Proprietary Estoppel
Core Elements
A claimant must establish (Thorner v Major [2009] UKHL 18; Gillett v Holt [2001] Ch 210):
- Assurance — a representation or assurance by the landowner regarding the claimant's rights.
- Reliance — the claimant relied on that assurance.
- Detriment — the claimant suffered detriment in consequence of their reliance.
The court asks whether, viewed in the round, it would be unconscionable for the representor to resile from the assurance.
Assurance
- Can be express or inferred from conduct (Thorner v Major: indirect and oblique statements sufficient if clear enough in context).
- Must relate to an identified piece of land, though not necessarily described with conveyancing precision.
Detriment
- Assessed broadly — not limited to financial expenditure; includes giving up opportunities, providing personal care, or working for low wages (Gillett v Holt).
- Detriment is judged at the point it would be inequitable to resile, not at the date of the assurance.
Satisfying the Equity: Remedies
The court has wide discretion to fashion a remedy proportionate to the detriment, not simply to give effect to the expectation:
- Transfer of the freehold (where expectation and detriment are commensurate: Pascoe v Turner [1979] 1 WLR 431).
- A long lease or life interest.
- A licence to occupy.
- Monetary compensation only (Jennings v Rice [2002] EWCA Civ 159: remedy may be limited to detriment where expectation is disproportionate).
Effect on Third Parties (Registered Land)
- An equity by estoppel is capable of binding successors in title.
- Before the equity is satisfied by court order, it is an inchoate equity — it should be protected by a notice on the register (LRA 2002, s.116 confirms it is a proprietary interest capable of binding successors).
- If the estoppel claimant is in actual occupation, the inchoate equity can also bind as an overriding interest under Sch.3 para.2 LRA 2002.
Common Traps
- Proprietary estoppel can arise even without a written contract — it bypasses the s.2 Law of Property (Miscellaneous Provisions) Act 1989 formality requirement for contracts.
- The remedy is not automatic enforcement of the expectation — it is the minimum necessary to do justice.
Exam tip: Always address all three elements (assurance, reliance, detriment) in sequence, then address the appropriate remedy separately.