Proprietary Estoppel

Proprietary estoppel is a principle in equity that prevents a legal owner of property from asserting their strict legal rights when it would be unjust or inequitable to do so, due to the reliance of another party on an assurance or promise relating to the property. This doctrine is especially significant in land law and often arises when someone has been led to believe they will have a right or interest in property, and they have acted to their detriment based on that belief.

The essential elements of proprietary estoppel were clearly outlined in the case of Thorner v Major (2009). In this case, a farmer, David Thorner, worked on his cousin's farm for many years without formal payment, believing that the farm would eventually pass to him. Although the cousin never explicitly promised the farm to David, he made various informal statements and gestures that led David to believe he would inherit it. When the cousin died without leaving a will, the question arose whether David had any right to the farm. The House of Lords held that proprietary estoppel applied, as there had been a clear, though informal, assurance that led David to reasonably believe he would inherit the farm, and he had acted to his detriment by working on the farm for many years without compensation. This case clarified that the assurance need not be explicit, as long as it can be reasonably interpreted as a promise.

The doctrine of proprietary estoppel usually arises in three circumstances: assurance, reliance, and detriment. First, there must be some form of assurance, representation, or promise by the landowner. This was evident in Thorner v Major, where the landowner's conduct was interpreted as an assurance that David would inherit the property. Assurance can take various forms, such as informal promises or acts that suggest future ownership or rights over the property. In Crabb v Arun District Council (1976), the court found that an implied assurance had been given when the council led the plaintiff to believe he would have a right of access to his land through a specific point. The plaintiff relied on this belief, and when the council later sought to revoke access, the court held that proprietary estoppel applied, preventing the council from going back on its assurance.

Reliance is the second key element of proprietary estoppel, where the claimant must have relied on the assurance in some meaningful way. In the case of Gillett v Holt (2001), Geoffrey Gillett worked for many years on a farm owned by Mr Holt, who repeatedly assured Gillett that he would inherit the farm. Gillett, in reliance on these assurances, dedicated his life to the farm, foregoing other opportunities and making financial decisions based on the belief he would eventually own it. When Holt later sought to disinherit Gillett, the court held that Gillett had acted to his detriment in reliance on the repeated assurances, and therefore, proprietary estoppel applied. This case illustrates that the reliance must be reasonable, and there must be a connection between the reliance and the actions taken by the claimant.

The final element is detriment. For proprietary estoppel to succeed, the claimant must have suffered some form of detriment as a result of relying on the landowner's assurance. This detriment can take many forms, such as financial loss, investment of time or labour, or giving up other opportunities. In Inwards v Baker (1965), a father encouraged his son to build a bungalow on the father's land, assuring him that he could live there indefinitely. Relying on this assurance, the son invested significant time and money into building the bungalow. When the father later sought to evict him, the court held that proprietary estoppel applied, as the son had acted to his detriment by building the house and would suffer unfairness if the father were allowed to enforce his strict legal rights.

The remedy for proprietary estoppel can vary and is flexible, as the court seeks to do what is fair in the circumstances. In some cases, the court may grant the claimant an ownership interest in the property, as in Thorner v Major. In other instances, the court might grant a lesser interest, such as a right to live in the property for life, or even award monetary compensation in place of a property right. In Jennings v Rice (2002), the court emphasised that the remedy must be proportionate to the detriment suffered. In this case, Mr Jennings had cared for an elderly woman, who had informally promised him her home. When she passed away without leaving a will, the court held that Jennings was entitled to a remedy, but rather than granting him the house, which was far more valuable than the detriment he had suffered, he was awarded a sum of money.

Proprietary estoppel is a flexible and equitable doctrine that prevents injustice where a party has relied on an assurance relating to property to his detriment. The case law has developed the key elements of assurance, reliance, and detriment, as illustrated by cases such as Thorner v Major, Gillett v Holt, and Crabb v Arun District Council. The remedies for proprietary estoppel are varied and aim to balance the detriment suffered by the claimant with what is fair and just in the circumstances, allowing the courts to craft equitable solutions that reflect the needs of each case.
    Back to blog
    UOLLB SQE Turbocharge

    UOLLB SQE Turbocharge

    Get ready for the SQE1 with high-performance SQE Study Guides developed by UOLLB and published by UOL Press to revolutionise your study method and exam strategy.

    Turbocharge SQE Performance Here

    UOL Case Bank

    Upon joining, you become a valuable UOL student and gain instant access to over 2,100 essential case summaries. UOL Case Bank is constantly expanding.
    Speed up your revision with us now👇

    Subscribe Now

    Where are our students from?

    Council of Europe
    Crown Prosecution Service
    Baker Mckenzie 
    Yale University
    University of Chicago
    Columbia University
    New York University
    University of Michigan 
    INSEAD
    University of London
    University College London (UCL)
    London School of Economics (LSE)
    King’s College London (KCL)
    Royal Holloway, University of London 
    Birkbeck, University of London
    SOAS, University of London
    University of Manchester
    University of Zurich
    University of York
    Brandeis University
    University of Exeter
    University of Sheffield
    Boston University
    University of Washington
    University of Leeds
    University of Law
    University of Kent
    University of Hull
    Queen’s University Belfast
    Toronto Metropolitan University
    Hong Kong University of Science and Technology
    University of Buckingham
    ESSEC Business School

    • Criminal Practice

      Diagrams and Charts

      Our carefully designed diagrams and charts will guide you through complex legal issues.

    • Criminal Law

      Clear and Succinct Definitions

      Key concepts are concisely defined to help you understand legal topics quickly.

    • Property Law

      Statutory Provisions

      Statutory provisions are provided side by side with legal concepts to help you swiftly locate the relevant legislation.

    • Public Law

      Case Summaries

      We have summarised important cases for you so that you don't need to read long and boring cases.

    • Evidence

      Rules and Exceptions

      Rules and exceptions are clearly listed so that you know when a rule applies and when it doesn't.

    • Company Law

      Terminology

      Legal terms and key concepts are explained at the beginning of each chapter to help you learn efficiently.

    • Case Law

      Case law is provided side by side with legal concepts so that you know how legal principles and precedents were established.

    • Law Exam Guide

      Law Essay Guide

      You will learn essential law exam skills and essay writing techniques that are not taught in class.

    • Law Exam Guide

      Problem Question Guide

      We will show you how to answer problem questions step by step to achieve first-class results.

    • Conflict of Laws

      Structured Explanations

      Complex legal concepts are broken down into concise and digestible bullet point explanations.

    • Legal System and Method

      Legal Research

      You will learn legal research techniques with our study guide and become a proficient legal researcher.

    • Jurisprudence and Legal Theory

      Exam-focused

      All essential concepts, principles, and case law are included so that you can answer exam questions quickly.