17 This paragraph of the letter of 2 July 1997 makes it crystal clear that the referee understood that a reasonable profit margin was to be added after costings had finally been determined. That same paragraph shows the referee and Mr Zacos effectively indicating to the parties their expert opinion that a reasonable margin of profit to be added thereto was 10%, subject to any further evidence or submissions the parties might make.
18 Later in the letter the referee reminded the parties "that the basis of the claim is 'quantum meruit' and not 'cost plus'." This distinction between "quantum meruit" and "cost" is repeated in par 5.12 of the referee's Report. The respondent submitted before us that this is evidence that both Mr Zacos and the referee appreciated that the costings in the Preliminary Assessment of Costs already included some profit margin and that what was being ascertained by Mr Zacos was the value to the builder of the work done. This misunderstands the point that the referee was making. What he was emphasising was that the builder was not entitled to its actual expenditure plus some margin. In the final analysis, the builder was only to be allowed what it deserved ("quantum meruit"), whether or not the builder had already spent a particular sum. It was already common ground between the parties that the builder would be entitled to items of work at units of cost as determined in each case by Mr Zacos, provided that Mr Zacos' findings and costings were ultimately accepted by the referee.
19 The parties effectively submitted to Mr Zacos' expertise, subject to the parameters recorded by the referee in his Report. But the parties were free to do this; as was the referee so long as he did not abdicate ultimate responsibility for his Report. The referee had broad powers as to the manner in which he was entitled to conduct the inquiry (see District Court Rules, Pt 28B r7). Mahoney DCJ recorded that neither party complained about how the reference had been conducted, each having been legally represented throughout the inquiry.
20 Each party then made submissions in writing about Mr Zacos' Preliminary Assessment of Costs. The respondent's submissions were in the form of a statement from its expert architect Mr Cusick. The appellant's were in the form of a statement of its principal Mr Gray. Mr Zacos considered this further information and produced a Supplementary Report. He accepted some of the additional items claimed by Mr Gray and some of the additional reductions claimed by Mr Cusick. Where appropriate, he costed the relevant item. Where no separate costing exercise was appropriate (as with most subparagraphs in par 4 of Mr Gray's statement) he made no separate adjustment or allowance.
21 In his Supplementary Report, Mr Zacos accepted and costed items totalling $88,684 from Mr Gray's statement, including "Quantification of 12 week Delay" (cf par 5 of that statement: CB 68) in the sum of $28,800. Once again, nothing on the face of the Supplementary Report indicates that Mr Zacos misunderstood his task or included a profit margin in his costing of individual items.
22 The Supplementary Report was tendered in the inquiry, the referee noting that Mr Zacos had "costed each of the items in Mr Gray's supplementary statement and each of the items in Mr Cusick's supplementary statement" (p425, emphasis added).
23 Later in the inquiry, the parties briefly debated the profit margin and agreed to accept the rate of 10% suggested in the letter of 2 July 1997 (pp436-7). The referee's reference in the transcript to "the 10 per cent margin that Mr Zacos allowed" suggests that Mr Zacos had been the initiating party in what the referee described in his letter of 2 July 1997 (par 16, above) as derived from "using our expertise".
24 The parties, the referee and Mr Zacos clearly understood that the proper time to factor in the profit margin figure was after all of the details of costing were worked out to the referee's satisfaction. It was never put to the referee that the Zacos' schedules already included the profit margin for the simple reason that everybody participating in the inquiry knew that this had not occurred.
25 The final Report of the referee is equally clear in its intent in this regard. Nothing suggests that the experienced referee was intending to allow the builder to double dip by allowing the builder's 10% profit margin to be built into the Zacos costings and the final adjustment of the quantum meruit figure.
26 Part 5 of the Report explains how the referee valued the builder's quantum meruit claim. It explains that the "margin to be added to the net value for profit" was as determined by the referee and notified in his letter of 2 July 1997 (par 5.3). Succeeding subparagraphs detail the role taken by Mr Zacos and the parties' involvement in what became Mr Zacos' supplementary report (pars 5.4-5.11). The referee accepted Mr Zacos' costings. In deference to an argument faintly advanced by senior counsel for the respondent, I indicate that nothing betrays improper abdication of responsibility by the referee. His powers are broad. And pars 5.11 and 5.12 of the Report show his awareness of the need to form an independent judgment with respect to Mr Zacos' input.
27 The reasoning in the Report is not extensive, but it betrays no error of law on that account especially when regard is paid to (a) Mr Chapman's role as an expert referee; (b) the matters put into issue and the matters agreed upon between the parties during the course of the inquiry; (c) the agreement of the parties to accept Mr Zacos' assessments and costings subject to specific matters of complaint; and (d) the incorporation into the Report of the two sets of costings by Mr Zacos, the latter itself incorporating by reference information from the Gray and Cusick statements.
28 In his Report, the referee effectively subdivided Mr Zacos' Supplementary Report. This reflected the way the parties had segregated issues relating to the builder's claim based on "delay, sequencing problems and variations" (cf Report par 5.5).
29 The referee dealt firstly with the particular items of addition (Gray) and deduction (Cusick) advanced by the parties that were considered and costed by Mr Zacos. He accepted Mr Zacos' recommendations, for reasons set out in pars 5.6-5.12, 5.14.
30 Secondly, the referee addressed "the claim for delay costs" (par 5.13). He noted that Mr Gray had claimed a delay of twelve weeks. For this item, the referee allowed allowed $14,400. In various places the claim is described as one based upon delay. In truth, it was a claim by Mr Gray that various delays as set out in par 4 of his statement caused an additional 12 weeks construction time for which the appellant claimed the cost of its labourers (plus profit margin). See par 5 of Mr Gray's statement (CB 68). Mr Zacos quantified the 12 week delay in money terms at $28,800 and the referee allowed the appellant one half of this claim. Mr Gray had been cross-examined on his statement and, in the light of that cross-examination, it is clear that the referee thought that the builder bore responsibility for half of the claimed delays.
31 In reporting his partial acceptance of this delay claim the referee was in no way proposing an award of damages for breach of contract (as the respondent submitted). The sum allowed was the cost of the site leading hand and the site labourer at the rates specified by Mr Zacos (RB 42) for the number of weeks during which work was actually done additional to the duly costed work for specific items, being additional work (to the extent determined by the referee) caused by the type of unnecessary variations detailed in par 4 of Mr Gray's statement.
32 The referee concluded his analysis of the quantum meruit valuation exercise in the following terms: