Stansbie v Troman

Stansbie v Troman [1948] 2 KB 48 is a Court of Appeal decision of enduring significance in the law of tort. The case concerns the liability of a self-employed decorator for the loss suffered by his clients when their home was burgled after he left the premises unsecured during a temporary absence. The decision addresses a recurring and practically important question: in what circumstances may a person be held liable in negligence for harm that is the direct product of the criminal conduct of an independent third party?

The defendant, Troman, was a decorator engaged to carry out decorating work at the home of the plaintiffs, Mr and Mrs Stansbie. The work was ongoing and Troman was present at the property alone on the occasion in question, the householders having left him to continue the decorating in their absence. There was no suggestion that this arrangement was unusual or that the plaintiffs had issued specific instructions requiring Troman to remain on the premises at all times.

During the course of the working day, Troman found it necessary to leave the premises temporarily in order to purchase wallpaper required for the job. When he departed, he failed to lock the front door or otherwise secure the property. He left the house entirely unsecured and accessible to any person who might choose to enter from the street.

While Troman was absent, burglars entered the property through the unsecured door and stole items belonging to the plaintiffs. The theft was thus made possible directly by the failure of the defendant to secure the premises before leaving. The plaintiffs commenced proceedings against Troman in negligence, seeking to recover the value of the stolen property.

At first instance, judgment was entered in favour of the plaintiffs, a decision which the defendant appealed to the Court of Appeal. The appeal raised fundamental questions about the extent to which a contractor working on another's premises assumes positive obligations in respect of the security of those premises, and about the legal treatment of harm caused by the intervening criminal acts of third parties.

The central issue before the Court of Appeal was whether Troman, as a workman left alone in charge of the plaintiffs' house, owed a duty of care to take reasonable precautions to prevent the foreseeable risk of burglary when temporarily vacating the premises. In particular, the court was required to consider whether that duty extended to securing the front door upon departure, and whether the failure to do so constituted actionable negligence.

A secondary but related issue was whether the intervening criminal act of the burglars — a voluntary and unlawful act by an independent third party — broke the chain of causation between Troman's negligence and the plaintiffs' loss, so as to defeat the claim. The defendant's case implicitly relied upon the general reluctance of the common law to impose liability for harm caused by the deliberate wrongdoing of strangers.

Underlying both issues was a broader question of legal principle: does the law of negligence impose positive duties upon contractors to take active steps to prevent harm from third-party crime, and if so, what is the doctrinal basis for such an obligation?

The Court of Appeal dismissed Troman's appeal and upheld the finding of liability. The court's reasoning proceeded through several connected steps, addressing the duty of care, the question of the intervening act, and the standard of care expected of a contractor in Troman's position.

The court began by affirming the general principle that the existence of a duty of care in negligence depends upon the reasonable foreseeability of harm and the nature of the relationship between the parties. On the facts, the court had no difficulty in finding that burglary was a plainly foreseeable consequence of leaving a house in a residential street completely unsecured with no occupant present. Any reasonable person would appreciate that an unlocked and unattended dwelling created an obvious opportunity for theft.

Crucially, the court focused on the special relationship that arose between Troman and the plaintiffs by reason of the contractual and factual circumstances. Troman had been entrusted with sole charge of the premises during the householders' absence. That entrustment carried with it an implicit assumption of responsibility for the care and security of the property. The plaintiffs had, by their departure, placed reliance upon Troman to behave reasonably in respect of the house, including by taking basic precautions to secure it should he need to leave temporarily. This element of assumption of responsibility and corresponding reliance is essential to the court's analysis, providing the juridical foundation for the imposition of a positive duty to act.

The court addressed the defendant's argument that the criminal act of the burglars constituted a novus actus interveniens — a new intervening cause — sufficient to break the chain of causation and relieve Troman of liability. The court firmly rejected this contention. It is a well-established qualification to the novus actus principle that where the very breach of duty complained of consisted in the failure to take precautions against the risk of a third party's intervention, the criminal act of that third party does not break the chain of causation. To hold otherwise would be to permit the wrongdoer to escape liability by pointing to the very harm that his own breach of duty was calculated to prevent.

This reasoning reflects what is sometimes described as the "scope of the duty" analysis in the law of negligence. Where a defendant's duty is precisely to guard against the risk of harm from third-party conduct, the occurrence of that conduct cannot logically negate the defendant's responsibility. The court thus drew a clear distinction between cases where a third party's criminal act is wholly extraneous and unforeseen, and cases — such as the present — where the defendant's very obligation is to prevent the foreseeable risk of such conduct.

