettice [2000] NSWCA 289; 51 NSWLR 302 at [16] (Handley JA, Powell and Giles JJA agreeing). Handley JA described this principle as "orthodox doctrine in much of the common law world" and traced it to the judgment of Deane J in Sutherland Shire Council v Heyman [1985] HCA 41; 157 CLR 424 at 503-505.
9The reasoning underlying this rule is of some importance. Sutherland Shire Council involved a claim against the authority responsible for inspecting the footings of a recently constructed house. The footings proved to be inadequate and shifted, causing significant damage to the house. The inspection was claimed to have been negligent. The focus of the discussion in the judgments was on the existence or otherwise of a common law duty of care on the part of the authority. The question of damages arose in response to an argument that the only damage was economic and was not recoverable because of the constraints on such recovery under the general law. No member of the Court accepted this proposition as a basis for rejecting liability, although the reasoning varied. Deane J noted (at 504) the characterisation by the House of Lords in Anns v Merton London Borough Council (1978) AC 728, in respect of a similar claim, as being "material, physical damage, and what is recoverable is the amount of expenditure necessary to restore the dwelling to a condition in which it is no longer a danger to the health or safety of persons occupying and possibly ... expenses arising from necessary displacement": Anns , at 759 (Lord Wilberforce). Deane J rejected that classification, holding that "the loss or injury involved in the actual inadequacy of the foundation cannot, in the case of a person who purchased or leased the property after the inadequacy existed but before it was known or manifest, properly be seen as ordinary physical or material damage". As his Honour noted, the building itself was not subjected to such damage "by reason merely of the inadequacy of its foundations since the building never existed otherwise than with its foundations in that state". His Honour continued (at 504-505):
"Loss or injury could only be sustained by such a purchaser or tenant on or after the acquisition of the freehold or leasehold estate without knowledge of the faulty foundations. It is arguable that any such loss or injury should be seen as being sustained at the time of acquisition when, because of ignorance of the inadequacy of the foundations, a higher price is paid ... than is warranted by the intrinsic worth of the freehold or leasehold estate that is being acquired. Militating against that approach is the consideration that, for so long as the inadequacy of the foundations is neither known nor manifest, no identifiable loss has come home: if the purchaser or tenant sells the freehold or leasehold estate within that time, he or she will sustain no loss by reason of the inadequacy of the foundations. The alternative, and in my view preferable, approach is that any loss or injury involved in the actual inadequacy of the foundations is sustained only at the time when that inadequacy is first known or manifest. It is only then that the actual diminution in the market value of the premises occurs."
10Two points may be noted about this analysis: first, what needed to become manifest was not any legal responsibility for the cause of the defect, but the actual physical defect in the structure. Thus, the loss in value of the premises was triggered by knowledge of the inadequacy of the foundations, being a physical defect, not by knowledge of who, as between the architect, engineer, builder or inspector, may arguably have been responsible for the defective work. Secondly, the reasoning left open questions as to when a particular defect becomes "known" or "manifest". That issue did not need to be addressed in Sutherland Shire Council , because the reasoning was concerned with the nature of the damage, rather than the time at which it actually occurred.
11The reasoning set out by Deane J is unlikely to have been seen at the time as controversial. As noted by Brennan J in Hawkins v Clayton [1988] HCA 15; 164 CLR 539 at 561, "[t]here is no doubt that most causes of action for negligence first accrue when the plaintiff first suffers damage caused by the defendant's breach of duty", referring to Cartledge v E Jopling & Sons Ltd [1963] AC 758. Indeed, his Honour referred to Sutherland Shire Council as a case illustrating the difficulty in applying the rule, not by way of an exception to it.
12The issue in Hawkins was somewhat different: the breach of duty was that of a solicitor who failed, for more than six years, to locate the named executor and inform him of the will. During that period, the main asset of the estate, a house, fell into disrepair. The executor (and beneficiary) contended that the cause of action against the solicitor did not run until he discovered, or could on reasonable inquiry have discovered, that the damage had been sustained: p 587. Reliance was placed on a decision of the Canadian Supreme Court in Kamloops v Nielsen [1984] 2 SCR 2; 10 DLR (4 th ) 641. Deane J rejected the submission that Kamloops supported such a broad proposition, noting at 587-588:
" Kamloops ... was a case where economic loss had been sustained as a consequence of the development of a latent defect in a building. Commonly in such cases, the building never existed and was never owned without the defect and (in the absence of consequential collapse or physical damage or injury) the only loss which could have been sustained by the owner was the economic loss which would be involved if and when the defect was actually discovered or became manifest, in the sense of being discoverable by reasonable diligence, with the consequence that the damage was then sustained by the then owner: cf Sutherland Shire Council .... The position is different in cases where all or some of the damage, be it in the form of physical injury to person or property or present economic loss, is directly sustained in the sense that it does not merely reflect diminution in value or other consequential damage which occurs or is sustained only when a latent defect which has existed at all relevant times becomes manifest. In those cases, damage is sustained when it is inflicted or first suffered and the cause of action accrues at that time."
