(3) Each of Mr and Mrs Chua and the defendants may be estopped from raising any issue that could have been, but was not, raised in the proceedings and thus decided by the judgment.
24 Ordinarily, the ambit of an estoppel created by a judgment will depend on the issues that the parties propounded for the court's determination. However, where the judgment is given pursuant to a contract, it is relevant to look not only at the pleaded issues but also at the terms of the contract. For example, the contract may state expressly that particular issues are excepted from the compromise, and are not to be taken as being resolved by any judgment given pursuant to the compromise.
25 The point is illustrated by Isaacs v The Ocean Accident and Guarantee Corporation Ltd (1958) SR (NSW) 69. In that case, the majority (Street CJ and Roper CJ in Eq) had regard to terms of settlement signed by counsel to see what it was that the parties, by their express agreement recorded in those terms, intended to be resolved through the entry of judgment. Those terms were said to be "without admission of liability". Their Honours said at 75 that the terms of settlement showed that the parties had "removed from the Court's consideration any question of the liability of the plaintiff… to the … defendant". Their Honours said at 76 that "[i]n effect, the parties, by their compromise of the action, agreed that the issue of liability should not be submitted to the adjudication of the court, and the judgment, when entered, was not to be taken as establishing that the plaintiff… was in fact liable to [the defendant]". Their Honours said that the contrary conclusion "would make an estoppel operate in a manner contrary to the clear intention of the parties as disclosed by the record".
26 Mr Bailey submitted that acceptance of the offer of compromise had the effect of compromising not only Mr and Mrs Chua's claim but also Archiworks' defence of set off (or, as he put it, "set off claim".) He relied on UCPR rr 20.26, 20.27 and decisions such as Whitehouse Properties Pty Ltd v Bond Brewing (NSW) Ltd (1992) 28 NSWLR 17. It is sufficient to say that the submissions, and for that matter the authorities to which Mr Bailey referred, do not address the point arising from the decision of the majority in Isaacs, and do not detract from, or render inapplicable in this case, their Honours' analysis.
27 In this case, for the reasons that I have given, a consideration of the terms of the contract created by acceptance of the offer of compromise makes it clear that the parties' intention (objectively ascertained) was to compromise only Mr and Mrs Chua's claim, and to leave alive for subsequent resolution (if necessary, by the Court) Archiworks' cross-claim. The parties removed from the Court's consideration, and therefore from the effect of any judgment entered pursuant to the accepted offer of compromise, Archiworks' claim as advanced in its cross-claim.
28 Thus, I conclude, Archiworks is not estopped, by the terms of the judgment, from pursuing its cross-claim. The contrary position would be inconsistent with the intention of the parties, objectively ascertained (and, I might add, with the subjective understanding and intention disclosed in the letter of acceptance).
29 Mr Ashhurst also submitted that, having regard the procedural nature of statutory set-off (or a defence by way of set-off - see s21 of the Civil Procedure Act 2005), the same result would follow. He submitted that there could be no issue estoppel on a defence by way of set-off until either an order of set-off was made or, where the subject matter of the set-off was also articulated as a positive claim (for example, through a cross-claim) by a judgment on that claim. It is unnecessary to deal with that submission.
Are Mr and Mrs Chua estopped?
30 It is convenient to consider this issue (number 2 in Mr Ashhurst's statement) out of sequence.
The parties' submissions
31 It was common ground that all the claims pleaded by Mr and Mrs Chua had merged into the judgment (see my summary of the effect of the judgment at [23(1)] above. Mr Ashhurst submitted that the effect of the merger of the pleaded claims into the judgment, combined with the effect of the issue estoppels and extended issue estoppels created by the judgment (see at [23(2), (3)] above) was to prevent Mr and Mrs Chua from asserting that they had made any overpayments the effect of which was to reduce or extinguish any liability that they might have to Archiworks for its fees.
32 Mr Bailey acknowledged that one of the effects of the judgment was to preclude his clients from asserting any further claim, whether for damages, "on restitutionary principles" or otherwise, that had been or could have been pleaded in the FASC. However, he submitted, the judgment did not preclude them from asserting, in answer to Arhiworks' claim for fees, that they had made overpayments to Archiworks of such extent as to extinguish any further liability for fees. Mr Bailey stressed that the claim was purely defensive, and that no attempt was made to recover the amount of the alleged overpayments.
Relevant terms of the contract
33 By cl 14(a), (b) of the contract, read in conjunction with schedule 5, Mr and Mrs Chua were obliged to pay Archiworks a lump sum fee, for construction management services, in the sum of $108,000.00 plus GST. That fee was to be paid by monthly instalments calculated in a specified manner. Clause 14(b) provided that the amount of the fee might vary with variations in the cost of the works.
34 The contract gave either party the right to terminate it by giving the other ten written days notice of intention to do so (cl 17). Upon such termination, any outstanding construction management fees were payable, as were any outstanding fees for preconstruction duties; and a "termination fee" in accordance with cl 19 also became payable. By cl 19(a)(i), the termination fee was stated to be, in effect, the lump sum fee of $108,000.00 pro-rated by reference to the value of construction work, compared to the estimated total cost of the works at the time termination, less all amounts paid.
35 Archiworks asserted that the cost of works executed to the date of determination was $545,000.00, and that the estimated total cost of works at that time was $899,000.00 (in each case, in round figures). It claimed an entitlement to 60.5% of the lump sum fee of $108,000.00: $65,347.00; and said that $35,000.00 of this had been paid. (In addition, Archiworks claimed reimbursement of the costs of some windows, doors and shower screens, in the total sum of about $21,000.00, that it said it had bought and paid for on behalf of Mr and Mrs Chua.)
36 Clause 16 of the contract dealt with progress payments. It required Archiworks to submit, monthly, a statement of the cost of works during the month in question and the estimate of fees due. Mr and Mrs Chua thereupon became obliged to pay within a specified time the costs incurred and the fee. It is not clear why cl 16 is relevant. The regime for payment of the termination fee is dealt with in cls 17 and 19. Clause 16 deals with something different: namely, payment for work and on account of fees during the currency of the contract. To divert a moment: Mr Bailey submitted that Archiworks was not entitled to payment of its termination fee except upon demonstration of compliance with cl 16. I do not accept that submission, for the reason that I have just given. Nonetheless, I should note that Archiworks included in its tender what it said was a certificate pursuant to cl 16 dated 9 August 2005, showing (or purporting to show) both the estimated value, as at the date of termination, of all works under the contract and the amount of all deposits and progress payments paid to it up to that date.