On the standard of care, the court held that the precaution required of Troman was minimal. Locking a front door when leaving a house unoccupied is the most elementary step that any reasonable person in charge of premises would take. There was no special skill or knowledge required; it was a straightforward act that Troman failed, without any adequate explanation, to perform. The court was not persuaded that the temporary and incidental nature of Troman's absence afforded any justification for the failure to lock the premises.

The court also considered the nature of the contractual relationship between the parties as a factor informing the scope of the duty owed. Although the claim was framed in tort rather than contract, the court recognised that the contractual context — a service provider working in a domestic dwelling — was relevant background to understanding the obligations that arose. A contractor who is granted access to another's home as a working environment is in a materially different position from a passer-by who happens to notice an open door. The degree of access, control, and trust reposed in Troman informed the content and scope of the duty of care that the law imposed upon him.

The court's approach to the liability of defendants for harm caused by third parties sits within a broader doctrinal framework. As a general rule, the common law does not impose liability for pure omissions or for the acts of third parties. However, well-recognised exceptions to this principle arise where there is a special relationship between the defendant and the plaintiff, or where the defendant has assumed responsibility for the plaintiff's welfare or property. Stansbie v Troman is a clear example of this latter exception: the assumption of responsibility by Troman, arising from the practical circumstances of his engagement, provided the normative basis for his liability.

The court also implicitly endorsed the proposition that the duty owed in such circumstances is not absolute. Troman was not required to guarantee the security of the premises against all possible risks. Rather, he was required to take those precautions that a reasonable person in his position would take, having regard to the foreseeable risks and the ease with which they could be guarded against. In the circumstances, locking the door was not merely reasonable — it was the obvious and basic minimum. The duty was therefore not onerous; it was simply not discharged.

As to causation, the court found no difficulty on the facts. The plaintiff's loss was the direct consequence of the unsecured entrance created by Troman's breach of duty. But for his failure to lock the door, the burglars would not have been afforded easy access to the property. The causal connection between the breach and the loss was direct, and no issue of remoteness arose: the theft of property from an unlocked house by burglars was precisely the kind of harm that the duty to secure the premises was designed to prevent.

The Court of Appeal held that Troman was liable in negligence to the plaintiffs for the value of the property stolen during the burglary. He owed a duty of care to take reasonable precautions to secure the premises when leaving temporarily, by reason of the assumption of responsibility inherent in his position as the sole person in charge of the property during the householders' absence.

The court further held that the intervening criminal acts of the burglars did not break the chain of causation. Where the very duty breached is a duty to guard against the risk of third-party criminal intervention, the occurrence of that intervention cannot operate as a novus actus interveniens to relieve the defendant of liability.

The appeal was accordingly dismissed and the first instance judgment in favour of the plaintiffs was upheld.

Stansbie v Troman occupies an important place in the development of the law of negligence in two principal respects. First, it provides clear authority for the proposition that a contractor or tradesperson entrusted with sole charge of another's premises assumes a positive duty to take reasonable precautions for the security of those premises. The decision confirms that the law does not limit a contractor's obligations to the quality of the work performed; it extends to the prudent exercise of care in relation to the property itself, including its protection from foreseeable risks during the period of engagement.

Second, the case makes a significant contribution to the jurisprudence on liability for harm caused by the criminal acts of third parties. The general principle that there is no liability for the acts of independent third parties is well established, but Stansbie v Troman demonstrates convincingly that this principle yields where the defendant has assumed responsibility to guard against precisely that risk. The decision has been consistently cited in subsequent cases dealing with the liability of occupiers, security services, and other parties for losses arising from third-party crime, and remains a foundational authority in this area.

The case has been influential in shaping the modern understanding of assumption of responsibility as a basis for positive duties in negligence. Later decisions, including those of the House of Lords in cases examining liability for omissions and third-party acts, have drawn upon the underlying principle articulated in Stansbie v Troman: that a voluntary assumption of responsibility, combined with reliance by the claimant, can generate an obligation to take active steps to prevent harm, even where that harm ultimately materialises through the agency of another person.

For law students, Stansbie v Troman serves as a valuable illustration of how the courts manage the tension between the general reluctance to impose liability for omissions and the demands of justice in cases of clear reliance and assumption of responsibility. It demonstrates that the categorisation of a defendant's conduct as active or passive, or of harm as caused by the defendant or by an intervening third party, is not mechanically determinative; the underlying question is always whether, in the particular relational context, it is fair, just, and reasonable to hold the defendant liable. The answer in Stansbie v Troman was plainly affirmative, and the decision continues to provide practical guidance to practitioners advising contractors, tradespeople, and others who are entrusted with care of another's property.