10. Proprietary Estoppel
All books in this flagship series contain carefully selected substantial extracts from key cases, legislation, and academic debate, providing able students with a stand-alone resource. This chapter is concerned with proprietary estoppel. Proprietary estoppel is a means by which a party (B) can gain some protection against an owner of land (A), even if B has no contract with A and even if A has not formally given B a property right in relation to A’s land. Proprietary estoppel is therefore a means by which B can obtain an equitable interest in A’s land. It is noted that proprietary estoppel is very different from other forms of estoppel; so different that the term ‘estoppel’ is positively misleading. The chapter considers the requirements of a proprietary estoppel claim, including the role of unconscionability, how the courts determine the extent of any right arising through proprietary estoppel, and the impact of such rights on third parties.