32 Two things can be said at once about this evidence. First, it was given in elaboration of Mr Norris' view as to the value of the premises as damaged. The question in context gave no warning to any party that the answer might offer a springboard to the appellants to depart from their case in relation to valuing the months of lost occupation of Wentworth Avenue. Secondly, the answer was an extrapolation of a rental value derived from the sum realised in February 1989 from the sale of the (damaged) premises by auction. That figure was $6.075m. There were obvious difficulties in projecting this figure back to November 1987, particularly when it is noted that Mrs Sweeney had purchased Wentworth Avenue in April 1986 for $1.55m. It is inconceivable that this matter would not have been explored had the appellants signalled the use to which they wished to put the answer.
33 Mr Norris was asked no further questions on this issue either by Mr Corsaro or by counsel for the appellants who cross-examined him briefly. No other party questioned him.
34 In final addresses before the referee the appellants propounded for the first time an alternative basis for calculating the value of the lost use of the Wentworth Avenue premises. In the words of counsel for the appellants in the reference, the alternative basis "[had] been provided to us by the kindness of Mr Corsaro" (AB 767). He referred to the answer that I have set out above. It was contended that this material could be relied upon, notwithstanding the particulars in the pleadings. Reliance was placed upon Dare v Pulham (1982) 148 CLR 658.
35 Mr Corsaro sprang to his feet, asking whether the appellants were seeking to amend their summons. Counsel for the appellants in the reference (Mr Dowdy) indicated that he did not seek to amend, but that he relied upon the principle in Dare at 666. The referee indicated that he was unimpressed with this late attempt to change this aspect of the case (AB 768-9). There was further discussion along the same lines later in addresses (AB 841-2).
36 In his report, the referee awarded, for this component of the appellants' loss, the rental lost from the premises at Wunulla Road Point Piper, amounting to $97,200 (AB 1619-1621). He rejected the appellants' attempt to extend this claim by reference to the abovementioned evidence of Mr Norris. The learned referee described the particular answer given by Mr Norris as having been given without adequate consideration. He also appears to have thought it appropriate that the appellants should be held to the claim as particularised, describing it as reflective of "the reality of the situation". The precise reasoning is a little unclear although the referee distinguished the case before him from "The Mediana" which was the principal authority relied upon by the appellants. There was a passing reference to "the requirements of justice" (AB 1620) which suggests that the referee had concerns stemming from the way the case had been fought before him on this issue.
37 It is in my view significant that, when the matter came before Hidden J, the appellants made no attempt to tender further evidence on this issue. I am not saying that they would have been entitled to do so. But it is sufficient to observe that they did not. The matter was argued on the basis that Hidden J should reject this portion of the referee's report and substitute the figure of $180,000 (ie 9 x $20,000) simply on the basis of Mr Norris' evidence.
38 Hidden J considered the circumstances in which Mr Norris gave the answer that he did, and in which the appellants sought to rely upon that evidence in final addresses before the referee.
39 His Honour detected no error in the approach adopted by the referee. As I read the judgment on this point, it stands on two separate bases.
40 The first basis related to the manner in which issue had been joined before the referee. The new claim had never been particularised notwithstanding numerous applications for amendments. Hidden J distinguished the present case from Dare v Pulham because the evidence of Mr Norris had been led by counsel for the architect without objection on behalf of any other defendant and in circumstances where it was not foreseen as the foundation for a claim for damages in a higher amount and on an alternative basis to that which had previously been particularised.
41 Secondly, Hidden J held that the referee had correctly distinguished The Mediana.
42 His Honour's reasoning on the latter point was challenged by senior counsel for the appellants. I think there is considerable force in that challenge (cf Clerk and Lindsell on Torts, 17th ed para 27-61). But it is unnecessary to address the point further because I agree with his Honour on the first point and because an appeal lies from an order and not merely from the reasoning upon which it is based.
43 An application to adopt a referee's report is not an appeal by way of rehearing. The principles are different. Nevertheless, it was in my view entirely appropriate for Hidden J to have regard to the way in which the proceedings had been conducted before the referee and the absence of any new material on the critical topic in the evidence placed before him. (I am not inferring that it would or would not have been proper to have received additional evidence on this point.)
44 The second ground of appeal fails.
The burden of the engineer's costs
45 The third ground of appeal challenges the trial judge's refusal to make a Bullock or Sanderson order in relation to the engineer's costs, which his Honour ordered to be paid by the appellants.
46 The referee indicated that he had not heard argument on the topic. Nevertheless he expressed the view that there was no basis for ordering that the appellants receive indemnity in relation to costs ordered to be paid to the engineer "against whom there was no evidence at all".
47 The matter was debated before Hidden J on the basis of acceptance of the principles discussed in Gould v Vaggelas & Ors (1985) 157 CLR 215. Hidden J concluded that the referee's finding that there was no substance in the allegations of negligence against the engineer was clearly well open to him, and that it was not reasonable for the appellants to have joined the engineer as a defendant. He held that the engineer's cross-claims against the contractor and the architect did not alter the position.
48 The appellants submit that additional matters should have been taken into account: namely, the presence of the engineer when the hole in the roof was made, the absence of the appellants on that occasion, and the fact that the architect and contractor denied any liability to the appellants and eventually cross-claimed against the engineer.
49 None of these matters persuade me that there was any error in the exercise of the discretion. Nor do they tempt me to wish to be in a position to exercise the discretion afresh were that open to me.
50 Senior counsel, with his customary frankness, acknowledged that there was no evidence indicative of some conduct on the part of the engineer known to the appellants which may have played a part in the appellants' decision to join the engineer along with the other parties sued. In my view this concession was properly made.
51 The challenge to the exercise of the judge's discretion on the matter of costs has not been made good.
52 In my view the appeal should be dismissed with costs.
53 POWELL JA: I agree.
54 FITZGERALD AJA: I agree.