13This analysis leaves open a critical question: a structural defect may reveal itself over time, progressively. The first indications may be minor cracking requiring superficial repair, whereas the underlying problem requires far greater expenditure, assuming it to be capable of correction. If the superficial cracking should put the owner on notice of inquiry as to its cause and if reasonable inquiry would have revealed the cause, the underlying defect has become manifest, even though it did not in fact become known to the owner at that time. In Sutherland Shire Council, Deane J had described as "consequential damage" the physical effects on the fabric of the house caused by movement resulting from the inadequate footings. (The courts below had not permitted recovery on that account.) His Honour stated (at p 512):
"It seems to me, as at present advised, that any such consequential damage to the building itself resulting from inherent defect in the foundations is properly to be seen as falling within the same category as the damage involved in the inadequacy of the actual foundations, that is to say, as economic loss sustained by reason of the erection or purchase of the unsound building."
14Describing damage as consequential invites the question, consequential upon what? Given the context, the answer must be consequential upon the inadequacy of the footings. In other words, the damage, whether appreciated at the time or not, constituted a physical manifestation, as later proved, of the structural defect. The ambiguity in his Honour's language may be identified in the following way. On the one hand, a defect may be manifest before any physical damage eventuates. For example, the inadequacy of the footings may become known upon inspection by a prospective purchaser. In that case, the economic loss will accrue prior to the damage. That is one operation of the concept of a latent defect becoming known or manifest. The other possible operation is where the physical damage accrues first, but it is not known nor manifest that that damage is a result of the latent defect. In this latter case, it is the underlying cause of the damage which is neither known nor manifest. What is unclear is whether Deane J intended to encompass both cases within his explanation. The first would involve no departure from the ordinary principle of accrual of a cause of action in negligence; the latter would.
15This issue arose for determination in Pullen v Gutteridge Haskins & Davey Pty Ltd [1993] 1 VR 27. The Appeal Division of the Victorian Supreme Court (Brooking, Tadgell and Hayne JJ) considered the issue in relation to damage suffered by the State Swimming Centre in Melbourne. The Centre was built, with inadequate footings, on silt known to be liable to settlement and compression. The proceedings were brought by the owner (the State of Victoria) against the engineer which prepared designs and specifications for the project. The proceedings were commenced some nine years after work began and seven years after practical completion. The limitation period for a cause of action in negligence was six years. The Appeal Division identified the question at 65-66:
"The cause of action being for negligence, it is not complete until damage not negligible is sustained by the plaintiff. The question is when in contemplation of law damage is first sustained in a case like the present. The respondent says that damage is sustained as soon as physical damage is done to the structure .... The appellant contends that in a case like the present damage is not sustained, and so time does not begin to run, until either the latent defect in the building is actually discovered or it becomes manifest in the sense of becoming discoverable by reasonable diligence. The judge accepted the appellant's submission here but found that the appellant had in fact discovered 'the defects and damages flowing therefrom' more than six years before the commencement of the first action."
16The Appeal Division considered in detail the reasoning of Deane J in both Sutherland Shire Council and Hawkins . Their Honours accepted that in the latter case his analysis had the support of Mason CJ and Wilson J and therefore constituted a majority view (although Mason CJ and Wilson J dissented in relation to an earlier issue and therefore did not, strictly speaking, need to consider the further issues). They also addressed the way in which Deane J had discussed "consequential damage" in both Sutherland Shire Council and Hawkins . Their Honours emphasised the passage in Sutherland Shire Council which appeared to equate "consequential damage" with diminution in value resulting from a latent defect, rather than as a form of physical injury to property, in the passage set out at [13] above: Pullen at 69(10)-(15).
17One difficulty with that reasoning is that the passage appears to treat the diminution in value and the consequential damage as occurring or being sustained only when the latent defect becomes manifest. It is doubtful whether Deane J was addressing the question of actual physical damage which occurred prior to the time when the latent defect became manifest, the physical damage itself not being a relevant manifestation because it did not put the owner on inquiry as to its cause. However, Pullen is authority for the proposition that even where actual damage caused by the latent defect in the building has been suffered more than six years before the commencement of the litigation, the cause of action does not accrue until the link between the physical manifestation and the underlying defect is known or ought to be known. Such a principle would constitute an exception to the rule that a cause of action in negligence accrues when material damage is first suffered.
