Optimus Build Ltd v Southall & Anor

Factual and Procedural Background

This case concerns a contractual dispute over building works at a residential property in The City. The Plaintiff, a building company, and the Defendants, houseowners, disagreed on the contractual basis and responsibility for termination of the contract before completion of works. The Plaintiff claimed wrongful repudiation by the Defendants and sought the balance of the contract price plus loss of profit. The Defendants contended that the Plaintiff wrongfully repudiated, challenged the basis and amount of the Plaintiff’s claim, denied entitlement to loss of profit, and counterclaimed for delay-related losses.

Evidence was heard over two days from five witnesses called by the Plaintiff, including directors and consultants, and from the Defendants. A jointly instructed quantity surveying expert also provided a written report but was not cross-examined. The hearing was conducted remotely, causing some technical difficulties.

The court considered detailed factual events, legal principles, witness credibility, and submissions before delivering judgment.

Legal Issues Presented

1. What was the contractual basis agreed between the parties—whether fixed price or cost plus?
2. Who was responsible for the repudiation and termination of the contract?
3. Whether the Plaintiff was entitled to the balance of the contract price and loss of profit?
4. Whether the Defendants were entitled to delay-related losses as counterclaim?
5. Whether the Plaintiff’s suspension of works constituted repudiatory breach?

Arguments of the Parties

Plaintiff's Arguments

• The contract was a fixed price contract based on the budget estimate and subsequent conduct.
• The Defendants wrongfully repudiated the contract by refusing to pay the third interim valuation and demanding revaluation on a cost plus basis.
• The Plaintiff was entitled to the balance of the contract price and loss of profit on the remaining works.
• The suspension of works was justified and not repudiatory, as it was conditional and intended to prompt a meeting to resolve issues.
• The Defendants had no right to omit works without Plaintiff’s consent.

Defendants' Arguments

• The contract was on a cost plus basis, entitling them to pay according to actual costs plus overhead and profit.
• The Plaintiff wrongfully repudiated by suspending works without contractual right.
• The Plaintiff’s claim for the balance was overstated and on the wrong contractual basis.
• The Defendants were entitled to delay-related losses due to Plaintiff’s repudiation.
• The Plaintiff’s demand for full payment of disputed valuation and a payment plan was unjustified.

Table of Precedents Cited

Court's Reasoning and Analysis

The court began by applying established principles of contractual construction, emphasizing objective interpretation of the contract documents and communications within their commercial and factual context. Subjective intentions of the parties were disregarded unless shared and agreed.

The court examined the nature of the contract, rejecting the Defendants’ assertion of a cost plus contract. The "budget estimate" was found to be a fixed price quotation subject to certain provisional allowances and exclusions, supported by the detailed pricing and conduct of the parties. The absence of any express agreement on a cost plus basis or profit percentage reinforced this conclusion.

The court assessed the credibility of witnesses and preferred the Plaintiff’s evidence, particularly that of the experienced quantity surveyor, as consistent with the documentary record. The Defendants’ belief in a cost plus contract was held to be mistaken.

Regarding repudiation, the court considered the Plaintiff’s suspension of works following the disputed third interim valuation. It held that although the Plaintiff had no contractual right to suspend for non-payment, the suspension was conditional and aimed at resolving disputes through a meeting. The suspension did not constitute an absolute refusal or abandonment and was therefore not repudiatory. The Defendants’ interpretation of the Plaintiff’s email as a "gun to the head" was a misreading.

The court found that the Defendants repudiated by refusing to engage further after the Plaintiff’s conditional suspension and by appointing alternative contractors, thus terminating the contract. The Plaintiff’s acceptance of this repudiation was communicated clearly.

On valuation, the court accepted the Plaintiff’s final account as valued by the joint expert rather than the Defendants’ later valuation, noting procedural fairness issues. The court rejected the Plaintiff’s claim for additional steelwork remeasurement due to lack of contractual basis. The Plaintiff was awarded the value of works completed plus VAT.

The Plaintiff’s claim for loss of profit (overhead and profit) was accepted on the balance of probabilities based on expert evidence and the project’s progress. VAT on loss of profit damages was reserved pending tax authority requirements.

The Defendants’ counterclaim for delay-related losses was dismissed due to insufficient evidential foundation and failure to comply with disclosure obligations.

Holding and Implications

The court's final decision was to ENTER JUDGMENT IN FAVOUR OF THE PLAINTIFF. The Plaintiff was awarded:

• £23,628.36 inclusive of VAT for works undertaken prior to termination.
• £19,422.96 for loss of profit damages, with VAT on this sum to be determined according to applicable tax rules.

The Defendants’ counterclaim was dismissed for lack of proof.

The direct effect of this decision is that the Plaintiff recovers the balance of contract price and loss of profit damages, while the Defendants bear the costs of their unsuccessful defence and counterclaim. No new legal precedent was established; the judgment applied well-established principles of contract interpretation and repudiation in the context of building contracts.