By Mark Evans
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February 27, 2026
Part 1: The Law of Private Nuisance in NSW What is Private Nuisance? Private nuisance is a common law tort that protects landowners from substantial and unreasonable interference with their use and enjoyment of land. Unlike public nuisance — which affects the broader community — private nuisance is concerned with protecting the rights of individual landowners against interference caused by neighbouring activities. The tort does not require any physical entry onto the plaintiff's land. Interference caused by noise, vibration, dust, fumes, noxious odours, or prolonged obstruction of access can all found a nuisance claim, provided the interference is sufficiently serious. At its core, private nuisance seeks to balance two competing interests: the right of a landowner to enjoy their property without undue disturbance, and the freedom of a neighbouring landowner to use their land for legitimate purposes. Key Elements of a Private Nuisance Claim To succeed in a claim for private nuisance, a plaintiff must establish two key elements. First, there must be a substantial interference with the plaintiff's ordinary use and enjoyment of their land. Trivial or fleeting disruptions will not meet this threshold. The interference must be something that a person of ordinary habits and sensibilities, taking into account the surrounding environment and circumstances would find genuinely disruptive to their normal use of property. Second, that interference must be attributable to the defendant's use of land or activities that affect the plaintiff's land. The concept of 'substantial interference' is assessed objectively, having regard to the locality in which the land is situated and the reasonable expectations of persons using land in that area. Courts will consider the nature, duration, frequency, and intensity of the interference when determining whether it crosses the necessary threshold. A person who operates a business in Sydney's CBD, for example, must tolerate a greater degree of noise and disruption from nearby commercial activities than a homeowner in a quiet suburban street. How Private Nuisance Differs from Negligence Private nuisance is frequently conflated with the tort of negligence, but the two are conceptually and practically distinct. In negligence, the central question is whether the defendant failed to exercise reasonable care — the focus is on the defendant's conduct. In private nuisance, the focus is on the nature of the interference with the plaintiff's land, not the manner in which the defendant behaved. A defendant who has exercised all reasonable care and skill, and who cannot be criticised for the way in which it conducted its activities, may nonetheless be liable in private nuisance if the interference with the plaintiff's land is found to be unreasonable. This distinction has significant practical consequences for plaintiffs. It means that landowners and business operators who suffer interference with their properties are not required to identify and prove a specific act of carelessness on the part of the defendant. The question is whether the interference itself was unreasonable — and whether the defendant can demonstrate a lawful justification for it. The Locality Principle NSW courts apply a locality principle in assessing private nuisance claims. The reasonable expectations of ordinary landowners differ depending on whether property is located in a quiet residential area, a busy commercial precinct, or an established industrial zone. The standard applied is that of a person of ordinary habits and sensibilities living in the relevant locality, not an unusually sensitive plaintiff whose discomfort results from a pre-existing vulnerability. Defences Available to Defendants Several defences may be available to a defendant in a private nuisance claim. The most commonly invoked — particularly in the context of public infrastructure — is the defence of statutory authority. Where legislation authorises a public authority to carry out works that would otherwise constitute a nuisance, the authority may escape liability on the basis that the interference was an inevitable consequence of exercising its statutory powers. A common example is roadworks where a statutory authority, typically a Council is authorized by legislation to carry out roadworks that may impact on private land. However, the defence is not unlimited. To succeed, the defendant must establish both that the statutory power authorised the relevant interference and that the power was exercised in a manner that reasonably minimised the impact on affected landowners. A statutory power to build, without more, does not authorise every form of disruption that results from the way in which construction is carried out. Other recognised defences include prescription — where the nuisance has continued openly for 20 years without objection — and consent. These defences are narrowly applied and will rarely excuse substantial ongoing interference. Remedies for Successful Plaintiffs A successful plaintiff in a private nuisance action may seek two principal forms of relief. Damages may be awarded to compensate for losses suffered as a result of the interference, including loss of use and enjoyment of land, diminution in property value, and losses to a business operated from the affected premises. In some cases, consequential economic losses arising from the interference may also be recoverable. An injunction may be available to restrain the defendant from continuing the nuisance, though courts exercise discretion in granting injunctive relief and will consider whether damages would be an adequate remedy and where the balance of convenience lies. Why Private Nuisance Matters for NSW Landowners Private nuisance remains one of the most valuable legal tools available to NSW landowners and business operators who suffer interference with their properties. It does not require proof that the defendant was careless. It does not require physical entry onto the plaintiff's land. And it is not dependent on any specific statutory compensation scheme. This combination of features makes private nuisance particularly relevant for those affected by large-scale construction projects, infrastructure works, and industrial or commercial activities in proximity to their premises. The High Court's decision in Hunt Leather v Transport for NSW [2025] HCA 53 has confirmed and clarified the legal principles that govern such claims — and in doing so, has strengthened the position of aggrieved landowners considerably. Part 2: Hunt Leather v Transport for NSW [2025] HCA 53 — Case Summary Background and Facts The case arose from the construction of the Sydney Light Rail project — a major infrastructure undertaking in the Sydney CBD, connecting Circular Quay with Randwick and Kensington. Transport for NSW ( TfNSW ) was the statutory authority responsible for the design and delivery of the project. The plaintiffs, including Hunt Leather Pty Ltd, were proprietors of businesses located along the construction route. They brought representative proceedings seeking damages against TfNSW in private nuisance, alleging that TfNSW's construction activities caused substantial interference with their businesses through noise, dust, vibrations, and impediments to access. The central complaint was not merely that construction was disruptive, but that it extended far beyond the timeframes set out in TfNSW's Initial Delivery Program ( IDP ) — the document that notified affected businesses of the anticipated duration of construction in each stage or 'fee zone.' The delays were substantially caused by the unexpected discovery of underground utilities along the construction route, which had not been identified or accounted for when the IDP was prepared. The Trial Decision At first instance in the NSW Supreme Court, the trial judge found TfNSW liable in private nuisance. The judge held that the delays which caused construction to extend beyond the IDP periods amounted to unreasonable interference with the plaintiffs' enjoyment of their properties. Critically, the trial judge rejected TfNSW's submission that it had exercised reasonable care in planning the works and that this was sufficient to defeat the claim. The judge accepted that reasonableness in nuisance is assessed by reference to the nature of the interference — not the conduct of the defendant. The NSW Court of Appeal TfNSW appealed, and the NSW Court of Appeal overturned the trial judge's findings. The Court of Appeal concluded that the plaintiffs had failed to establish that the interference was unreasonable. In the Court's view, the IDP could not be treated as a reliable benchmark for assessing the reasonableness of the interference, because it made no allowance for contingencies such as inclement weather or the discovery of underground utilities. The Court also held that the plaintiffs had failed to establish what pre-construction investigations TfNSW could reasonably have undertaken, whether those investigations would have been feasible, how long they would have taken, and whether they too might have constituted a substantial interference with the plaintiffs' land. In the absence of that evidence, the plaintiffs could not demonstrate that the construction exceeded a reasonable timeframe. The Court of Appeal went further, stating that it could not be the law that construction authorised by statute becomes actionable nuisance simply because it takes longer than scheduled. This observation reflected significant judicial caution about the prospect of imposing nuisance liability on public infrastructure projects that experience ordinary construction delays. The High Court Decision The High Court allowed the plaintiffs' appeal and upheld the trial judge's finding. In doing so, the Court provided the most authoritative and comprehensive statement of the principles governing private nuisance to emerge from an Australian appellate court in many years. The lead judgment was delivered by Justices Gordon and Edelman, with the Chief Justice and other members of the Court providing separate concurring judgments. Substantial Interference — The starting point for any nuisance claim is whether there has been a substantial interference with the plaintiff's ordinary enjoyment of land. This threshold must be established