18The potential consequences of the exception require consideration. For example, it is quite possible that damage to the fabric of a building might be repaired by the builder, at its cost, because the cause (inadequate design) was not then identified, and was not then reasonably capable of identification. In such circumstances, the builder would not have joined the architect or engineer responsible for the design. When, more than six years later, the real problem becomes manifest and the architect or engineer is sued by the owner, would the builder be allowed in to recover from the architect the cost of the earlier repairs, even though that cost did not constitute damage for which the owner later sued?
19Despite considerations of this kind, it is necessary for this Court to follow the decision of the Appeal Division in Pullen , unless satisfied that it was clearly wrong. Not only is it not clearly wrong, but it is not necessarily wrong in any sense: all that can be said is that it appears to involve a development of the general law which may not find unequivocal support in the authorities upon which it relied. For reasons explained below, it will not be necessary to determine this case by reference to the extension to common law principle accepted in Pullen .
20As noted by the primary judge at [70], there has been consideration of what is to be treated as a "latent defect" in this context: see Owners of Strata Plan 50946 v Multiplex Constructions (NSW) Pty Ltd [2006] NSWSC 377 at [20] (White J). His Honour expressed the following view:
"In my view, there is no additional requirement that in order for a defect to be latent it must not be visible, or must be concealed or hidden, although, of course, a defect which is visible and not hidden may be manifest in the sense of being discoverable with reasonable diligence. Moreover, a defect may be, and often will be, different from the physical thing which may be observed. For example, there may be a latent defect in the design of a building where a temporary external wall is too thin to carry a load, even though the thickness of the wall and the size of the roof it carries is plainly visible."
21The critical passage in the reasoning of the referee, which was accepted by the primary judge as revealing no error appeared at [316] of his report. That paragraph considered a submission put on the part of the appellant that the window units themselves, which were said to be defective, had operated in the same way since the time of their installation and that "any defect with the specification must have manifested itself when signs of water first appeared on the sills of the windows": set out by the referee at [315]. The referee continued at [316]:
"In my view this submission ... does not state the correct test, and it glosses over the distinction between the visible signs and the cause of those signs, or to put the same thing in other ways, the distinction between the fact that physical defects were known, and the fact that those defects were due to the design of CSA, or between the symptoms of a disease and the diagnosis of the disease."
22In upholding the referee's approach, the primary judge stated at [73]:
"I do not agree with CSA's submissions that the Referee has stated a test in which it must be demonstrated that any defects identified were due to the act or omission of the alleged tortfeasor. The Referee was doing no more than applying what had been said in the line of authority to which he referred. The present case is not dissimilar to the facts in Pullen. In Pullen there were observable physical symptoms or defects such as a large horizontal gap, which had opened up in the north wall about one metre above the ground. However the latent defect was the inadequacy or unsuitability of the footings. Although the physical defect was observable, the latent defect of inadequacy of the footings was not discovered until a later time. In this case the physical defect, the cracking in the walls and ingress of water was observable, but the latent defects, the faulty design of the windows and the inappropriate rendering over the control joints inconsistently with the design as specified in the Handbook, the specifications and the drawings were not identified until after 8 February 2002."
23The issue in these proceedings cannot be determined by a factual comparison with the circumstances in Pullen . A number of points of distinction are significant. Practical completion of the State Swimming Centre was achieved on 4 September 1980. The six year period prior to the commencement of proceedings began on 8 April 1981. Accordingly, the cracking and leakage from the pool of which the claimants were aware, and which demonstrated inadequacy of the footings, needed to occur within that period. (There was no suggestion that they should otherwise have known of the inadequacy of the footings at that stage.) However, there was an expectation that the structure would settle and, accordingly, that some cracking might be perceived regardless of the adequacy of the footings. Further, and importantly for the assessment of the facts made by the Appeal Division, an internal memorandum of the respondent of 3 May 1982 was found to be "the first written material relating to faults allegedly due to differential settlement": p 82(35).
24The primary judge stated that "the physical defect, the cracking in the walls and ingress of water was observable, but the latent defects, the faulty design of the windows ..." were not. This approach takes the test one step further than Sutherland Shire Council, as explained in Hawkins, and Pullen . Those cases are authority, at most, for the proposition that it is the physical defect which must be known or manifest, not that the cause of the defect must be identifiable. The relevant defect in the building was not the design, installation or inspection of the windows, but the windows themselves. Once it was appreciated that the windows themselves were defective (in that they were not adequately watertight) the defect was known. The physical consequence of the defect, namely the ingress of water, was not itself the defect, although it might well have been sufficient to lead a reasonable person to make inquiry and thus discover the defect. In this respect, there is an important distinction between a case of water penetration into a room, where the point ingress can readily be investigated, and the adequacy of footings or foundations to a building, which can often only be inspected with difficulty: cf Strata Plan 50946 v Multiplex, above at [21].