Proprietary estoppel
![In Greasley v Cooke, over a house in Riddings, the Court of Appeal affirmed that once an assurance is found, the burden of proof is on the defendant to show that it was not relied up to the claimant's detriment.](/Images/godic/202502/04/Park_Mews,_Church_Street,_Riddings_-_5946932136.jpg")
Proprietary estoppel is a legal claim, especially connected to English land law, which may arise in relation to rights to use the property of the owner, and may even be effective in connection with disputed transfers of ownership. Proprietary estoppel transfers rights if,