. that work had a proven cost and/or value.
56 For many "variation" items there was simply no attempt to grapple with these matters. For others, the attempt was half-hearted or unsuccessful.
57 The trial judge dealt with this essential part of the Builder's case in the following terms (Red 182-3):
As to whether the Plaintiff should be entitled to recover for the unapproved variations upon a quantum meruit, or unjust enrichment basis, I am of the opinion that the evidence in the Plaintiff 's case lacks sufficient cogency to enable the court to conclude that the amounts claimed represent both variations to the contract and also reasonable and proper sums for the carrying out of such variations. The evidence of Mr Bath, in relation to these matters was, in my opinion, vague and unsatisfactory and did not provide a proper basis for the conclusions contended for by the Plaintiff.
Moreover, as it seems to me, the law does not permit recovery on a quantum meruit, or unjust enrichment, basis where there is, between the parties, as there was in this case, an existing and enforceable contract, which covers the situation. In my opinion, the amount claimed in respect of unapproved variations relates to works performed within the scope of the contract in order to complete that which was contracted for. In so far as the claims, in truth, constituted "variations" as defined, then the contract provided for the authorisation of such variations, for the valuation of the work done, and for the resolution of disputes. That being so, there is no room for the application of principles of quantum meruit or unjust enrichment (Pavey and Mathews Pty Ltd v Paul 162 CLR 221 and Update Constructions Pty Ltd v Rozelle Child Care Centre Ltd (1990) 20 NSWLR 251, especially Priestley JA a t 275).
58 In my view these conclusions were entirely justified in light of the evidence and the legal principles to which his Honour refers.
59 It is true that his Honour dealt with this aspect of the Builder's case somewhat compendiously. Earlier in his reasons (Red 178-80) he had set out Mr Bath's written evidence referable to Claim Variations 92-8, stating that it was illustrative of the claims in total. It has not been suggested that his Honour was wrong in this regard, nor have paucity of reasons been raised as a ground of appeal. I have however looked at the totality of Mr Bath's oral evidence, and am satisfied that the conclusions were well open on the evidence. I am unpersuaded of any error.
60 Mr Bath's witness statement addressed Variation Claims 66-100 item by item. He was cross examined extensively and effectively on this evidence (see Black 7-98).
61 The cross-examination exposed the conceptual problems with the Builder's pleaded case, ie how it bore no relationship to the Contract as regards approved Variations (see esp Black 72-4). The cross examination also confirmed that the Builder always knew that Variation Claims 66-100 had never been admitted by the Proprietors or by Mr Moore. They were submitted after Practical Completion in an attempt to recover additional payment for contentious items, many already known to be such. As to some items, it emerged that they were repeats of previously rejected claims or were apparently doubled up with earlier claims (eg Black 30-32, 69, 71, 81-3); as to others, there was no supporting documentation (eg Black 26, 46-7, 53-4, 58, 64, 75, 80); as to most, they were submitted long after the work claimed for had been done. One item related to work for which the Architect had admitted personal responsibility (Black 27). Another related to work not yet completed (Black 34). There was no satisfactory explanation as to why requests for extra work said to have emanated from Ms Meller had not been documented by either side at the time, as had been the general practice during the currency of work (Black 8-9, 23, 41). Nor was there an explanation why the Builder had not raised its claims for payment until after the retention moneys had been divided on Practical Completion and until after (and apparently in response to) the Architect's Lists of Defects.
62 The Proprietors' witness, Mr Barber, gave cogent evidence touching a number of the items in dispute (see Blue 248-51). His cross examination did not address any part of this evidence except at a level of extreme generality (Black 123-6).