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A proprietary estoppel claim arises where someone is led to believe they will inherit or acquire an interest in property, land, or a business, and acts to their detriment in reliance on that assurance, only to later discover that the promise has not been honoured.
Proprietary Estoppel cases often involve high-value estates that include farmland, property or family businesses. Emotions run high because people may have dedicated decades of work, made personal sacrifices, or invested their own money based on what they were told would happen in the future.
Common scenarios include:
When the will or estate planning arrangements fail to reflect those promises, disputes can quickly turn bitter.
For a successful proprietary estoppel claim, three elements generally need to be shown:
A promise or assurance – whether explicit or implied – about inheritance of property, land, or a business
Reliance – the claimant acted on that promise (e.g., working long hours, investing money, or making life decisions)
Detriment – the claimant suffered detriment as a result (such as lost income or opportunities)
It must also be shown that it would be unconscionable for the promise not to be fulfilled.
Such claims can sometimes be brought during the lifetime of the person who made the promise, if it becomes clear that the assurance will not be honoured. More often, they arise after death when the Will is read and does not reflect the assurances made.
Over the years, many proprietary estoppel cases have arisen in agricultural contexts. This is partly because farming families often rely on informal promises and understandings rather than formal legal documents. It is also because farms are high-value assets where ownership and succession are crucial for long-term survival.
Our firm has particular expertise in both farming inheritance disputes and business probate disputes, making us ideally placed to advise on proprietary estoppel claims.
Proprietary estoppel claims are often complicated by the nature of the estate. We frequently advise on cases involving:
We will:
You can read more about related areas of our work here:
Will, trust & inheritance disputes – Our main page covering all types of contentious probate.
Farm probate disputes – Where many proprietary estoppel claims arise.
Business probate disputes – Where succession promises concern company shares or partnerships.
Challenging an executor – Advising beneficiaries and executors alike where questions arise over estate administration, executor duties, or potential removal.
If you believe you have been unfairly denied an inheritance you were promised — or if you are defending against such a claim — our Contentious Probate team can help. We act in cases across England and Wales, with many of our clients based in York and rural North & East Yorkshire, where we can meet in person at one of our offices in York, St Saviourgate, Clifton Moor, Easingwold, Haxby, Pocklington, Malton, and Thirsk.
Contact us today for a confidential consultation.
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