by the plaintiff and is assessed objectively by reference to the locality and the reasonable expectations of persons using land in that area. The High Court confirmed that this element was clearly established on the facts: the prolonged occupation of fee zones, far beyond what was contemplated in the IDP, plainly constituted a substantial interference with the plaintiffs' use and enjoyment of their properties. Common and Ordinary Use — Once substantial interference is established, the onus shifts to the defendant to justify it. The first question is whether the defendant's use of land was 'common and ordinary' for that locality. This is assessed with regard to the objectively reasonable expectations for land use in the relevant area. The Court emphasised that 'common and ordinary' does not mean 'performed with reasonable care.' The inquiry is about the nature of the use itself — whether it is the kind of use that landowners in that locality could reasonably expect from their neighbours — not about the standard of care with which it is carried out. Conveniently Done — Even if a defendant's use of land is found to be common and ordinary, it may still constitute nuisance unless the defendant can establish that the interference was 'conveniently done.' This test requires the defendant to demonstrate that it took reasonable steps to minimise the extent of the interference with the plaintiff's enjoyment of land. As Justices Gordon and Edelman explained, this requires consideration not merely of the convenience of the defendant, but also the convenience of the plaintiff. A defendant cannot point to its own operational preferences, financial constraints, or project management decisions to justify an extended and substantial interference with a neighbouring landowner's use of their property. Burden of Proof — The High Court confirmed the allocation of the burden of proof with clarity. The plaintiff bears the legal onus of establishing substantial interference with the common and ordinary use of their land. Once that is established, the onus shifts to the defendant to prove — by way of defence — that its use of land was common and ordinary and was conveniently done. The plaintiff also has an evidentiary onus to identify the respects in which the defendant's conduct was not conveniently done, but is not required to prove a detailed counterfactual about what the defendant could have done differently and with what result. No Counterfactual Required — One of the most important aspects of the High Court's decision is its rejection of the Court of Appeal's finding that the plaintiffs were required to establish what steps TfNSW could and should have taken prior to and during construction to reduce the interference, and to prove that those steps would have made a material difference. The High Court held that this requirement imposed an unrealistic and disproportionate evidential burden on plaintiffs who are unlikely to have access to the defendant's internal planning records, operational data, and project management decisions. Statutory Authority Defence TfNSW argued that it was immune from liability on the basis that the Sydney Light Rail was authorised by legislation. The High Court upheld the Supreme Courts' rejection of this defence. The Court confirmed that statutory authority requires the defendant to establish that the interference was an inevitable consequence of the exercise of the statutory power — not merely that the project as a whole was authorised by statute. Because the prolonged delays that caused the interference resulted from TfNSW's own planning decisions and choices, rather than from the inherent nature of the authorised works, the interference was not inevitable. The statutory authority defence therefore failed. Section 43A of the Civil Liability Act 2002 (NSW) TfNSW also relied on s 43A of the Civil Liability Act 2002 (NSW), which attenuates the standard of care applicable to public authorities exercising special statutory powers. The High Court unanimously confirmed that s 43A does not operate as a standalone defence, but rather adjusts the applicable standard of care. More importantly, the Court held that s 43A did not apply on the facts because the planning and procurement of the project did not involve the exercise of a 'special statutory power' within the meaning of the provision. Outcome Although the Justices reached different conclusions on the question of whether TfNSW's use of land was 'common and ordinary,' they were unanimous in finding that TfNSW's construction was not 'conveniently done.' TfNSW was accordingly held liable to the plaintiffs in private nuisance, and the trial judge's award of damages was reinstated. Part 3: Implications for Private Nuisance Law in NSW Nuisance and Negligence Are Distinct The High Court's most enduring contribution in Hunt Leather is the unequivocal confirmation that private nuisance and negligence are distinct torts governed by different principles. For plaintiffs, this is of profound practical significance. A landowner or business operator who suffers substantial interference with the use and enjoyment of their property is not required to prove that the interfering party