Vale restitution? The High Court clarifies remedies available to construction contractors following termination for repudiation

By Nick Rudge , Julian Berenholtz
Infrastructure Manufacturing & Construction

In brief 7 min read

In a welcome decision for principals engaging contractors for construction work, the High Court has substantially limited the availability of the restitutionary remedy of a quantum meruit where a contractor elects to terminate a contract as a consequence of repudiation1. In reaffirming the primacy of the bargain struck between parties, the High Court has again confirmed that commercial certainty is at the heart of contracts governed by the common law of Australia.

Key takeaways

  • A principal no longer bears the risk that, following termination by a contractor for repudiation, a contractor will be entitled to recover a sum in excess of the normal measure of damages that flow from the breach, even if it seeks the fair and reasonable value of the works performed on a quantum meruit basis.
  • Recovery on a quantum meruit basis will be limited by the terms of the contract between the parties (despite the fact it has come to an end).
  • The relevance of a quantum meruit in restitution is now limited to a scenario where a contractor seeks payment in respect of work performed, where no contractual payment has accrued.
  • In the above circumstances, and having regard to the evidentiary requirements of a claim in damages versus a claim in restitution, the contractor may still make an election as to the remedy sought, albeit on the basis that the prospect of greater compensation by a quantum meruit is no longer possible.

The facts

Peter and Angela Mann (the Manns) contracted Paterson Constructions Pty Ltd (Paterson) to build two townhouses under a major domestic building contract under the Domestic Building Contracts Act 1995 (VIC) (DBC Act)2. Prior to the completion of the second townhouse, the Manns claimed the contractor repudiated the contract, purported to accept the repudiation and excluded the contractor from the site. The contractor asserted that the Manns' conduct amounted to repudiation, which it subsequently accepted. The Manns had verbally directed 42 variations and the contractor had received $945,787 as progress payments against a contract price of $916,779 that did not account for the cost of the variations.

The decisions of VCAT and the lower courts

VCAT – Paterson Construction Pty Ltd v Mann [2016] VCAT 2100

Paterson sought relief on a quantum meruit basis, or, alternatively, for sums allegedly owed under the contract. Relying on Sopov v Kane Construction Pty Ltd (No 2)3, VCAT found that quantum meruit was available to the contractor and, taking up the expert evidence of the contractor's quantity surveyor, assessed a further $660,526.41 to be paid by the Manns, in part on account of the 42 variations, representing a recovery of considerably more than would have been awarded as damages for breach.

Supreme Court – Mann v Paterson Construction Pty Ltd [2018] VSC 119

Cavanough J affirmed the VCAT decision, noting that quantum meruit has been a settled part of Australian law for more than a century, that the remedy assumes the legal fiction of the contract being void ab initio and that special leave to appeal to the High Court on this question had previously been refused. His Honour held that the contract price was a permissible but not a mandatory consideration in assessing a quantum meruit and did not provide a ceiling to recovery. Moreover, as the remedy is not compensation for contractor's cost, but a fair and reasonable valuation of the benefit conferred on the principal, his Honour found it was open for the quantity surveyor to assess both a profit margin for the contractor and costs that a reasonable builder may have incurred even if Paterson did not.

Court of Appeal – Mann v Paterson Construction Pty Ltd [2018] VSCA 231

The Court of Appeal highlighted that the availability of a quantum meruit had been subject to significant criticism on the bases that it has no regard to accrued rights and substitutes contractual obligations with an obligation to pay fair and reasonable renumeration. Despite this, the court considered it was bound to follow existing precedent, that the contract price was of little evidentiary value in this case and, agreeing with Cavanough J, that it was fair and reasonable to assess a higher quantum meruit sum even if the builder, being economical, incurred lower costs.4

The decision of the High Court

The High Court was required to determine two critical questions (the third relating to section 38 of the DBC Act, which is not canvassed here):

  1. Whether the contractor was entitled to sue on a quantum meruit, having terminated for repudiation; and
  2. If yes, whether the contract price operated as a ceiling on the amount claimable.

