A defaulting purchaser under a contract for sale of land has no automatic entitlement to recover the value of permanent improvements made to the property. Recovery depends on establishing either unconscionability (that it would be unconscionable for the vendor to retain the benefit of improvements without compensation) or unjust enrichment. The cases previously cited as supporting an automatic entitlement (Lexane v Highfern, Sandeman v Wilson, Rawson v Hobbs) do not clearly establish such a right. Proprietary estoppel is not available where the parties' dealings are governed by binding contracts specifying the terms on which the property may be acquired.
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