was careless, that a duty of care was owed, or that the defendant breached any applicable standard of reasonable conduct. The question in nuisance is whether the interference itself was unreasonable — not whether the defendant's behaviour was unreasonable. This distinction opens the door to liability even where the defendant has done everything that could reasonably be expected of a careful and diligent operator. A Stronger Position for Affected Landowners For NSW landowners and business operators, Hunt Leather provides a clearer and more accessible legal framework for pursuing private nuisance claims arising from construction and infrastructure works. The rejection of the counterfactual requirement — which would have compelled plaintiffs to mount a detailed expert case about how the defendant's project planning should have been conducted — removes a significant practical obstacle. Affected parties need only identify the respects in which the defendant's use of land was not conveniently done. Once that evidentiary case is made, the burden falls squarely on the defendant to justify the interference. This is a more workable framework for landowners and business operators who will often lack access to the defendant's internal planning documents, programming schedules, and operational decision-making. It recognises that the plaintiff is not in a position to know the full detail of how the defendant managed its project. Obligations for Statutory Authorities and Project Proponents The decision carries important and practical implications for statutory authorities responsible for infrastructure and construction projects, as well as for their contractors and project managers. The mere fact that works are authorised by statute will not protect an authority from liability in private nuisance. To successfully invoke the statutory authority defence, the authority must demonstrate that the interference with neighbouring landowners was an inevitable consequence of exercising its statutory powers — and that those powers were exercised diligently and expediently and with proper consideration for the interests of affected parties. Where delays and disruptions result from the authority's own planning choices — inadequate pre-construction investigations, unrealistic programming or poor risk management — the statutory authority defence will not provide protection. Authorities and contractors must invest seriously in thorough pre-construction investigations, realistic and contingency-aware programming, and active management of construction impacts on neighbouring properties and businesses. Where extended works or delays are unavoidable, authorities should be in a position to demonstrate the specific steps taken to minimise the impact on affected parties. The 'Conveniently Done' Standard The High Court's articulation of the 'conveniently done' standard will be a focal point of future private nuisance litigation. The test is a demanding one. It requires defendants to demonstrate not merely that their chosen approach to construction was operationally convenient or cost-effective for them, but that it gave proper and genuine consideration to the impact on neighbouring landowners. The interests of the plaintiff must be weighed alongside the interests of the defendant in assessing whether the interference was conveniently done. In practice, this means that authorities and project proponents should document their impact mitigation efforts from the earliest stages of a project. Evidence of proactive engagement with affected businesses, meaningful adjustment of construction sequences to reduce impacts, and genuine consideration of alternative approaches will all be relevant to establishing that the interference was conveniently done. Defendants who cannot point to such measures will face significant exposure. Conclusion Hunt Leather v Transport for NSW [2025] HCA 53 is the most significant development in the law of private nuisance in Australia in recent decades. By authoritatively clarifying the framework for establishing and defending nuisance claims, and by firmly distinguishing the tort from negligence, the High Court has provided both plaintiffs and defendants with a clearer understanding of their legal rights and obligations. For landowners and business operators in NSW, the decision confirms that private nuisance is a robust and accessible legal remedy — one that provides genuine protection where the use and enjoyment of land is substantially and unjustifiably disrupted by the activities of others. For statutory authorities, infrastructure proponents, and their contractors, it is a clear signal that thorough planning, realistic programming, and genuine impact mitigation are not merely good practice — they are legal imperatives. The contents of this article are a general guide and intended for educational purposes only. Determination of issues of the kind discussed in this article is often complex and varies greatly from case to case. Each individual case is different and requires a detailed understanding of matters of fact and degree upon which reasonable minds may differ. DO NOT RELY ON THIS ARTICLE AS A SUBSTITUTE FOR COMPETENT LEGAL ADVICE.