Three judgments were handed down. The court unanimously rejected the ratio of the foundational Privy Council decision in Lodder v Slowey5 as the rescission fallacy.

The court was divided in relation to the remaining availability of a quantum meruit given the rejection of Lodder v Slowey. The majority of Nettle, Gordon and Edelman JJ agreeing with Gageler J, held it was available only where no right to payment has accrued under the relevant contract (albeit for different reasons). The majority considered that the remedy was limited to the contract price for the relevant stage or part of the works. The minority of Kiefel CJ, Bell and Keane JJ, having held that the answer to the first question is 'no' because the restitutionary remedy is not available where a contractual remedy for damages for loss of bargain is also available, found it was therefore unnecessary to answer the second question.

In summary:

  1. Nettle, Gordon and Edelman JJ found the remedy of quantum meruit was available only in circumstances where a contractor has performed work for which the right to payment had not accrued prior to termination. By way of example, in respect of uncompleted stages of a project, where progress payment are payable on the completion of a stage, there will be a total failure of consideration in respect of those stages arising from the failure of the builder's right to complete the performance and earn the price. In such circumstances, restitution by a quantum meruit is available to be assessed on the basis of the contract sum agreed by the parties. Their Honours also recognised that exceptional circumstances may give rise to a scenario where an assessment on the basis of the reasonable value of the benefit leads to recovery in excess of the contract sum.
  2. Gageler J agreed, albeit by a 'narrower path of reasoning' in identifying the different categories of work to be analysed, finding that: 
      1. no quantum meruit was available to the contractor for work done under the contract for which a contractual right to payment had accrued as at the date of termination. The accrued contractual right to payment remains available post-termination and is enforceable as a common law action in debt; and
      2. in respect of work done by the contractor under the contract for which no contractual right to payment had accrued at the date of termination, a non-contractual quantum meruit was available to recover remuneration for part performance of an enforceable contract, as limited by the relevant portion of the contract price under that terminated contract.
  3. In rejecting the contractor's entitlement to sue on a quantum meruit, the minority of Kiefel CJ, Bell and Keane JJ reasoned that the:
    '…clear contemporary understanding of the effect of termination, considerations of coherence, certainty and commercial convenience provide ample reason to move on from adherence to the vestiges of what is now seen to be an unprincipled right to remuneration for work done, unconstrained by the terms of the contract.'
    Despite this, the minority considered that in some cases '…justice will not be done without a restitutionary claim', although examples of such cases were not provided.

The matter was remitted to VCAT to determine the extent of the works performed by the contractor for which a right to payment did not accrue prior to termination.


After many years of commentary on the appropriateness of a contractor having the opportunity to elect to seek either contractual damages or a quantum meruit following termination for repudiation, the High Court has provided welcome clarity. This decision dispenses with the threat of a quantum meruit claim in respect of work performed under a construction contract for which a right to payment has already accrued, and curtails the availability of the remedy such that recovery will be constrained by the terms of the applicable construction contract.

It is interesting that Nettle, Gordon and Edelman JJ took care to enumerate various exceptions to the rule, although this view was not shared by Gageler J.

Finally, the majority and the minority disagreed on the relative advantages of their preferred remedies, each claiming that quantum meruit or a contractual claim for loss of bargain compared favourably with the other in terms of the ease of making the respective claim. This judicial disagreement illustrates the continued relevance of the choice to be exercised by the innocent party as to which remedy to pursue, taking note of the practical advantages that apply to their circumstances.


  1. Peter Mann & Anor v Paterson Constructions Pty Ltd [2019] HCA 32

  2. Each decision also considered whether section 38 of the DBC Act excludes a remedy in restitution in respect of variations to the implemented, other than in accordance with that section. The High Court ruled that it did, however this note does not address those aspects of the case in detail, and rather focusses on the work undertaken prior to determination that performed by reference to the original scope of the contract.

  3. (2009) 24 VR 510.

  4. See: Eddy Lau Constructions Pty Ltd v Transdevelopment Enterprise Pty Ltd [2004] NSWSC 273.

  5. [1904] AC 442.